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Littelfuse Launches New Current Sensing Resistor Family for Automotive and Consumer Electronics Markets

Provides overcurrent protection, current monitoring, and control of critical electronics

CHICAGO, July 18, 2023 —  Littelfuse, Inc.(NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, and safer world, announced the launch of its new Current Sensing Resistor (CSR) family. These new CSRs offer a more cost-effective solution for measuring current within circuits, enabling voltage monitoring, control, and power management of functions such as battery charging and motor speed, while also providing overcurrent protection. View the video.

The Current Sensing Resistors Series is a game changer for both automotive and consumer electronics markets and are ideal for numerous applications, including:

  • Automotive electronics
  • Electric vehicles, including 2- and 3-wheelers
  • Home appliances
  • Consumer electronics
  • Industrial automation

Our customers include industry leaders in automotive and consumer electronics, who require precise current and voltage monitoring for their advanced technologies

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Stephen Li, Product Manager at Littelfuse

To address these needs, the CSR family provides a more cost-effective solution than competing technologies like Hall Effect sensors, current transformers, flux gate sensors (DC only), and Rogowski coils (AC only). Additionally, CSRs work in AC and DC circuits without requiring additional power or equipment to enable measurement.

Stephen Li, Product Manager at Littelfuse

The CSR Series offers the following key benefits:

  • Cost-effective, compact solution
  • Current measurement
  • Voltage monitoring
  • Power control
  • Overcurrent protection

The new Littelfuse CSR family of products extends the company’s circuit protection solutions portfolio, deepening its current and voltage monitoring focus. Each of the eight CSRs is either a metal foil, metal strip, or metal plate resistor used for measuring currents in circuits due to its high precision and low resistance rating.


The Current Sensing Resistors (CSR) Series are available in tape-and-reel quantities of 5,000. Place sample requests through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

For More Information

Additional information on the latest series release is available on the Current Sensing Resistors (CSR) Series product page. For technical questions, please contact Stephen Li, Product Manager, SLi2@littelfuse.com.

About Littelfuse

Littelfuse is a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 20 countries, and with approximately 18,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets—everywhere, every day. Headquartered in Chicago, Illinois, United States, Littelfuse was founded in 1927. Learn more at Littelfuse.com.

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