What is voltage derating in ceramic capacitors?

Voltage derating is the practice of operating a ceramic capacitor at significantly less than its rated voltage, often about 50%, to maintain reliability and minimize capacitance loss.

Why should ceramic capacitors be derated?

Derating ceramic capacitors reduces the chance of shorts, parameter drift, or failure caused by voltage and thermal stress.

What is temperature derating in capacitors?

Temperature derating means lowering the maximum working temperature by about 15°C below the rated limit to reduce stress and extend the component’s service life.

How much should ceramic capacitors be derated?

A common guideline is to run ceramic capacitors at approximately 50% of their rated voltage and below the rated maximum temperature for dependable operation.

No—standard MLCCs are non-polarized and can be installed in either orientation. Observe pad layout and termination guidance from the datasheet.

What are Thickness Max and Electrode Band in the size table?

Thickness Max is the maximum overall chip height. Electrode Band is the maximum terminal overlap length at each end. Both help verify mechanical fit, solder fillet, and clearance in your footprint.

No. MLCCs are non-polarized and can be installed in either orientation. Honor voltage ratings and derating guidance.

C0G/NP0 vs X7R—when should I use each?

Use C0G/NP0 for stability and precision (RF, timing). Use X7R/X5R for higher capacitance density in decoupling and general filtering.

How much derating should I apply for DC bias?

A common starting point is choosing 2–4× the required capacitance for Class II MLCCs to cover DC-bias and temperature drift.

0402 vs 0603 vs 0805—what are the trade-offs?

Larger cases typically offer higher voltage capability, less DC-bias loss, lower ESL, and better mechanical robustness.

Why do MLCCs sometimes 'sing'?

Class II dielectrics are piezoelectric; ripple can cause audible vibration. Mitigate by using C0G where possible, adjusting mounting, or adding damping.

Circuit Functions

The Hidden Rule of Ceramic Capacitors: Understanding Voltage Derating

Jeffrey — Tue, 07 Oct 2025 01:43:56 +0000

Key Takeaways

No matter the type, ceramic capacitors are derated to protect against heavy electrical loading and negative effects from applied voltage and temperature.
Voltage derating involves lowering the working voltage to roughly 50% of the rated maximum to prevent failure.
Temperature derating means keeping the operating temperature about 15°C below the rated limit to ensure stability and long service life.

Operating a ceramic capacitor at about half of its rated voltage greatly improves reliability and minimizes risk of failure.

Types of Ceramic Capacitors

Multilayer ceramic capacitors (MLCCs) are compact components commonly used in surface-mount technology, EMI or RFI suppression, and feed-through applications. Regardless of the style, ceramic capacitors should be derated to prevent excessive electrical stress caused by voltage and temperature.

Ceramic Capacitor Derating

Engineers derate capacitors to increase reliability, protect against surge currents, and stabilize key electrical parameters. Ceramic capacitors are naturally resistant to moisture thanks to their impermeable material, but they can be less reliable at elevated temperatures. Failures may occur as shorts, opens, or gradual parameter drift. Excessive surge current can cause thermal breakdown and even catastrophic failure. Since electrical parameters like capacitance, ESR (equivalent series resistance), and ESL (equivalent series inductance) all change with voltage and temperature, derating is critical.

Ceramic Capacitor Derating Methods

Derating reduces the stress factors that accelerate failure, making capacitors less prone to breakdown. The main stressors are applied voltage and temperature, which combine to influence how long a capacitor performs reliably. As voltage nears the rated maximum, capacitance begins to drop. Rising temperatures further decrease capacitance in the circuit.

For ceramic capacitors, derating focuses on controlling these two parameters. The most common practice is voltage derating, where the applied voltage is kept around 50% below the rating. Another technique is temperature derating, which sets the maximum operating temperature roughly 15°C below the specified limit. Both methods extend life and preserve performance stability.

Ceramic Capacitor Derating Voltage

Ceramic capacitors are particularly affected by capacitance loss under applied voltage. For example, X7R capacitors can lose up to 80% of their capacitance at full rated voltage due to dipole realignment inside the ceramic. This effect is known as the voltage coefficient of capacitance.

To counter this, it’s best to select capacitors that operate well below their maximum rating. A derating guideline of about 50% ensures more stable behavior. Voltage derating is expressed as a percentage: a 30% derating means the capacitor runs at 70% of its rated value.

A good design rule is to choose a capacitor rated for at least double the applied voltage. Because stored energy increases with the square of voltage, this practice not only improves reliability but also manages energy handling safely.

For both safety and longevity, targeting about 50% of the rated voltage is considered the most reliable approach.

MLCC Size Chart (1515–13060): Dimensions, EIA & Metric

Jeffrey — Sun, 07 Sep 2025 22:16:42 +0000

Style	Length (in)	Width (in)	Thickness max (in)	Electrode band max (in)	Length (mm)	Width (mm)	Thickness max (mm)	Electrode band max (mm)
1515	0.150	0.150	0.100	0.025	3.810	3.810	2.540	0.635
1808	0.180	0.080	0.070	0.025	4.572	2.032	1.778	0.635
1812	0.180	0.120	0.110	0.025	4.572	3.048	2.794	0.635
1825	0.180	0.250	0.150	0.025	4.572	6.350	3.810	0.635
2020	0.200	0.200	0.150	0.025	5.080	5.080	3.810	0.635
2225	0.220	0.250	0.180	0.025	5.588	6.350	4.572	0.635
2520	0.250	0.200	0.180	0.025	6.350	5.080	4.572	0.635
3530	0.350	0.300	0.200	0.030	8.890	7.620	5.080	0.762
4040	0.400	0.400	0.200	0.030	10.160	10.160	5.080	0.762
4540	0.450	0.400	0.200	0.030	11.430	10.160	5.080	0.762
5550	0.550	0.500	0.200	0.030	13.970	12.700	5.080	0.762
6560	0.650	0.600	0.200	0.030	16.510	15.240	5.080	0.762
8580	0.850	0.800	0.200	0.030	21.590	20.320	5.080	0.762
11050	1.100	0.500	0.200	0.030	27.940	12.700	5.080	0.762
13060	1.300	0.600	0.200	0.030	33.020	15.240	5.080	0.762

