About Circuit Functions, Inc.

Welcome to Circuit Functions, Inc. CFI has been a ceramic capacitor manufacturer for over 50 years. Our company is committed to providing quality ceramic capacitors, excellent customer service and lead times unsurpassed in the industry.

In addition to our product line of high-voltage and high-temperature ceramic capacitors, we also specialize in custom capacitors to meet your specifications.. Our components support a variety of markets including aviation and aerospace, oil service and exploration (downhole), power supply, and a wide range of commercial and industrial applications.

Circuit Functions, Inc. is a privately owned and operated company established in 1968 by Raymond “Jack” Geib. Jack opened his first manufacturing facility in Southern California. He moved the manufacturing operations in 1983 to Carson City, Nevada. His focus was to provide high-quality ceramic capacitors, excellent customer service, and quick reliable delivery times. Through the years, CFI has established a strong reputation as a quality ceramic capacitor manufacturer, due to the uncompromising quality of our products and dedicated service to our customers. Today, Jack’s vision remains with the company. As we move forward to enhance our products and service, we will continue to live up to this commitment.