Wirewound fixed resistors support high-temperature and high-voltage operation

Bourns has introduced two new low thermal resistant ceramic core wirewound resistor series. The axial-lead resistor families offer designers an effective circuit conditioning solution for applications that have particularly high temperature and voltage requirements and operate in harsh environmental conditions. Coated in a material that meets the UL 94V-0 standard, the W and WS Series fixed resistors offer E24 resistance values and are designed to operate at extreme temperatures from -55C to +200C. The parts meet the circuit-conditioning needs of a broad range of industrial and consumer applications such as smart meters, white goods, power supplies, instruments / gauges, lighting and renewable-energy systems. The W Series features a wide power range from 1W to 10W and provides resistance values ranging from 15ohm to 150ohm. It is designed to withstand the surge from the 1.2/50µs voltage waveform described in IEC 61000-4-5. The WS Series has a power range of 1W to 8W and a resistance range of 15ohm to 3.3kohm, says the company. “We specifically introduced the additions to our circuit conditioning product portfolio so our consumer and industrial electronic customers can meet ongoing application requirements for high temperature stability, enhanced power handling capabilities along with low resistance values,” said Brian Ahearne, product line manager, Bourns, Inc. “These new families also complement the other circuit conditioning components offered by Bourns that include PTC resettable fuses, power inductors, rectifier diodes and Zener diodes.”