Compact current sensors for AC and DC currents from 100 to 1000 ARMS nominal

HTA - Current sensors

The HTA current sensor family is purpose-built for the precise measurement of DC, AC, or pulsed currents while maintaining galvanic isolation between the primary and secondary circuits.

Current sensors of the HTA family operate efficiently with a bipolar power supply of +/- 15V. They provide an instantaneous voltage output of +/- 4V and offer a bandwidth reaching up to DC 50 KHz.

These sensors are designed with a round aperture for current measurement and are founded on open-loop Hall effect technology, rendering them particularly suitable for a wide array of industrial applications.

HTA – Features and benefits

HTA current sensors


  • Open loop transducer using Hall effect
  • Panel mounting-Horizontal or Vertical
  • Insulating plastic case recognized according to UL 94-V0

Main characteristics

  • Very good linearity
  • Very good accuracy
  • Low temperature drift
  • Wide frequency bandwidth
  • Very low insertion losses
  • High immunity to external interference
  • Current overload capability
  • Low power consumption

Typical applications

The HTA sensors are tailor-made for the industrial domain, and they can be effectively employed in a variety of applications, including:

LEM HTA – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
HTA 100-S


100 A 15 to 15 -25 to 85°C
HTA 200-S


200 A 15 to 15 -25 to 85°C
HTA 250-S/SP3 Datasheet 250 A 15 to 15 -25 to 70°C
HTA 300-S Datasheet 300 A 15 to 15 -25 to 85°C
HTA 400-S Datasheet 400 A 15 to 15 -25 to 85°C
HTA 500-S Datasheet 500 A 15 to 15 -25 to 85°C
HTA 500-S/SP4 Datasheet 500 A 15 to 15 -25 to 70°C
HTA 600-S Datasheet 600 A 15 to 15 -25 to 85°C
HTA 1000-S Datasheet 1000 A 15 to 15 -25 to 85°C
HTA 1000-S/SP9 Datasheet 1000 A 15 to 15 -25 to 70°C


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