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Bourns offers high power shunt resistors manufactured using a metal alloy element that is electron-beam welded to tinned copper terminals. The Bourns® Model CSM Series is available in three different footprint sizes: 8518, 7036, and 6918 metric, with resistance values as low as 50 µΩ, meeting low voltage drop and high-accuracy requirements with the ability to handle high currents up to 1000 A and permanent power ratings of up to 50 W.
The Model CSM Series is AEC-Q200 compliant with a high pulse power rating. The metal alloy current sensing element allows thermal EMF as low as 0.25 µV/K and a low TCR of 50 PPM/° which our customers find particularly well-suited for automotive applications with high temperature fluctuation.
Bourns® Model CSM high power current sense shunts are ideal for battery management system applications. Proper battery management requires the continuous monitoring of current flow through the electrical circuit. Monitoring the status of the battery is essential in automotive and other market segments where rechargeable batteries are used. Using Bourns® CSM Series for battery management provides a very accurate and cost-effective method to meet these needs.
Upon request, Bourns can offer customized parts to meet a customer’s required shape, mechanical and electrical characteristics. Additional percussion welded current sense pins are available in order to connect current sense resistors properly to the circuit board. Keeping current sense traces/wires as short as possible between the shunt and current measurement chipset is very important for measuring accuracy. That is why Bourns supports customers with pre-assembled modules integrating shunts into a circuit board which can include additional components such as connector headers and NTC thermistors, based on customer request.
All Bourns® components approved for typical automotive applications are manufactured in facilities that are fully certified to TS 16949, and have been tested, qualified using the AEC-Q standard for passive components and presented to the customer for selection and approval using PPAP. Bourns also offers customers access to our application test lab.
Bourns has a long history of serving the automotive market with quality products. With excellent customer service and the availability of field application engineers, Bourns works closely with automotive system designers to help customers with layout support and making modifications as requested by customer. Bourns performs surge tests and offers application and customer-specific testing.
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
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