HSN Series Automotive Current Sensors

LEM HSN series sensors are engineered for the precise electronic measurement of DC, AC, or pulsed currents in high-power, low-voltage automotive systems. With galvanic isolation between the high-power primary circuit and the electronic secondary circuit, the HSN series ensures safe and efficient integration into demanding automotive environments. Designed with a compact form factor and featuring an integrated busbar for nominal currents up to ±1000 A, these sensors are ideal for advanced battery management system (BMS) and motor control applications, where space, reliability, and performance are critical.

A standout feature of the HSN series is its flexibility, offering multiple current measuring ranges within a single housing. This versatility allows manufacturers to streamline designs without compromising performance. Within the HSN family, the HSNBV is specifically optimized for BMS applications, while the HSNDR is tailored for motor control, addressing the unique demands of each function. Operating on open-loop Hall effect technology, this series delivers accurate, contactless current sensing, making it a trusted solution for automotive power systems.