Style	Min (pf)	Max @ 500V	Max @ 1000V	Max @ 2000V	Max @ 3000V	Max @ 4000V	Max @ 5000V	Max @ 10000V
1515	100 pf	3300 pf	1800 pf	270 pf	—	—	—	—
1808	56 pf	2200 pf	820 pf	56 pf	—	—	—	—
1812	100 pf	3900 pf	1800 pf	270 pf	—	—	—	—
1825	100 pf	0.01 µF	3900 pf	1000 pf	—	—	—	—
2020	100 pf	0.01 µF	3900 pf	1000 pf	560 pf	—	—	—
2225	100 pf	0.015 µF	0.01 µF	1200 pf	680 pf	—	—	—
2520	100 pf	0.012 µF	5600 pf	1200 pf	680 pf	—	—	—
3530	100 pf	0.033 µF	0.018 µF	3300 pf	2200 pf	680 pf	—	—
4040	100 pf	0.047 µF	0.022 µF	5600 pf	3300 pf	1200 pf	—	—
4540	100 pf	0.056 µF	0.027 µF	5600 pf	3900 pf	1500 pf	1000 pf	—
5550	560 pf	0.1 µF	0.047 µF	0.012 µF	6800 pf	2700 pf	2200 pf	—
6560	1000 pf	0.12 µF	0.068 µF	0.018 µF	0.01 µF	3900 pf	2700 pf	—
8580	1000 pf	0.12 µF	0.027 µF	0.018 µF	6800 pf	5600 pf	—	—
11050	1000 pf	0.022 µF	0.015 µF	4700 pf	3900 pf	1000 pf	—	—
13060	1500 pf	0.033 µF	0.022 µF	0.01 µF	6800 pf	1500 pf	—	—

Introduction to Multilayer Ceramic Capacitors

Multilayer ceramic capacitors (MLCCs) are crucial in electronic devices, offering a wide range of capacitance values and sizes. Over several decades, the industry has standardized MLCCs to ensure consistency and reliability.
MLCCs consist of multiple layers of ceramic dielectric material and metal electrodes, offering larger capacitance in smaller packages. They are coded with alphanumeric or numeric identifiers for easy selection.
The American EIA standards define MLCC case sizes using inch-based codes like “0805” (0.08” × 0.05”). These standardizations enable global compatibility across manufacturers.
Understanding MLCC characteristics is essential for reliable component selection in electronic design.

Characteristics of Ceramic Capacitors

Known for stable capacitance and excellent temperature characteristics, ceramic capacitors are ideal for high-frequency and power equipment. Voltage and frequency can influence their behavior.
Capacitance is determined by dielectric material, electrodes, and dimensions. External conditions like voltage can affect performance.
Different classes (e.g., Class 1 and Class 2) offer various performance traits such as temperature or voltage compensation.
Dissipation factor and frequency dependence are key considerations in capacitor selection and comparison.

Construction and Styles

MLCCs are built by stacking ceramic layers and metal electrodes, with external terminations connected to the electrodes.
Dielectric material may be paraelectric or ferroelectric, each offering unique advantages.
Electrodes (e.g., silver, copper) offer low resistance. Lead design affects parasitic inductance and frequency performance.
Packaging varies by size and style (e.g., surface-mount, through-hole). Mechanical robustness is tested via bending tests.

Capacitance and Tolerances

Capacitance depends on material, electrodes, and component size, ranging from picofarads to microfarads.

Tolerances (e.g., ±5%, ±10%) affect performance and should match application requirements. Datasheets offer detailed specs.

Examples: 100 nF ±10% for a 0603 package; 1 μF ±20% for a 1206 package. Analyze parts individually during design.

MLCCs are preferred for energy storage in high-frequency and power circuits due to their reliability.

Temperature and voltage can influence MLCC capacitance; this must be factored into design decisions.

Frequency Dependence Considerations

Capacitance in ceramic capacitors can vary with frequency. Class 1 types (e.g., NP0/C0G) are more stable at high frequencies, ideal for precision circuits. Class 2 types (e.g., X7R) show greater variation, impacting performance in RF or filter applications.

Select materials and classes based on frequency behavior to ensure consistent operation.

Application Considerations for Ceramic Capacitors

Ceramic capacitors are vital in applications from automotive to audio. Selection factors include operating temperature, voltage, and capacitance value.

Automotive applications require durability, while audio applications need low distortion and stability. Class 1 types suit high-frequency precision needs; Class 2 types provide higher capacitance in compact forms.

Matching component specs to application ensures optimal performance and reliability.

Tantalum Capacitor Replacement

MLCCs are replacing tantalum capacitors due to better range, voltage ratings, and lower ESR. They’re cost-effective and come in more sizes.

However, tantalum types are still favored in some military/aerospace uses. Always compare ESR, capacitance, and voltage before substitution.

MLCC Capacitor Size Chart

Size charts list case sizes, capacitance, voltage/current ratings, and sometimes frequency or temperature behavior.

These charts assist in selecting the proper MLCC and comparing standard component dimensions across designs.

Consult datasheets for detailed specs and performance graphs.

Soft Termination and Reliability

Soft termination uses conductive polymer to connect electrodes, reducing mechanical stress.
This improves MLCC reliability and frequency behavior.
It also enhances performance under varying temperature and humidity conditions.

Long-Term Reliability and Performance

Long-term reliability depends on voltage, temperature, and frequency. Choose capacitors with ratings that suit the environment.

