Shunt resistors save space and simplify designs increasing accuracy

Vishay Intertechnology, Inc. has introduced a new series of AEC-Q200 qualified Power Metal Strip shunt resistors with industry-low TCR down to ±10ppm/C. Vishay Dale WSBE series devices offer extremely low resistance values down to 15µOhm and high power ratings to 50W for automotive, energy, industrial, and space applications.

The ultra-low TCR performance of the devices results from a combination of the solid metal resistive element and patented TCR mitigation technology. This unique design results in a mitigated TCR while eradicating the necessity for temperature compensation and simplifying the calibration needed for a two-point process. It also simplifies the compensation software required and decreases the number of components necessary to account for temperature shifts, which saves space and simplifies designs and product development to lower costs and increase accuracy.

Offered in the 8518 and 8536 case sizes, the series devices feature a proprietary processing technique that delivers extremely low resistance values. Combined with high power ratings and lifetime stability of 1%, the result is a high current resistor that can handle up to 1825A with no noticeable resistance shift.

The WSBE series is designed for current measurement in BMS, which helps eliminate the need for temperature sensing and software calibration during production. The devices are ideal for charging infrastructure for EV and HEV vehicles such as golf carts and motorcycles. Further applications include energy monitoring and metering systems, large battery systems, battery backup for UPS, inverters for industrial motor drives and tools, and satellites.

Featuring an all-welded construction, the resistors offer low inductance values of <5nH, low thermal EMF down to <1.25µV/C, and an operating temperature range of -65C to +170C. The devices are RoHS-compliant, halogen-free, and Vishay Green.