Battery shunt resistor improves accuracy and provides consistent contact location

Vishay Intertechnology has a new 36W Power Metal Strip battery shunt resistor featuring three sense pins in the 8518 case size. With extremely low resistance values down to 50µohm, the Vishay Dale WSBS8518...40 increases accuracy and lowers costs compared with Hall Effect current sensing solutions, while its sense pins assist in PCB mounting, provide consistent contact point location, and offer a connection to ground via the third sense pin. The three sense pin device released today features a proprietary processing technique that produces extremely low resistance values of 50µohm, 100µohm, and 125µohm. These low values 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, UPS systems, and other heavy industrial applications. The resistors feature a solid metal manganese-copper alloy resistive element with low TCR (±20ppm/C) and a welded terminal to element connection that allows for up to 848A of continuous current (value dependent). The resistor offers low inductance values of <5nH, low thermal EMF down to <1µV/C, and an operating temperature range of -65C to +170C. The device is RoHS-compliant, halogen-free, and Vishay Green.