Shunt Resistors Exploit Unique Termination Design

Vishay Intertechnology’s WSBS8518...34 and WSBS8518...35 Power Metal Strip shunt resistors employ a solid metal nickel-chrome alloy resistive element with a calibration notch and "boot" design on their terminals, said to improve TCR performance (down to ± 10 ppm/°C) for better accuracy over temperature extremes. With resistance values down to 100 µΩ and power ratings to 36W, the components increase accuracy and lower costs compared with manganese alloy shunts and Hall Effect current sensing solutions, while the two sense pins of the WSBS8518...35 aid in PCB mounting and provide consistent contact point locations on the shunt.

 

Offered in the 8518 case size, the resistors feature a proprietary processing technique that produces their extremely low resistance values, which allow for high current capabilities. The devices are designed for battery management in gas, diesel, hybrid, and electric cars and trucks, as well as electric forklifts, large UPS systems, and other heavy industrial applications.

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Featuring an all-welded construction, the components offer low inductance values of < 5 nH, low thermal EMF down to < 1.25 µV/°C, and an operating temperature range of -65 °C to +170 °C. The resistors are RoHS-compliant, halogen-free, and Vishay Green. Samples and production quantities of the WSBS8518...34 and WSBS8518...35 are available now, with a lead time of 10 to 12 weeks for larger orders.

 

Pricing is $2.95 each/1,000. For deeper knowledge, peruse the WSBS8518...34 and WSBS8518...35 datasheets.

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