Metal Plate Power Shunts - Automotive

KOA Corporation
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For high current applications, KOA has now expanded its existing power shunt series by adding the new PSJ2/PSL2 (2 terminals) and PSG4/PSF4 (4 terminals) series. Constructed using a solid metal alloy resistance element with copper terminals the devices provide superior corrosion and heat resistance, along with excellent pulse resistance.The new shunt resistors are ideal for accurate high current sensing in automotive, industrial and pulse applications.


Shunt resistors are used to measure or sense electric current. When using a current-shunt resistor it is important to keep the resistance value as small as practically possible to keep the voltage drop and power dissipation low. For very high currents KOA Europe GmbH introduces its new PSJ2/PSL2 and PSG4/PSF4 metal plate power shunts.

KOA's PS series are ideal for high current measurements up to 244A (PSJ2; 0.2 mΩ; 12 W). The rated power dissipation is 10 W for 0.5 mΩ versions and 8 W for 1 mΩ types at a maximum +75 °C terminal part temperature. The full copper construction of the terminals ensures good heat stress and excellent temperature cycling characteristics. With a resistance tolerance of ±1 % and a T.C.R. of ±50/±75 ppm/K, these PS type resistors allow very accurate high current measurements.

For applications which need a more precise measurement and an excellent T.C.R., the PSG/PSF with its 4-terminal Kelvin configuration should be used.


  • PSJ2: 2 terminal, 3920 inch, 244A (0.2mΩ) to 54A (2mΩ)
  • PSL2: 2 terminal, 2512 inch, 163A (0.3mΩ) and 126A (0.5mΩ)
  • PSG4: 4 terminal, 2725inch, 141A (0.5mΩ) and 89A (1mΩ)
  • PSF4: 4 terminal, 1216inch, 100A (0.5mΩ) and 54A (1mΩ)
  • 2 terminal or 4 terminal construction
  • Ultra-low resistance, suitable for large current detection
  • Excellent long-term stability and pulse withstanding performance
  • Robust copper terminations
  • Low inductance
  • Operating temperature range: -65°C to +175°C
  • EU-RoHS compliant
  • AEC-Q200 qualified


  • High current automotive applications (ECU, EPS, motor control, EV/HEV)
  • DC / DC converter
  • Inverter power supplies
  • Frequency converters
  • Intelligent power modules
  • Battery Management