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Vishay Intertechnology CW…HS Axial Lead Wirewound Resistors Offer Reliable High-Temperature Surge Voltage Protection

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Vishay Intertechnology, Inc. (NYSE:VSH) today introduced a new series of silicone-coated axial lead wirewound resistors. Providing superior short-term surge protection compared with standard wirewound devices, Vishay Dale CW – High Surge series resistors combine high voltage surge immunity up to 12 kV with high-temperature operation to +350 ^0C in a high-reliability design.

CW – High Surge resistors provide overload and high surge voltage protection in accordance to IEC 61000-4-5 (1.2 us/50 us) requirements for power supplies, metering and welding equipment, power tools, and appliances in a wide range of applications. The devices offer a rugged, completely welded construction for increased reliability, while their high-temperature silicone coating allows for operating temperature ranges of -65 ^0C to +250 ^0C (characteristic U) and -65 ^0C to +350 ^0C (characteristic V).

The compact resistors provide high power ratings from 1 W to 13 W at 25 ^0C and 2,000-hour load-life stability of less than +/- 3 % at +25 ^0C. The devices offer resistances from 0.1 to 167 k, with tolerances of +/- 3 %, +/- 5 %, and +/- 10 %, and TCR of +/- 90 ppm/^0C for resistance below 0.99 , +/- 50 ppm/^0C for resistance from 1.0 to 9.9 , and +/- 30 ppm/^0C for resistance of 10 and above.

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

Device Specification Table:

Model Power rating P25 ^0C (W) Resistance range ()
Characteristic U +250 ^0C Characteristic V +350 ^0C
CW001…HS 1.0 0.1 to 6.37 k
CW02B…HS 3.0 3.75 0.1 to 15 k
CW005…HS 5.0 6.5 0.1 to 58.5 k
CW010…HS 10.0 13.0 0.1 to 167 k

Samples and production quantities of the CW – High Surge series are available now, with a lead time of eight to 10 weeks for larger orders.

Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world’s largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishays product innovations, successful acquisition strategy, and “one-stop shop” service have made it a global industry leader. Vishay can be found on the Internet at

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Link to datasheets: (CW – High Surge)

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