For the electronic measurement of currents: DC, AC, pulsed... with galvanic separation between the primary circuit and the secondary circuit.

HAC - Current sensors

The HAC family is composed of compact current sensors for AC and DC currents from 200 to 800A. They are designed for industrial applications.

These sensors benefit from instantaneous voltage output of +/- 4 V., a bipolar power supply of +/- 15 V and a bandwidth of DC 50 kHz.

HAC current transducers are based on the open loop Hall effect technology.

HAC – Features and benefits

HAC current sensors

Main characteristics

  • Hall effect measuring principle
  • Insulating plastic case recognized according to UL 94-V0


  • Low insertion losses
  • Easy installation
  • Low power consumption
  • Small size and space saving
  • Only one design for wide current ratings range
  • High immunity to external interference

Typical applications

HAC current sensors are commonly used in industrial applications:

  • AC variable speed drives and servo motor drives
  • Static converters for DC motor drivers
  • Battery supplied applications
  • Uninterruptible Power Supplies (UPS)
  • Switched Mode Power Supplies (SMPS)
  • Power suppliers for welding applications

LEM HAC – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
HAC 200-S


200 A 15 to 15 -10 to 80 °C
HAC 300-S


300 A 15 to 15 -10 to 80 °C
HAC 400-S Datasheet
400 A 15 to 15 -10 to 80 °C
HAC 600-S Datasheet 600 A 15 to 15 -10 to 80 °C
HAC 800-S Datasheet
800 A 15 to 15 -10 to 80 °C


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