Product Type: Precision



KOA offers a complete line-up of Sulfur Resistance Thick-Film Resistors for those sulfur-rich environments. This includes our Surge, Wide-Terminal, and High-Voltage Sense Resistors; and our Precision and General-Purpose Thick-Film Resistors.


  • Excellent antisulfuration characteristics due to the use of high sulfuration-proof inner top electrode material.
  • Excellent heat resistance and environmental resistance by applying metal glaze thick film to resistive film
  • High stability and high reliability with the triple-layer structure of the electrode
  • Suitable for flow and reflow
  • AEC-Q200 Qualified
  • Passes ASTM-B809 antisulfuration testing


  • Car electronics
  • Power supply
  • Industrial equipment
  • Agriculture
  • DC-DC converter
  • Battery management

Chip Resistors

  • ZERO OHM – RK73Z

KOA Speer provides chip resistors that are small enough for handheld devices and powerful enough for the automotive industry. The RK73Z zero Ohm jumper thick film chip resistor has a silver element. Available in 0.5, 1, 2, and 5% tolerance.


  • Products with lead-free terminations meet EU RoHS requirements, EU RoHS regulation is not intended for Pb-glass contained in electrode resistor element and glass.
  • AEC-Q200 Qualified


  • Car electronics
  • Medical equipment
  • Power supplies
  • Home appliances
  • Ecology and energy savings smart meter technology
  • Communications (smartphones and tablets)

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.

IRC / TT Electronics

We design and manufacture resistors and precision resistor networks. We are recognized as an innovative leader in the design, development, and manufacturing 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!

NIC Components

NIC Components Corp., a leader in passive component technologies, has been manufacturing and designing passive components for over thirty five years. From a core business of Aluminum Electrolytic Capacitors, NIC has expanded its product offering to Capacitors, Resistors and Inductors with a growing line of specialty devices including Circuit Protection, Lighting and RF Components. NIC maintains engineering, sales and warehousing globally to oversee our production facilities and work closely with the factory sites for quality assurance and best in class customer support.

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.