About Capacitor Industries

Capacitor Industries is comprised of 3 marketing divisions; Motor Capacitors, Inc., Chicago Condenser Corporation, and SEI Capacitors, Inc. Through the synergy of three companies, we have found efficiency and flexibility which have fueled our dynamic growth since 1990. With leadership and experience, Capacitor Industries is positioned to face the challenges and opportunities of today and into the future.

Our headquarters is located just 15 minutes from Chicago’s O’Hare International Airport.

Our Mission

Capacitor Industries is committed to providing our customers with Premium-Quality, High Performance products, Technical Expertise, and World-Class Customer Service.

We have and will continue to grow by satisfying the requirements of our customers; quality-made capacitors, innovative designs, true customer service, and competitive prices.



Motor Capacitors, Inc.

Motor Capacitors, Inc. was founded in 1990 to service the capacitor requirements of the Electric Motor Industry. We offer our customers access to specialty and standard capacitor products.

UL, CSA, VDE, TUV, and other agency approvals are available. Motor Capacitors maintains a very large inventory of metalized film capacitors ready for immediate shipment. Applications include health and fitness equipment, industrial blowers, refrigeration, centrifuges, water pumping systems, and power conditioning.

Our products include:

  • Oil-filled motor-run capacitors
  • Dry-type motor-run capacitors
  • Aluminum electrolytic motor-starting capacitors
  • Noise-suppression (across the line) capacitors

A large inventory is maintained for our customers in our Wood Dale facility. We accept blanket orders and ship JIT, KANBAN, or against a release schedule. We provide custom designs, custom sizes, and customer-specified marking and packaging.



Chicago Condenser Corporation — “Made in U.S.A.”

Chicago Condenser Corporation was founded in 1945 and was acquired by Capacitor Industries in 1993. Chicago Condenser Corporation manufactures a wide range of high voltage capacitors from 100 volts to 100,000 volts for DC, AC, and pulse discharge applications. Applications include cardiac defibrillators, airport runway lighting, radio and TV transmitters, X-Ray, and scientific apparatus.

All Chicago Condenser Corporation products are made in U.S.A.

Our products include:

  • High-voltage capacitors in both standard and a wide range of specialty designs, from 1,000 Volts to 100,000 Volts for DC, AC, and pulse discharge applications.
  • Snubber (Commutation) capacitors
  • Custom-designed capacitors are also available

Our dielectric systems utilize polypropylene and polyester films, Kraft paper, and capacitor-grade aluminum foil to achieve superior performance and long-life. All of our impregnating fluids are non-PCB and non-toxic.



SEI Capacitors, Inc.

SEI Capacitors, Inc. was founded in 1961 and was acquired by Capacitor Industries in 1995. SEI Capacitors, Inc. manufactures metalized film capacitors for critical applications. Applications include Aerospace and Avionics, Instrumentation, Industrial and Manufacturing Equipment, and Power Conditioning Systems.

Our Aluminum Electrolytic products include:

  • Computer Grade (Screw Terminal type)
  • Snap-In
  • Radial-Leaded Miniature
  • Photo-Flash
  • Custom-designed capacitors of several different technologies