Class 1 capacitors offer better long-term stability than Class 2. Regular inspection in critical applications helps maintain performance.

Careful selection ensures durability and efficiency throughout a component’s service life.

FAQ

What do EIA and JIS size codes mean for MLCCs?
EIA codes are inch-based case sizes (e.g., 0603 = 0.06″ × 0.03″). JIS codes are metric (e.g., 1608 = 1.6 mm × 0.8 mm). Both describe the chip’s length × width.

How do I convert an 0603 MLCC to metric?
0603 → JIS 1608 ≈ 1.6 mm × 0.8 mm. The chart lists both inch and mm.

Are MLCCs polarized?
No. Standard MLCCs are non-polarized.

What does NP0/C0G mean compared to X7R?
NP0/C0G (Class 1) is ultra-stable and low loss; X7R (Class 2) offers higher capacitance with more variation.

Do I need to derate voltage on MLCCs?
Yes—many designs use 50–70% of rated voltage; follow your vendor guidance.

What do tolerance and temperature characteristics mean?
Tolerance is the allowed variation from nominal. Temperature characteristics define how capacitance shifts with conditions.

Can MLCCs replace tantalum capacitors?
Often, but verify voltage, ripple, ESR, surge, and reliability needs.

What are Thickness Max and Electrode Band?
Thickness Max is the chip height; Electrode Band is the terminal overlap length—useful for footprint and solder fillet checks.

New to MLCCs? Read the MLCC basics & selection guide

Are MLCC Capacitors Polarized? | Guide to MLCC Polarity & Usage

Jeffrey — Thu, 31 Jul 2025 21:42:23 +0000

When choosing capacitors for your electronic circuits, one of the key factors engineers consider is polarity. Capacitor polarity, or the direction voltage must be applied, affects both performance and reliability. Multilayer Ceramic Capacitors (MLCCs) are the most common type of capacitors used in modern electronics. A common question arises: Are MLCC capacitors polarized?

What is Capacitor Polarity

Polarity refers to the directional dependence of certain electronic components, including capacitors. A polarized capacitor must be connected according to positive and negative terminals; reversing polarity can damage the capacitor or the circuit. Examples of polarized capacitors are electrolytic capacitors and tantalum capacitors.

Non-polarized capacitors, on the other hand, can be connected in either direction without any issues. Examples are film capacitors and ceramic capacitors, specifically MLCCs.

What are MLCC Capacitors

MLCCs, or Multilayer Ceramic Capacitors, are small, rugged capacitors made of alternating layers of ceramic dielectric material and metal electrodes. They are popular due to their small size, reliability, stability and high frequency performance. They are used in power supply circuits to signal filtering in digital electronics.

MLCCs are classified into two types based on dielectric material:

Class I MLCCs (C0G/NP0): Excellent stability and low losses, ideal for precision circuits.
Class II MLCCs (X7R, X5R, Y5V): Higher capacitance values but with more temperature dependence and capacitance variation under different conditions.

Are MLCC Capacitors Polarized

In general, MLCC capacitors are non-polarized. They don’t have positive or negative terminal, so they can be connected in either direction in a circuit. Unlike electrolytic and tantalum capacitors, reversing polarity won’t harm an MLCC capacitor or affect its operation.

However, there are exceptions, especially for high capacitance MLCCs or special designs.

The Exception: High-Capacitance MLCCs

With technology advancements, MLCC capacitors now have higher capacitance values, often comparable to tantalum or electrolytic capacitors. Some manufacturers produce high-value MLCCs that require attention to DC bias voltage due to their internal structure.While these high-capacitance MLCCs are still non-polarized, applying DC bias voltage affects their effective capacitance. The internal structure under high DC bias changes the dielectric layers and the actual capacitance reduces substantially – sometimes by 70% or more of the rated value.

Not truly polarized but require careful consideration of voltage application to meet performance specs.

MLCC vs Polarized Capacitors

Comparing MLCCs to polarized capacitors like electrolytic or tantalum:

Size and Form Factor: MLCCs are smaller and more compact for high density circuit designs.
Frequency Performance: MLCCs excel at high frequencies due to low ESR and low inductance.
Reliability: MLCC capacitors are more reliable and longer lasting as there are no electrolyte inside that degrades over time.
Temperature Stability: MLCCs especially Class I types are stable over wide temperature range compared to polarized capacitors.

Polarized capacitors like electrolytic and tantalum capacitors are chosen when large capacitance values in small space are required and when the circuit application demands specific polarized characteristics.

Applications of MLCC Capacitors

MLCC capacitors are everywhere in modern electronics. Their non-polarized nature and good electrical properties make them versatile for applications such as:

Power Supply Decoupling: Preventing voltage fluctuations in ICs.
Filtering and Signal Conditioning: Removing noise and stabilizing signals in analog and digital circuits.
High-Frequency Circuits: Providing stability in RF circuits, antennas and communication devices.
Automotive Electronics: Reliability and harsh environment resistance.

Best Practices When Using MLCC Capacitors

To ensure optimal performance and reliability of MLCC capacitors:

Check Voltage Ratings: Always choose MLCC capacitors with proper voltage ratings to prevent dielectric breakdown.
Consider DC Bias Effects: Recognize that higher voltage MLCCs may have significant capacitance change under high DC bias.
Avoid Mechanical Stress: MLCC capacitors can crack under mechanical stress especially when placed near board edges or subjected to excessive force.
Temperature Consideration: Choose capacitors based on class ratings for temperature stability depending on application requirements.

Conclusion

MLCCs are non-polarized by nature, you can orient them anywhere in the circuit without damaging or malfunctioning. While high value MLCCs requires extra consideration due to DC bias effects, they are still non-polarized.

Their small size, high reliability, frequency stability and overall versatility is why MLCC capacitors are essential in modern electronics design. Knowing their characteristics and best practices will help you use these versatile components to build reliable and high performing devices.

