Powerelectronics 3655 065047 Powertron

Current Sensing COTS Resistors with Power Ratings to 2500 W

Sept. 11, 2015
Powertron, a Vishay Precision Group Inc. (VPG) brand, has announced the expansion of its S-Line of precision foil current sense resistors with five new SHR series devices.

Powertron, a Vishay Precision Group Inc. (VPG) brand, has announced the expansion of its S-Line of precision foil current sense resistors with five new SHR series devices. Offered in a wide range of anodized aluminum package sizes, the SHR 4-8065, SHR 4-80110, SHR 4-80216, SHR 4-80320, and SHR 4-80370 combine a low TCR of ±2ppm/K with extremely high power ratings to 2500 W.

With load stability to 0.1% for up to 1,000 hours, the RoHS-compliant devices provide highly accurate and reliable current sensing in industrial power supplies, digital multimeters, current control systems, medical equipment, solar and wind inverters, and AC/DC converters, as well as systems such as battery chargers and test equipment for electric cars.

The resistors offer a wide range of power ratings -- from 24 W in free air to 2500 W when mounted on a heatsink -- with low resistance values from 0.005 to 300W and tolerances to ±0.1%. The devices feature maximum currents to 60 A (with higher values and currents available upon request), very low inductance of <50 nh, thermal EMF of <1 microvolts/°C, and a temperature range of -40°C to +130°C.

Samples and production quantities of the SHR 4-8065, SHR 4-80110, SHR 4-80216, SHR 4-80320, and SHR 4-80370 resistors are now available, with lead times of four to five weeks. Pricing for U.S. delivery starts at $45 per piece in 100-piece quantities. 

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