Powertron is a VPG brand, dedicated to the development and manufacture of High Precision Foil, Current Sense and Thick Film resistors for use in diverse technologies. Powertron offers a full complement of resistors needed in accurate, precise and high power circuits. Powertron products can be found in medical, aerospace, military, high-precision and general industrial applications.
Powertron’s expanded range of precision foil current sense resistors has five new SHR series devices that are available from Charcroft Electronics. Offered in a range of anodized aluminium package sizes, the made-in-Germany 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 2,500W. Offering load stability to 0.1% for up to 1,000 hours, the RoHS-compliant resistors can be used to provide current sensing in industrial power supplies and current control systems, as well as systems such as battery chargers and test equipment for electric cars. Power ratings range from 24W in free air to 2,500W when mounted on High-power low-TCR foil resistor for power control a heatsink, with resistance values from 0.005Ω to 300Ω and tolerances to ±0.1%. The devices feature maximum currents to 60A (with higher values and currents available upon request), very low inductance of <50nh, thermal EMF of <1μV/°C, and a temperature range of -40°C to +130°C.