High performance dual phase automotive current sensor +/- 500A

LWSR - Automotive current sensor

The LWSR family is used for DC, AC, or pulsed currents measurement with galvanic separation between the primary circuit and the secondary circuit.

LWSR sensors are designed with an aperture to insert the primary conductors.

The LWSR current sensors operate based on the closed-loop Hall effect principle. This technology ensures accurate and reliable current measurements in various applications where these sensors are utilized. LWSR sensors are suitable for industrial applications.

LWSR – Features and benefits

LWSR automotive current sensor


  • Closed loop multi-range current sensor
  • Voltage output
  • Unipolar supply voltage

Main characteristics

  • Very low offset drift
  • Very good du/dt immunity

Typical applications

The LWSR family of sensors is specifically engineered for industrial applications and proves highly versatile, finding effective use in a variety of scenarios within this domain, including:

  • Solar inverters
  • AC variable speed and servo motor drives
  • Battery supplied applications
  • Uninterruptible Power Supplies (UPS)
  • Switched Mode Power Supplies (SMPS)
  • Power supplies for welding applications

LEM LWSR – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
LWSR 250-P


250 A 5 to 5 -40 to 105°C


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