Resistor Measures Battery Current Accurately In Gas/Diesel/Electric Vehicles


Vishay has unveiled a new automotive battery shunt resistor that offers a 36 W power capacity in the 8518 case size. Its extremely low resistance values down to 50 µΩ lead to improved accuracy and lower costs compared to Hall Effect current sensing solutions, while the tin plating assists with PCB mounting and provides increased protection against corrosion, according to the firm.

The AEC-Q200 qualified device produces extremely low resistance values of 50 µΩ, 100 µΩ, 125 µΩ, and 250 µΩ. These low values will allow for more accurate data to determine battery charge and discharge, thus helping designers meet specific customer battery management requirements for applications in gas, diesel, hybrid, and electric cars and trucks, as well as electric forklifts and other heavy industrial applications.

The WSBS8518…14 features a solid metal manganese-copper alloy resistive element with low TCR (± 20 ppm/°C), and an all-welded construction.

Other specifications of the resistor include low inductance values of < 5 nH, low thermal EMF down to < 1 µV/°C, and an operating temperature range of -65 °C to +170 °C. The device is RoHS-compliant, halogen-free, and Vishay Green.


Samples and production quantities of the WSBS8518…14 are available now, with a lead time of 8 to 10 weeks for larger orders.

For further details, view the full Press release.

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