About Us

Circuit Functions, a USA based capacitor manufacturer specializing in providing  high temp capacitors and high voltage capacitors

Welcome to Circuit Functions, Inc. CFI has been a ceramic capacitor manufacturer for over 45 years. Our company is committed to providing quality ceramic capacitors, excellent customer service and lead times unsurpassed in the industry. Most lead times range from one to six weeks.

In addition to our product line of high voltage ceramic capacitors, high temperature ceramic capacitors, and “tight” tolerance ceramic capacitors, we also specialize in custom design capacitors, chip capacitors, and other electrical components. Our components support a variety of markets including commercial, telecommunications, aviation and aerospace, oil service and exploration (down hole), and other high temperature 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.