Mastering Surface Mount Capacitors: The Ultimate Guide to Selection, Placement, and Performance

Jeffrey — Fri, 27 Jun 2025 23:32:56 +0000

Surface mount capacitors have become the go to components in modern electronics, smaller, more efficient and high performance devices. Whether you’re designing complex circuit boards or troubleshooting complex electronics, mastering surface mount capacitors is key. This comprehensive guide covers everything from capacitor types and selection to best practices, troubleshooting and future technological trends.

Understanding the Different Types of Surface Mount Capacitors

Surface mount capacitors (SMCs) come in many forms, each suited for specific applications:

Ceramic Capacitors (MLCCs): Popular for their small size, low ESR and wide capacitance range. Good for high frequency circuits.
Tantalum Capacitors: High capacitance stability, high reliability and used in filtering and decoupling applications.
Aluminum Electrolytic Capacitors: Used in applications where high capacitance and voltage ratings are required. But larger and limited frequency response.
Film Capacitors: Stable, low loss and robust, good for precision analog applications.

Choosing the right capacitor type is the foundation of circuit performance.

Key Specifications to Consider When Selecting Surface Mount Capacitors

Important factors to consider:

Capacitance and Tolerance: Match these specs to circuit requirements.
Voltage Rating: Make sure ratings are higher than operational voltage to ensure reliability.
Equivalent Series Resistance (ESR): Important for high frequency and pulse current applications.
Temperature Coefficient: How capacitance changes with temperature variations.
Size and Form Factor: Directly impacts board space and design constraints.

Knowing these parameters helps you choose the right capacitors for your designs.

Placement in PCB Design

Capacitor placement has a big impact on PCB performance. Consider:

Decoupling Capacitors: Place as close as possible to IC pins to minimize inductance and noise.
Ground and Power Planes: Good layout of ground and power planes helps capacitors.
Thermal Considerations: Place capacitors away from heat generating components to avoid thermal degradation.
Routing Paths: Optimize paths to reduce loop areas, minimize EMI and signal degradation.

Proper placement ensures capacitors perform well, maintains circuit integrity and reliability.

Best Practices for Soldering Surface Mount CapacitorsProper soldering techniques ensures good connections and reliability:

Reflow Soldering: Recommended for precise control, uniform heating and good solder joints.
Temperature Profiles: Follow recommended temperature profiles to reduce thermal stress.
Solder Paste Application: Use right stencil thickness and precise alignment to avoid bridging and insufficient solder.
Manual Touch-Up Techniques: Use fine-tip soldering irons for small adjustments or repairs.

Following these practices reduces defects and increases board life.

Performance Analysis: Key Metrics and Testing Methods

Capacitor performance is analyzed through several tests and metrics:

Capacitance and ESR Measurements: Use LCR meters to verify specs and circuit compatibility.
Leakage Current Testing: Important for capacitor integrity, especially for tantalum and electrolytic capacitors.
High-Frequency Response: Analyze impedance characteristics across intended operational frequencies.
Thermal Stability Tests: Conduct to test reliability under varying temperatures and stress conditions.

Systematic testing ensures capacitors meet application specific requirements.

Common Mistakes to Avoid in Surface Mount Capacitor Applications

Awareness of common pitfalls ensures reliability:

Ignoring ESR Specifications: Leads to bad filtering and circuit instability.
Incorrect Voltage Rating Selection: Risks capacitor failure.
Poor Thermal Management: Overheating shortens capacitor life.
Improper Orientation or Polarity: Especially critical for polarized capacitors, causes immediate component damage.

Avoiding these mistakes ensures consistent circuit performance and component life.

Troubleshooting Surface Mount Capacitors

Identifying and fixing capacitor issues quickly:

Visual Inspection: Check for visible cracks, bulges or discoloration indicating damage.
Measurement Analysis: Use LCR meters to confirm capacitance and ESR match specs.
Thermal Diagnostics: Identify overheating capacitors through thermal imaging.
Replacement Strategies: Develop criteria for replacing capacitors based on measurement deviations and visual defects.

Fast troubleshooting reduces downtime and increases system reliability.

Future of Surface Mount Capacitor Technology

Emerging trends are changing capacitor technology:

Advanced Dielectric Materials: New ceramic and polymer formulations for better stability and lower ESR.
Miniaturization: Continuing trend towards smaller sizes without sacrificing performance.
Higher Voltage Capacitors: New materials and designs for compact capacitors to handle higher voltages.* Better Thermal Management: New thermal capabilities for capacitors to withstand tougher conditions.
Smart Systems Integration: Capacitors for IoT and smart electronics, low power, small size and high reliability.

Be ahead of the curve with these trends.

Conclusion and Summary on Surface Mount Capacitors

Master surface mount capacitors is a combination of knowing capacitor types, precise selection, placement, soldering and testing. Awareness of common mistakes and troubleshooting skills ensures good circuit performance. As technology advances, stay informed with emerging trends to design future proof electronics. Follow best practices and adapt to innovations to be a modern electronic design expert.

Mastering Surface Mount Capacitors

High Voltage Surface Mount Capacitors

Jeffrey — Wed, 30 Apr 2025 21:08:54 +0000

High Voltage Surface Mount Capacitors

High voltage capacitors are for high voltage applications, with various capacitance values and case sizes. They come in surface mount and leaded devices to suit different design requirements.

Multilayer ceramic capacitors (MLCCs) are a type of capacitor that has high capacitance and low tolerance, good for power supply and voltage multiplier applications.

Capacitors are an essential component in electronic devices, and understanding their characteristics is key to designing high voltage applications.

Ceramic capacitors are popular for high voltage applications because of high voltage withstand and low leakage current.

