Tiny resistor packs power with low resistance

Vishay Intertechnology Inc.'s latest Power Metal Strip meter shunt resistor combines a 3 W power capability in the 3124 size package with low resistance values down to 100 µΩ.

The WSMS3124 allows placement of an electron-beam welded shunt in electrical wattmeters. The design also incorporates a physical shape that results in low TC characteristics (down to 75 ppm/°C).

The WSMS3124 meter shunt resistor features a proprietary processing technique that produces low resistance values from 100 µΩ to 750 µΩ. These values allow for increased accuracy in current meter shunt applications for industrial and consumer single- or multiphase energy meters. With a tolerance of 5.0 %, the WSMS3124 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. It offers 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. 

Pricing: For U.S. delivery only is $1.50 each in 50,000-piece quantities.

Availability: Samples and production quantities are available now, with a lead time of eight to 10 weeks for larger orders.

Datasheet: Click here.