Welcome to Circuit Functions Inc.

Founded in 1968, Circuit Functions Inc. (CFI) has grown to be a respected provider of ceramic capacitors worldwide. Circuit Functions, Inc. is an ISO 9001:2008 certified company. All CFI products are made in the USA at our facility in Carson City, Nevada. We manufacture a variety of multilayer ceramic capacitors which include high voltage chip and leaded capacitors, high temperature chip and leaded capacitors for both low and high voltage applications, surface mount capacitors and custom capacitors tailored to meet the specific needs of our customers.

CFI capacitors support a variety of applications and markets including aerospace and avionics, down-hole drilling, oil exploration and other high temperature electronics, power supply, telecommunications and a wide range of commercial and industrial applications.

The CFI team takes pride in our superior customer service and satisfaction, along with lead times unmatched in the industry. We are committed to providing the very best in service, quality, reliability and on-time delivery all the time.

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  • ISO 9001:2008 Certified

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  • Contact Us Today

    For product information, pricing, delivery, and for special capacitor requirements, contact CFI and we will be happy to assist you with your specifications. Read More

  • Online Product Catalog

    In addition, we specialize in custom sizes, values, and voltages. Our goal is to provide quality high voltage capacitors, high temperature capacitors, and custom capacitors to your exact requirements. Read More