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Wirewound resistors support operation up to 350∼C

Posted: 12 Jun 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Vishay Intertechnology? wirewound resistor? power supplies? welding?

Vishay Intertechnology Inc. has announced a series of silicone-coated axial lead wirewound resistors. The Vishay Dale CW-High Energy series resistors can be used in high-temperature operating conditions up to 350∼C, and can offer superior short-term energy surge protection compared with standard wirewound devices, stated the company.

The devices promise to deliver higher overload and high surge energy protection than traditional wirewound resistors, and they exceed IEC 61000-4-5 (1.2米s/50米s) requirements for communication equipment, power supplies, metering and welding equipment, power tools and appliances in a range of applications. The wirewound resistors provide a rugged, completely welded construction for increased reliability, while their high-temperature silicone coating allows for operating temperature ranges of -65∼C to 250∼C (characteristic U) and -65∼C to 350∼C (characteristic V).

Vishay Dale CW-High Energy series resistors

The compact resistors provide high power ratings from 3W to 13W at 25∼C and 2,000-hour load-life stability of less than ㊣3 per cent at 25∼C. The devices offer resistances from 2次 to 938k次, with tolerances ㊣5 per cent and ㊣10 per cent, and TCR of ㊣50ppm/∼C for resistance from 2峏 to 9.9次, and ㊣30ppm/∼C for resistance of 10次 and above.

The CW-High Energy series is available with both lead (Pb)-free and tin/lead terminations.

Samples and production quantities of devices are available, with a lead time of six to seven weeks for larger orders.





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