MALVERN, Pa. — June 10, 2015 — Vishay Intertechnology, Inc. introduced a new series of silicone-coated axial lead wirewound resistors. Providing superior short-term energy surge protection compared with standard wirewound devices, Vishay Dale CW – High Energy series resistors can also be utilized in high-temperature operating conditions up to +350 °C.
CW – High Energy resistors provide higher overload and high surge energy protection than traditional wirewound resistors, and they exceed IEC 61000-4-5 (1.2 µs/50 µs) requirements for communication equipment, 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 °C to +250 °C (characteristic U) and -65 °C to +350 °C (characteristic V).
The compact resistors provide high power ratings from 3 W to 13 W at +25 °C and 2,000-hour load-life stability of less than ± 3 % at +25 °C. The devices offer resistances from 2 Ω to 938 kΩ, with tolerances of ± 5 % and ± 10 %, and TCR of ± 50 ppm/°C for resistance from 2.0 Ω to 9.9 Ω, and ± 30 ppm/°C for resistance of 10 Ω and above.
The CW – High Energy series is available with both lead (Pb)-free and tin/lead terminations.