Types of Capacitors

High voltage capacitors come in different types, each for specific application. Among the most common are multilayer ceramic capacitors (MLCCs) and surface mount devices (SMDs). MLCCs are best for high voltage applications, with broad range of capacitance values and high reliability. These capacitors use ceramic material as dielectric, which has high stability and low leakage current, good for harsh environments.

Ceramic capacitors, a subset of high voltage capacitors, are robust and reliable. They come in various case sizes, 0402, 0603, 0805 and can handle voltage from 500VDC to 10,000VDC. For example high voltage capacitors are required in power supply applications, filtering circuits and devices like resonators and snubbers that need precise and stable performance.

The choice of material affects the performance and reliability of high voltage capacitors. Ceramic material is favored for its excellent dielectric properties and high voltage withstand. By choosing the right type and material, designers can minimize the risk of electrical shock or damage and ensure safe and efficient operation of high voltage applications.

Surface Mount Technology

Surface mount technology (SMT) is a method of mounting components on a printed circuit board (PCB) using a surface mount device (SMD).

High voltage SMT capacitors are designed to operate continuously at full rated voltage across the entire operating temperature range.

SMT capacitors have many benefits, high capacitance, low tolerance and small case sizes, good for high voltage applications.SMT capacitors are available with ultra-stable Class I, NPO and stable Class II, X7R dielectric materials for different applications.

High voltage SMT capacitors need to consider clearance and creepage requirements to ensure safe and reliable operation.

Start your inquiry about SMT capacitors to learn more about their components and design options.

High Voltage Applications

High voltage applications require specialized components including high voltage capacitors to ensure safe and reliable operation.

High voltage capacitors are used in power supply, voltage multiplier and resonator circuits.

High voltage applications involve high power and high voltage which can be dangerous if not handled properly.

Capacitors play a critical role in high voltage applications and choosing the right capacitor is key to achieve the desired performance and safety.

High voltage capacitors are designed to operate within a specific temperature range and meet RoHS compliance.

For more information about high voltage applications, please contact our customer support team.

Installation and Handling

Proper installation and handling of high voltage capacitors is crucial to ensure their safe and reliable operation. SMT high voltage capacitors in particular need to be handled carefully to avoid damage to their terminations or the device itself. Anti-static precautions are highly recommended to prevent damage from static electricity which can affect the capacitor’s performance.

When installing high voltage capacitors, it is important to minimize the risk of electrical shock or damage. This means choosing the right case size and capacitance value to meet the application requirements. In some cases high voltage capacitors can be used in series to achieve higher voltage ratings. But this requires careful consideration of the total capacitance value and the associated risks.

Follow the reference design provided by the manufacturer is critical to ensure safe and reliable operation. Manufacturers often provide detailed guidelines and FAQs on their website or through customer support. Note that high voltage capacitors are designed for specific applications and should not be used in environments where they may be exposed to excessive voltage or current. For more information, click on the manufacturer’s website to learn more about the proper use and applications of high voltage capacitors.

Safety and Reliability

High voltage capacitors are designed to meet high safety and reliability standards and are essential in high voltage applications. These capacitors reduce the risk of electrical shock or damage and ensure safe operation of high voltage systems. Ceramic capacitors are popular due to their high reliability and stability which is critical in demanding applications.

Many high voltage capacitors come with safety features such as overvoltage protection and thermal monitoring. These features enhance the capacitor’s ability to operate safely under different conditions. The standard for high voltage capacitors is to provide high level of safety and reliability and many devices meet or exceed international safety standards.

When designing a system that includes high voltage capacitors, it is important to consider the voltage and current ratings to ensure safe and reliable operation. The link between the high voltage capacitor and the rest of the system must be designed carefully to minimize the risk of electrical shock or damage. High voltage capacitors are designed to achieve high reliability and long lifespan, many devices offer mean time between failures (MTBF) of thousands of hours.

To learn more about high voltage capacitors and their applications, contact our customer support. It is important to agree to follow the safety precautions and guidelines when handling and installing high voltage capacitors to ensure their safe and reliable operation.

Capacitor Selection

Choosing the right capacitor for high voltage application requires careful consideration of several factors including capacitance, voltage and case size.
High voltage capacitors are available in different case sizes from 0402 to 8060 and voltages from 10V to 12kVdc.
Capacitor selection also depends on the application such as timing/precision circuitry, energy storage, DC blocking, snubbers, transient suppression, decoupling, resonators and EMI filtering.
Capacitor material such as ceramic or film also plays a critical role in determining the capacitor’s performance and reliability.
Capacitor termination such as surface mount or leaded is also an important consideration in capacitor selection.

High Voltage X7R Ceramic Chip Capacitors

Jeffrey — Thu, 03 Apr 2025 16:22:31 +0000

Professional Grade Multilayer Ceramic Capacitors for Demanding Applications

Product Overview

Circuit Functions’ High Voltage X7R Ceramic Chip Capacitors are the best of multilayer ceramic capacitor (MLCC) technology, designed for applications that require high voltage reliability. These precision made components combine high performance with mechanical ruggedness, perfect for critical circuit designs in industrial, medical, telecommunications and automotive sectors.

Key Features & Specifications

Voltage Ratings:

Available in range from 500V to 5000V DC
Industry leading voltage stability with minimal derating
Tested and certified for continuous operation at rated voltage

Capacitance Range:

10pF to 4.7μF to suit various circuit designs
Tight tolerance options: ±5%, ±10%, ±20%
Capacitance value consistent across operating temperature range

Temperature Performance:

X7R dielectric: ±15% capacitance change from -55°C to +125°C
Excellent thermal stability for extreme environments
Low ESR and ESL across entire temperature range

Physical Characteristics:

Multiple case sizes: 0805, 1206, 1210, 1808, 1812, 2220, 2225
Proprietary termination: standard tin, RoHS compliant, custom
Highly resistant to thermal shock and mechanical stress

Reliability Metrics:

MTBF >1,000,000 hours at rated voltage and temperature
MSL: 1
100% tested and inspected for electrical performance

Applications

Our high voltage X7R ceramic capacitors are used in:

Switch-mode power supplies and DC-DC converters
Medical imaging and diagnostic equipment
Telecommunications infrastructure
LED lighting drivers and ballasts
Industrial automation and control systems
Automotive safety and powertrain systems
High-reliability aerospace and defense applications

Technical Advantages

Superior Voltage Handling: Our internal electrode design and ceramic formulation allows for high voltage stability and minimizes the risk of breakdown under transient conditions. This ensures long term reliability in high voltage environments where other MLCCs will fail.

