High performance dual phase current sensor +/- 500A. Suitable for high power motor control and inverter applications, with high integration

HAH2 - Automotive current sensors

The HAH2 family is a dual-phase sensor for DC, AC, or pulsed currents measurement in high power and low voltage automotive applications. It offers a galvanic separation between the primary circuit (high power) and the secondary circuit (electronic circuit).

The HAH2 family gives you a choice of having different current measuring ranges in the same housing (from ±100 up to ±500 A).

The HAH2 automotive current sensors are designed on the open loop hall effect technology.

HAH2 – Features and benefits

HAH2 automotive current sensors


  • Open Loop transducer using the Hall effect sensor
  • Low voltage application
  • Unipolar +5 V DC power supply
  • Primary current measuring range up to ±300 A
  • Maximum RMS primary admissible current: limited by the busbar, the magnetic core or ASIC T < +150 °C
  • Operating temperature range: −40 °C < T < +125 °C
  • Output voltage: fully ratio-metric (in sensitivity and offset)

Main characteristics

  • Excellent accuracy
  • Very good linearity
  • Very low thermal offset drift
  • Very low thermal sensitivity drift
  • Wide frequency bandwidth
  • No insertion losses
  • Very fast response time

Typical applications

The HAH2 automotive sensors are purposefully engineered for demanding high-power motor control and inverter applications. These applications include but are not limited to:

  • Starter Generators
  • Inverters
  • HEV applications
  • EV applications
  • DC / DC converters

LEM HAH2 – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
HAH2DR 300-S00


300 A 5 to 5 -40 to 125°C
HAH2DR 500-S00


500 A 5 to 5 -40 to 125°C


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