Product Type: Current Sense

Current Sense/Shunt

  • THICK FILM – UR73/ SR73

KOA Speer offers a complete family of Current Sense Resistors capable of sensing large to small currents with ultralow resistance down to 0.2mΩ. The large current sensing PS series provides high power ratings with ultralow resistance, as low as 0.2mΩ. The TLR series offers a more even thermal distribution of heat and enhanced reliability. The thick film UR73/SR73 offers low resistance values from 0.15Ω to 10mΩ with a power rating of up to 2W. The wide terminal WU73 combines high reliability and performance with a T.C.R of ±75-100 x10-6 k and a resistance tolerance of 1%.


  • Large current, high precision
  • High reliability
  • Metal plate resistive element
  • Low resistance
  • Mold package
  • AEC-Q200 Qualified


  • Car electronics
  • Personal computing devices
  • AC-Adapter and DC-to-DC conversion
  • Current detection in ECU
  • Power supplies



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

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.

NCSR/NCST Series – Current Sensing Chip Resistors

Low ohmic, precision current sensing resistors. NCSR series uses temperature stable precision conductor construction, NCST uses low cost thick film construction. Supplied on tape and reel for automatic pick and placement. Precision resistance values from 0.5 milliohm (0.0005 ohm) to 1000 milli-ohm (1.0 ohm) are available in tolerances from +/-1% (F) ~ +/-5% (J). TCRs (resistance temperature coefficients) cover range from +/-50PPM/°C ~ +/-600PPM/°C. Industry standard case sizes from 0402 ~ 2512 with power ratings of 0.050W (1/2W) to 3.0W. Wrap around terminations with nickel barrier and tin finish are compatible with tin-lead and lead-free soldering processes.


  • Current sensing
  • POL converters
  • LDO regulators
  • VRMs
  • Battery powered devices
  • Circuit Protection
  • Motor Controllers
  • Switching Power Supplies
  • Charger/Adapters


Ultra precision current sensing chip resistors offering size from 0603 through 4527 in power ratings from 0.33W up to 5W.  Resistance range from 0.25 milliohm to 120 milliohm, in tolerances as low as 0.5%, and TCR as low as 15 ppm.  Excellent long term environmental and electrical stability.  AEC compliant.

Metal Foil on Ceramic Chip Resistors

MFC4320 is a metal foil on ceramic chip resistor in 4,320 sizes with values from 2 to 50mΩ, aimed at current sense applications. The high power rating of 5W means that this is ideal for highly compact current sensing in the 1 to 50A range.


  • High power 5W
  • High-stability foil on ceramic
  • Values R002 to R05 at 1% tolerance
  • TCR down to ±30ppm/°C
  • Low temperature rise


  • Power supplies
  • DC-DC converters
  • Motor converters
  • HVAC systems
  • Lighting drivers

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.