Date: 13/02/2012

SMT shunt resistor for wattmeters

Vishay has announced a new 3 Watt shunt resistor in the 3124 size package with extremely low resistance values down to 100 micro ohms. 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 75 ppm/°C).

The WSMS3124 meter shunt resistor features a proprietary processing technique that produces extremely low resistance values from 100 micro ohms to 750 micro ohmms.

The WSMS3124 offers very low inductance values of < 0.5 nH and a low thermal EMF of < 3 µV/°C. The device is lead (Pb)-free and RoHS-compliant.

Samples and production quantities of the new meter shunt resistor are available now, with a lead time of eight to 10 weeks for larger orders.