Thermal Management: X7R dielectric provides excellent temperature stability and high volumetric efficiency. This allows for smaller component footprint without sacrificing performance or reliability even in thermal harsh environments.

Low Acoustic Noise: Special internal construction minimizes piezoelectric effects resulting in reduced acoustic noise generation – a critical requirement for audio equipment and medical devices.

Design Flexibility: With multiple package sizes, voltage ratings and capacitance values our high voltage X7R capacitors can be matched to your exact circuit requirements eliminating the need for over engineered solutions.

Quality Assurance & Compliance

ISO 9001:2015 certified manufacturing process
RoHS and REACH compliant
Halogen free options available
Lot specific documentation
AEC-Q200 qualified for automotive applications

Packaging & Availability

Tape and reel packaging for automated assembly
Standard packaging quantities: 1,000, 2,500, 5,000
Custom reels available
Global inventory for fast delivery
Sample kits available for engineering evaluation

Technical Support

Our application engineers are available to assist with component selection, design validation and problem solving. With decades of combined experience in high voltage circuit design we can help optimize your application for maximum performance and reliability.

Custom Solutions

Beyond our standard catalog offerings Circuit Functions can develop custom high voltage capacitor solutions to your specific requirements. From special voltage ratings to unique package dimensions our engineering team can design and manufacture components to match your circuit needs.

200°C Leaded Ceramic Capacitors | High-Temp NPO & X7R

Jeffrey — Tue, 01 Apr 2025 22:20:00 +0000

🔥 200°C Leaded Ceramic Capacitors

Extreme Temperature | High Reliability | Stable Performance

✅ Overview

200°C Leaded Ceramic Capacitors from Circuit Functions are high temperature ceramic capacitors designed to perform reliably in extreme temperature conditions. Rated for continuous operation from -55°C to +200°C, these high performance capacitors are available in Class I NPO and Class II X7R dielectric materials, each for different applications. Whether you’re designing for aerospace, automotive, downhole oilfield electronics or high temperature industrial systems, these leaded ceramic capacitors will outlast other components.

🧪 Dielectric Options

🔹 Class I – NPO (C0G) Dielectric

Ultra-stable with temperature, voltage, and frequency
Capacitance drift (<±30ppm/°C)
Ideal for precision circuits: oscillators, filters, RF designs

🔸 Class II – X7R Dielectric

Higher capacitance values with moderate temperature variation (±15%)
General purpose applications: bypassing, decoupling and filtering
Cost effective with solid thermal stability

🔧 Key Features

🔥 200°C Operating Range: Reliable operation in extreme heat
📏 Leaded Design: Easy to integrate into through-hole or hybrid PCB assemblies
⚡ Voltage Ratings: Available from 25VDC to 200VDC
🧱 Compact Sizes: Ideal for space-constrained high-temp applications
🎯 Stable Capacitance: Especially critical for mission-critical timing and RF circuits

🌍 Application-Specific Benefits

🛢️ Oil & Gas Exploration

Used in MWD/LWD systems, downhole sensors, and control tools:

Handles severe temperature gradients and pressure conditions
Maintains capacitance even under vibration and thermal stress

✈️ Avionics & Aerospace

Used in engine sensors, flight control electronics, and satellite systems:

NPO variants are perfect for RF signal stability
Reliable at high altitudes and rapid thermal cycling

🚗 Automotive & EV Systems

Used in ECUs, ignition systems, BMS modules, and DC/DC converters:

Rated for under-hood heat up to 200°C
Withstands vibration and thermal shock in harsh environments

🏭 Industrial Electronics

Used in motor drives, high-temp sensors, furnace control systems:

Operates 24/7 in high-ambient-temperature industrial zones
Long-term stability in chemically aggressive atmospheres

🛰️ Military & Space Applications

Used in missile systems, rugged comms, and aerospace control modules:

NPO class ensures no drift in RF and timing circuits
Qualified for environments requiring high MTBF

🌋 Geothermal & Energy Sector

Used in sensor interfaces for geothermal wells and energy conversion systems:

Resilient in prolonged 180–200°C exposure
Maintains accuracy over long deployment periods

📐 Specifications

Parameter	Description
Temperature Range	-55°C to +200°C
Dielectrics Available	NPO (Class I), X7R (Class II)
Capacitance Range	pF to low µF (application dependent)
Voltage Ratings	25VDC, 50VDC, 100VDC, 200VDC
Configuration	Axial or radial leaded
Application Enclosure	High-temp ceramic body

📎 Request a Quote or Custom Spec

Need help specifying a part for your application? Looking for military-grade or custom-packaged versions?

👉 Contact Us Today for datasheets, engineering support, or bulk pricing.

C0G MLCC: Key Benefits and Applications in Electronics

Jeffrey — Mon, 03 Mar 2025 23:53:04 +0000

What are C0G MLCCs?

C0G MLCCs are ceramic capacitors with high stability and reliability.
Made with temperature-compensating EIA Class I ceramic material with neodymium, samarium and other rare earth oxides.
C0G MLCCs have low tempco and high capacitance value.

