Product Type: Wirewound

Leaded Resistors


KOA Speer offers a wide variety of leaded resistors consisting of different materials. Each type offers a unique advantage. The semi-precision metal film MF resistor meets the requirements of MIL-R-22684. The MO has a flameproof silicone coating equivalent to UL94V0. The carbon film CFP of the CF series has a flameproof coating. The ceramic HPC resistor offers anti-pulse characteristics and are non-inductive. The BGR, BWR, BSR, a ceramic case resistor flame-retardant insulated case, are high power resistors that are excellent with anti-pulse and inrush current with cores of wire-wound and oxide tecnology


  • Suitable for automatic machine insertion
  • Product with lead-free terminations meet EU RoHS and China RoHS requirements
  • AEC-Q200 Qualified


  • High voltage circuits for x-ray generators and electron microscopes
  • Power supply
  • Flyback transformer

KOA Speer

Whether you’re designing the car of tomorrow or connecting the Internet of Things, you need cutting-edge product solutions to bring your design to fruition.  At KOA Speer, we’re the ideal partner to help you do just that.  Our constantly expanding line of passive components will give you the solution to make your concept a reality!

More Than Just Resistors – yes we’re the world leader in thick film resistors, but our product line is broad and growing every day, including:

  • Shunt/Current Sense Resistors
  • Wide Terminal Resistors
  • High Voltage Resistors
  • Thin Film Chip Resistors
  • Surge Resistors

New Passive Component Solutions – our engineering group will work with your design team to develop the passive component solution you need.  Many of the hundreds of new products we’ve introduced in recent years are the result of such collaboration.


Surface mount (SM) molded wirewounds with compliant leads to eliminate solder joint failures from board flex or thermal expansion. Power ratings from 1 to 5 watts, resistance values from 0.01 to 5K ohm, tolerances as low as 0.5%.  High surge handling capability in a surface mount device and can be used to replace multiple SMD film chips for space and size reduction.

IRC / TT Electronics

We design and manufacture resistors and precision resistor networks. We are recognized as being an innovative leader in the design, development and manufacture of resistors since the very beginning of the electronics industry. We are trusted by designers to provide custom solutions for critical applications from space flight controllers to medical defibrillators.

Other TT Electronics brands include: BI Technologies, Optek ,and Roxspur


RCD is a US based ISO 9001/2008 manufacturer specializing in a breadth of capabilities across passive components.  40+ years of precision and power experience positions them as a leader in markets across the spectrum (instrumentation, audio, medical, military, aerospace & transportation to name just a few).  Their global agility meets the demands of service, quality, delivery and price in a changing landscape.  The RCD SWIFTTM Program is designed to be the “get out of jail” almost free card.  Don’t forget to ask us about it!

Stackpole Electronics

Founded in 1928, Stackpole Electronics is a leading global manufacturer of resistive components including Thick and Thin Film Surface Mount resistors, Axial Leaded and Wirewound resistors, Current Sense resistors, Varistors, Inductors and various Power Resistors.


Founded in 1925, Ohmite has been the leading provider of resistive products for high current, high voltage, and high energy applications for over 90 years. The company’s full complement of resistor construction includes wirewound, wire element, thick film, and ceramic composition. Additionally, Ohmite provides thermal support with an extensive line of extruded heatsinks designed for board level applications.

Strengthened by the backing of Heico Companies LLC, Ohmite strives to maintain the flexibility needed to handle both large and small requirements. Made to order parts are always considered and new technologies are always being evaluated. Product availability in today’s market is critical to the success of our customers. Ohmite’s network of international distributors and sales representatives enables us to fulfill the requirements of an increasingly global marketplace.