• RARA

Product Features

  • 4-terminal shunt resistor
  • Resistance range from 0.001Ω to 0.1Ω
  • Tolerances of ±0.05% to ±1%
  • TCR of ±3 and ±5 ppm/°C
  • Power rating of 250W (on a suitable heat sink)
  • Temperature range from -55°C to +100°C


  • Power Control
  • Scientific Instrumentation
  • Test and Measurement


The HPS high power precision 4-terminal shunt resistor series from RARA offers a power rating of up to 250W on a suitable heat sink, with a maximum current limit of 387A (resistance value of 1mΩ). The HPS series is available with resistance values from 1mΩ to 100mΩ, tolerance options as low as ±0.05% and a maximum TCR of ±5 ppm/°C. Excellent short stability as low as ≤±0.02% at maximum current load for 1 hour and long term stability of ≤±0.2% after 1,000 hours.

  • 4-terminal shunt resistor
  • Temperature range of -55°C up to +100°C
  • Maximum rated power of 250W (≤ +60°C)
  • Resistance options of 1mΩ, 2mΩ, 5mΩ, 10mΩ, 20mΩ, 50mΩ and 100mΩ
  • Tolerances options of ±0.05% (A), ±0.1% (B), ±0.5% (D) and ±1% (F)
  • Maximum working current of 387A at 1mΩ
  • Dielectric withstanding voltage of 500V AC for 60 seconds at a maximum leakage current of 2mA
  • TCR options of ±3 ppm/°C or ±5 ppm/°C
  • Short-term stability ΔR ≤±0.02%, ≤±0.03%, ≤±0.05% or ≤±0.1% for 1 hour at terminal & copper flange temperature ≤+60°C
  • Long-term Stability ΔR ≤±0.2% after 1,000 hours at terminal & copper flange temperature ≤+60°C

Typical applications for the HPS series include:

  • Current sensing
  • Battery management
  • Charge/discharge test equipment
  • Laboratory power supplies


RARA HPS Series Specification Table

Temperature range-55°C to +100°C
Rated power250W (on a suitable heatsink)
Resistance values1mΩ / 2mΩ / 5mΩ / 10mΩ / 20mΩ / 50mΩ / 100mΩ
Tolerance±0.05% (A) / ±0.1% (B) / ±0.5% (D) / ±1% (F)
Maximum working current387A (at 1mΩ)
TCR±3ppm/°C / ±5ppm/°C
Dielectric withstanding voltage500V AC for 60s (Max. leakage current 2mA)
Short-term stabilityΔR ≤±0.02% / ≤±0.03% / ≤±0.05% / ≤±0.1% (for 1hr at terminal & copper flange temperature ≤+60°C)
Long-term stabilityΔR ≤±0.2% (after 1,000hrs at terminal & copper flange temperature ≤+60°C)


Dimensions 21 x 70 x 60mm
Product Type

Series / Model

Package / Size

Resistance Value

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Current Rating


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Temperature Range (°C)

RARA HPS Series Technical Library

RARA HPS Series Resources

Product Datasheet


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Please be advised that due to the ongoing supply issues with raw materials affecting the global electronics industry, as well as an increase in orders received by our manufacturing partners, a large number of products are facing increased lead times in recent months. For the latest lead time and stock availability, please contact one of our engineers who will be happy to discuss lead times further and the potential for alternative parts.