New automotive current sensors for EV systems

EV SAFETY New automotive current sensors for EV systems

2026-01-07 From Littelfuse 1 min Reading Time

Related Vendors

Rogers Corporation

CISSOID S.A.

MERSEN

Littelfuse has announced the release of six new automotive current sensors designed to enhance electric and hybrid vehicle performance, efficiency, and functional safety. The new automotive qualified sensors provide precise, isolated current measurement across battery-management, motor-control, and pyro-fuse safety systems.

A new family of six open-loop hall-effect current sensors delivers accurate, isolated current measurement with analog or digital outputs for next-generation electric and hybrid vehicles.(Source: Littelfuse) — A new family of six open-loop hall-effect current sensors delivers accurate, isolated current measurement with analog or digital outputs for next-generation electric and hybrid vehicles.
(Source: Littelfuse)

As EV and hybrid systems evolve, engineers face growing demands for high accuracy, fast response, and compliance with functional-safety standards. This new current-sensor family helps OEMs and Tier 1 suppliers meet those challenges by offering scalable, ASIL-capable solutions that simplify design while improving efficiency, safety, and overall system reliability.

Utilizing open-loop hall-effect technology, the sensors deliver reliable performance in compact, bus-bar-mounted form factors. Output configurations include analog-voltage and digital (CAN/LIN) communication, giving system designers flexibility in integrating with existing EV architectures.

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.

Product Families and Key Differentiators

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.

Pyro-Fuse Trigger Module: CH1B050P Intelligent, fast-response design directly triggers the pyro-fuse within microseconds—more than three times faster than conventional architectures.

Symbolic image: Automotive taillights featuring advanced backlighting from Diodes' new boost controller (Source: © Kara - stock.adobe.com)

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

Follow us on LinkedIn

Have you enjoyed reading this article? Then follow us on LinkedIn and stay up-to-date with daily posts about the latest developments on the industry, products and applications, tools and software as well as research and development.

(ID:50668000)

Subscribe to the newsletter now

Don't Miss out on Our Best Content

Business E-mail

Please enter a valid mailadress.

By clicking on „Subscribe to Newsletter“ I agree to the processing and use of my data according to the consent form (please expand for details) and accept the Terms of Use. For more information, please see our Privacy Policy.

Declaration of consent

It goes without saying that we treat your personal data responsibly. Where we collect personal data from you, we process the data in compliance with the relevant data protection regulations. More detailed information is available in our privacy policy.

Consent to the use of data for advertising purposes

I consent to the use of my email address to send editorial newsletters by Mesago Messe Frankfurt GmbH, Rotebühlstr. 83-85, 70178 Stuttgart, Germany including all of its affiliates within the meaning of Section 15 et seq. AktG (‘Mesago’). I have viewed lists of each group of affiliates here for the Mesago.
The content of the newsletter covers the products and services of all of the companies listed above including, for example, trade magazines and specialist books, events and exhibitions and event-related products and services, printed and digital media products and services such as additional (editorial) newsletters, competitions, lead campaigns, online and offline market research, technical web portals and e-learning courses. If my personal telephone number has also been collected, it may be used to send offers for the aforementioned products and services from the above companies, as well as for market research purposes.
If I wish to access protected content online on portals of Mesago including its affiliates within the meaning of Section 15 et seq. AktG, I must register with additional data in order to access that content. In return for this free access to editorial content, my data may be used in line with this declaration of consent for the purposes described herein.

Right to withdraw consent

I am aware that I can withdraw this consent at any time with future effect. My withdrawal of consent does not affect the lawfulness of processing performed based on my consent before its withdrawal. If I wish to withdraw my consent, I can send an email to Mesago at privacy@mesago.com. If I no longer wish to receive individual newsletters to which I have subscribed, I can also click on the unsubscribe link at the bottom of a newsletter. I can find more information on my right to withdraw, how to exercise this right and the consequences of my withdrawal in the Privacy policy Editorial newsletters section.