Features and Benefits

High stability and reliability over wide temperature range (-55°C to 125°C).
Low tempco (±30ppm/°C) and high capacitance value.
Negligible capacitance drift or hysteresis (<±0.05%).
Low dielectric absorption and high insulation resistance.
Suitable for high frequency applications due to low ESR and ESL.

Ceramic Capacitor Types and Classes

Ceramic capacitors are classified into three main classes: Class I, Class II and Class III.
Class I capacitors like C0G are high stability and low tempco.
Class II capacitors like X7R and X5R are more common and balanced between stability and capacitance value.
Class III capacitors like Y5V are high capacitance value but lower stability.

Design Considerations for C0G MLCCs

Consider the operating temperature range and voltage coefficient when selecting a C0G MLCC.
Ensure the capacitor is rated for the required capacitance value and voltage.
Consider the DC bias effect and short circuit current when designing with C0G MLCCs.
Use the right dielectric material and formulation to minimize capacitance change and temperature compensating.

Applications of C0G MLCCs

C0G MLCCs are suitable for high frequency applications like RF and microwave circuits.
Used in audio and video equipment like filters and coupling capacitors.
Suitable for automotive and aerospace applications due to high reliability and stability.

Conclusion

C0G MLCCs have high stability and reliability.
Low tempco and high capacitance value makes them suitable for high frequency applications.

Essential Guide to MLCC Capacitors: Types, Benefits, and Applications

Jeffrey — Wed, 11 Dec 2024 20:00:26 +0000

Key takeaways

MLCCs are compact, low-ESR capacitors built from stacked ceramic dielectrics and metal electrodes—ideal for decoupling, filtering, RF, and timing.
Pick Class I (C0G/NP0) for precision and stability, and Class II (X7R/X5R/Y5V) for higher capacitance density.
Apply DC-bias and temperature derating (often choose 2–4× the nominal value you need) and leave voltage margin.
Match the case size to your voltage, ripple/ESR, and mechanical-stress constraints. See the full MLCC size chart (1515–13060).

What is an MLCC?

A multilayer ceramic capacitor (MLCC) is a stack of alternating ceramic dielectric layers and metal electrodes, co-fired into a single SMD component (0402, 0603, 0805, 1206, etc.). Ceramic construction yields very low ESR/ESL, excellent high-frequency behavior, and a small footprint compared to film or electrolytic capacitors of the same value.

Why MLCCs are popular

Low ESR & ESL → great for high-frequency decoupling and filtering
Small footprint → dense layouts and mobile/IoT boards
Wide voltage range → from a few volts to hundreds (depends on size/dielectric)

MLCC dielectric classes (and when to use each)

Class I (e.g., C0G/NP0)

Stability: Excellent. Minimal change over temperature, voltage, or time
Losses: Very low (good Q), low microphonics
Capacitance range: Small (pF to low nF, sometimes tens of nF)
Best for: Precision/RF, timing, filters, resonant circuits, low drift

Class II (e.g., X7R, X5R, Y5V)

Stability: Moderate to poor vs Class I
Losses: Higher; microphonics possible (piezoelectric effect)
Capacitance range: Much higher (nF to tens of µF in SMD)
Best for: Bulk decoupling/bypass, general filtering where value drift is acceptable

Quick comparison (rule-of-thumb)

Property	C0G/NP0 (Class I)	X7R (Class II)	X5R (Class II)	Y5V (Class II)
Typical stability	★★★★★	★★★☆☆	★★★☆☆	★☆☆☆☆
Capacitance density	★☆☆☆☆	★★★☆☆	★★★★☆	★★★★★
Temp rating (typ.)	0±30 ppm/°C	−55 to +125 °C	−55 to +85 °C	−30 to +85 °C
DC-bias sensitivity	Very low	Medium–High	High	Very high
Common uses	RF, timing, precision	Decoupling, general	High-density decoupling	Space-saving, non-critical

Always confirm exact specs in the manufacturer datasheet.

DC-bias derating (the pitfall everyone hits)

Class II MLCCs lose capacitance as DC voltage is applied. The smaller the case and the higher the dielectric constant (X7R/X5R), the more drop you’ll see.

Practical rule-of-thumb

If you need C_required = 1 µF at 3.3 V in a small case (e.g., 0402 X5R), pick 2–4 µF nominal so that under bias and temperature, the effective capacitance stays ≥ 1 µF.
Prefer larger cases (0603/0805) for less bias loss at the same nominal value.

Tip: If the value is critical across voltage and temperature, step up to C0G/NP0 (accepting a lower nominal capacitance) or use multiple parts in parallel.

Voltage rating & headroom

Choose a voltage rating with ≥ 2× headroom over your maximum steady DC voltage.
For pulsed or surge environments, increase margin or consider soft-termination and surge-rated series.
Higher voltage parts often require larger case sizes (0805, 1206, 1210, etc.).

Case sizes & coding (0402–1210+)

Case size affects voltage capability, bias derating, ESR/ESL, and mechanical robustness. For full dimensions, thickness, and electrode band data, see the MLCC size chart (1515–13060).

General guidance

0402/0603: Great near fast IC pins; watch DC-bias loss and handling damage.
0805/1206: Better voltage margin and lower bias loss; more robust to flex.
Larger packages (1210/13060): Higher voltage or special apps; manage board stress.

Selection workflow (5 quick steps)

Define the job: Decoupling, bulk energy storage, RF coupling, timing, or filter? Required frequency band?
Set the effective C target: Determine C at operating voltage and temperature (not just nominal). Use datasheet DC-bias curves.
Pick dielectric: Class I (C0G/NP0) for stability/precision; Class II (X7R/X5R) for density/decoupling.
Choose voltage & case size: Apply ≥ 2× voltage margin, then pick a case that meets bias/ESR/ESL and mechanical needs.
Check reliability & layout: Consider flex cracking risks, soft termination, pad design, and mounting location.

