Electronic Design
Wirewound Resistors Flaunt 12-kV Surge Withstand Capability

Wirewound Resistors Flaunt 12-kV Surge Withstand Capability

A series of axial-cemented wirewound resistors offer a customized high-voltage surge withstanding capability up to 12 kV—a first, according to developer Vishay Intertechnology. The maximum allowed surge-handling capacity depends on the resistor model and ohmic value. The Z300-C series Draloric devices feature non-flammable cement coatings and high-grade ceramic cores to boost safety in overload conditions. Power rating ranges from 1 to 6 W at an ambient temperature of 40°C and 0.9 to 5.4 W at 70°C. Resistance ranges from 0.15 Ω to 10 kΩ (with other values available on request), with resistance tolerances of ±5% and ±10%. Temperature coefficient is ±200 ppm/K (±400 ppm/K for resistance values below 1 Ω).


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