Six new automotive current sensors have been released by Littelfuse with the goal of improving the efficiency, performance, and functional safety of electric and hybrid vehicles.
For battery management, motor control, and pyro-fuse safety systems, the new Littelfuse Automotive Qualified Sensors offer accurate, isolated current measurement.
The sensors provide reliable performance in compact, bus-bar-mounted form factors by using open-loop Hall-effect technology. Analog-voltage and digital (CAN/LIN) communication are examples of output types that provide system designers options in integrating with current EV architectures.
Engineers must meet increasing expectations for high accuracy, quick response times, and adherence to functional-safety standards as EV and hybrid systems develop.
By providing scalable, ASIL-capable solutions that streamline design while enhancing efficiency, safety, and overall system reliability, this new current-sensor family assists OEMs and Tier 1 suppliers in overcoming those obstacles.
Product Families and Key DifferentiatorsÂ
- Battery-Management Sensors – CH1B02xB, CH1B032B, CH1B040B
High-accuracy analog or CAN-based current measurement up to ±1500 A for BMS, DC link, and HV junction boxes.
- Motor-Control Sensors – CH1B02xM, CH1P01xM
Compact, low-noise, ratiometric-analog devices up to ±1500 A (±900 A for CH1P01xM) supporting fast-switching inverter applications.Â
- Pyro-Fuse Trigger Module – CH1B050P
Intelligent, fast-response design directly triggers the pyro-fuse within microseconds—more than three times faster than conventional architectures.Â
High-Accuracy, Scalable Design
Across the Automotive Qualified product family, nominal current ranges extend up to ±1500 A, with best-in-class total-error performance and minimal thermal drift.
Models featuring CAN 2.0B communication include AUTOSAR E2E Profile 1A diagnostics and ASIL-C-capable current measurement, enabling integration into safety-critical systems such as battery control or disconnect units.
Applications
- Battery management systems (BMS)
- Motor inverters
- HV junction boxes
- Power relay assemblies
- Starter generators
- DC/DC and AC/DC converters
- Pyro-fuse and battery disconnect modules
Complementary System Integration
Littelfuse current sensors complement its portfolio of high-voltage circuit-protection and power-control components—including fuses, contactors, thyristors, and TVS diodes—to create complete system-level solutions for electric- and hybrid-vehicle design.
Availability
Sample requests can be submitted through authorized Littelfuse distributors worldwide.
For a listing of Littelfuse distributors, Click Here.
Additional information is available on the Automotive Qualified Current Sensors product page.