Common applications

High-speed digital decoupling

Place small case MLCCs (0402/0603) as close as possible to VDD/GND pins.
Use several values (e.g., 100 nF + 1 µF) to cover a broader frequency band.
Parallel parts reduce ESR/ESL further.

Power supply input/output filtering

Use larger case X7R/X5R for bulk energy; add a small C0G in parallel to catch HF ripple.
Verify ripple current and self-resonant frequency in your frequency range.

RF & precision networks

C0G/NP0 for VCOs, filters, oscillators, and precision timing where drift is unacceptable.

Automotive/harsh environments

Consider AEC-Q200 components, soft-termination, and derate aggressively for temperature and surge.

Reliability & failure modes

Flex cracking

MLCCs can crack from board bending or thermal/mechanical stress.
Mitigate with soft-termination, proper pad design, avoid corners/edge-mounting, and support panels during depanelization.

Dielectric breakdown / over-voltage

Respect the voltage rating and transients; add transient suppression if needed.

Microphonics (“singing”)

Class II ceramics are piezoelectric; electrical ripple can cause physical vibration.
Use C0G, change mounting/orientation, or damp mechanically if audible noise matters.

Soldering & handling guidelines (quick checklist)

Storage: Keep dry; follow MSL guidance where applicable.
Preheat: Limit thermal shock; follow reflow profile.
Placement: Keep away from board edges; add slots near connectors if flexing is expected.
Cleaning: Avoid residues that could lead to leakage paths.
Inspection: X-ray/optical on critical builds to detect cracks or tombstoning.

When not to use an MLCC (and what to use instead)

Need very high, stable capacitance with low bias sensitivity → consider film (stable, larger).
Need hundreds of µF in small form → polymer electrolytic or tantalum polymer (watch ripple/ESR limits).
Need ultra-low loss at audio or power frequencies with no piezo effects → film capacitors.

FAQ

Are MLCCs polarized?

No. MLCCs are non-polarized and can be installed either way. Always honor the voltage rating and derating guidance.

C0G/NP0 vs X7R: which should I choose?

Choose C0G/NP0 for stability/precision (RF, timing). Choose X7R/X5R for higher capacitance in tight spaces (decoupling, bulk bypass).

How much derating is enough?

A common starting point is 2–4× the required capacitance for Class II to cover DC-bias and temperature; verify against the datasheet’s curves.

0402 vs 0603 vs 0805—what changes?

Larger cases usually mean better voltage headroom, less bias loss, lower ESL, and better mechanical robustness, at the cost of board area.

Why do some MLCCs “sing”?

Class II ceramics are piezoelectric; ripple can cause audible vibration. Solutions: shift to C0G where feasible, alter mounting, or mechanically damp.

For package dimensions and electrode band details, see the MLCC size chart (1515–13060).

Everything You Need to Know About Multilayer Ceramic Capacitors MLCCs

Jeffrey — Wed, 06 Nov 2024 22:35:22 +0000

What Are Multilayer Ceramic Capacitors (MLCCs)?

Multilayer Ceramic Capacitors (MLCCs) are the backbone of modern electronics, providing high capacitance in a small package. These capacitors are made with layers of ceramic dielectric material and conductive plates, together creating a rugged high performance component. MLCCs are used in many applications from consumer electronics to automotive and telecommunications systems.

How Do MLCCs Work?

The working of MLCCs is storing electrical energy between multiple ceramic layers. The ceramic material is the dielectric and the metal plates are conductive, so charge accumulates. When an MLCC is put in a circuit it smooths out voltage, filters and stabilizes power, reduces noise and interference in electronic devices.

Key Benefits of MLCCs

1. High Capacitance in Small Size

MLCCs are designed with multiple ceramic layers that increase capacitance without increasing the component size. This high capacitance to size ratio allows MLCCs to be used in small devices like smartphones, laptops and other portable electronics.

2. Excellent Stability and Reliability

MLCCs have good temperature stability, they are highly reliable in various environmental conditions. They are age resistant, so performance is consistent over time which is critical in applications where long term reliability is required.

3. Cost Effective and Widely Available

Due to mass production MLCCs are cost effective and widely available. This makes them a popular choice for manufacturers across different industries.

Types of MLCCs

MLCCs come in different types, each suited for specific applications. Here are some of the main types:

Class I MLCCs

Class I MLCCs have high stability and low capacitance values, used in applications that require precise frequency control like RF circuits.

Class II MLCCs

Class II MLCCs have higher capacitance but lower stability than Class I. They are used in general applications like decoupling and filtering in power supply circuits.

Applications of MLCCs in Various Industries

Consumer Electronics

MLCCs are used in smartphones, laptops and other portable electronics due to their small size and high capacitance.

Automotive

In cars MLCCs manage voltage stability, filtering and noise suppression, especially in advanced driver assistance systems (ADAS) and infotainment systems.

Telecommunications

MLCCs are used in telecommunications for noise reduction, voltage stability and high frequency circuits.

Choosing the Right MLCC for Your Project

When selecting an MLCC consider the following:

Capacitance: Choose the right capacitance value for your circuit.
Voltage Rating: Make sure the MLCC can handle the circuit voltage without breakdown.
Temperature Coefficient: Depending on your application choose MLCCs with suitable temperature coefficient.
Package Size: Compact MLCCs are for portable devices, larger ones for industrial use.

How to Identify High-Quality MLCCs

Quality is critical in MLCCs especially for critical applications. Look for components from reputed manufacturers, check the temperature and voltage ratings and verify they meet industry standards.

Conclusion

Multilayer Ceramic Capacitors (MLCCs) are the backbone of modern electronics, providing high capacitance to size ratio, stability and reliability. They are used in many applications from consumer electronics to automotive systems. By understanding how MLCCs work and the factors to consider when selecting the right one you can optimize your designs and ensure performance and longevity in your projects.