Vishay – New 3124 shunt resistor Features values down to 100uohm and 3W capability (Vishay shunt WSMS3124 resistor)

Latest from Vishay, is a new Power Metal Strip meter shunt resistor that combines a 3W power capability in the 3124 size package with extremely low resistance values down to 100uohm. The WSMS3124 allows placement of an electron-beam welded shunt in electrical wattmeters. The design also incorporates a physical shape that results in very low TC characteristics (down to 75ppm/C).

The WSMS3124 meter shunt resistor features a proprietary processing technique that produces extremely low resistance values from 100uohm to 750uohm. These values allow for increased accuracy in current meter shunt applications for industrial and consumer single- or multiphase energy meters. With a tolerance of 5%, the new resistor provides power companies with more accurate data to determine customer usage and to adjust billing terms.

The WSMS3124 features a five-terminal connection design and an all-welded construction that contributes to its superior electrical performance. The resistor offers very low inductance values of < 0.5nH and a low thermal EMF of < 3uV/C. The device is lead (Pb)-free and RoHS-compliant, says the company.