LAH Series

DC, AC pulse currents' measurements of 8, 12, 25, 50, 100 & 125 ARMS nominal with galvanic isolation

LAH - Current sensors

The LAH product family is designed to facilitate the measurement of DC, AC, and pulse currents with nominal values of 8, 12, 25, 50, 100, and 125 ARMS, providing galvanic isolation.

LAH current sensors offer impressive features, including excellent accuracy, rapid response times, a compact design, and an integrated primary conductor. These transducers are specifically designed for PCB mounting, both for the primary and secondary circuits.

The LAH 25-NP part introduces additional versatility with its ability to manage multi-ranges. 

The LAH current sensor family operates on closed-loop Hall effect technology, ensuring reliable and accurate current measurements in industrial applications.

LAH – Features and benefits

LAH current sensors

Main characteristics

  • Closed loop (compensated) current transducer using the Hall effect
  • Printed circuit board mounting
  • Insulating plastic case recognized according to UL 94-V0 (excepted on LAH 125-P)


  • Excellent accuracy
  • Very good linearity
  • Low temperature drift
  • Optimized delay time
  • Wide frequency bandwidth
  • No insertion losses
  • High immunity to external interference
  • Current overload capability

Typical applications

LAH sensors, with their capability to measure DC, AC, and pulse currents, find common usage in various industrial applications. Some examples of these applications include:

LEM LAH – Download & Technical Characteristic

ProductDocumentPrimary nominal RMS voltageSupply Voltage rangeOp. Temperature
LAH 25-NPDatasheet
8 A, 12 A, 25 A12 to 15-25 to 85°C
LAH 50-PDatasheet
50 A12 to 15-25 to 85°C
LAH 50-P/SP1Datasheet50 A12 to 15-25 to 85°C
LAH 100-PDatasheet
100 A12 to 15-25 to 85°C
LAH 125-PDatasheet
125 A12 to 15-40 to 85°C


Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

Contact Us