• 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


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)

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Dimensions 21 x 70 x 60mm
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RARA HPS Series Technical Library

RARA HPS Series Resources

Product Datasheet