Littelfuse, announced the release of six new automotive-qualified open-loop Hall-effect current sensors with analog or digital outputs for electric and hybrid vehicles.
The sensors provide isolated current measurement in battery-management, motor-control, and pyro-fuse safety systems. They use open-loop Hall-effect technology in compact, bus-bar-mounted form factors. Outputs include analog-voltage and digital CAN/LIN communication.
Nominal current ranges reach up to ±1500 A. Models with CAN 2.0B include AUTOSAR E2E Profile 1A diagnostics and ASIL-C-capable measurement.
Product families:
Battery-management sensors: CH1B02xB, CH1B032B, CH1B040B – analog or CAN-based measurement up to ±1500 A for BMS, dc link, and HV junction boxes.
Motor-control sensors: CH1B02xM, CH1P01xM – ratiometric-analog devices up to ±1500 A (±900 A for CH1P01xM) for inverter applications.
Pyro-fuse trigger module: CH1B050P – direct pyro-fuse activation within microseconds.
Applications include battery management systems, motor inverters, HV junction boxes, power relay assemblies, starter generators, dc/dc and ac/dc converters, and pyro-fuse and battery disconnect modules.
The sensors complement Littelfuse high-voltage circuit-protection and power-control components, including fuses, contactors, thyristors, and TVS diodes.
The sensors are busbar- or PCB-mounted with standard automotive connectors and protocols. Analog models provide ratiometric voltage signals. Digital models use CAN or LIN with diagnostics. The CH1B050P detects overcurrent and activates pyro-fuse over three times faster than conventional paths.
