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Wirewound, film resistors withstand up to 275C

Posted: 11 Apr 2007 ?? ?Print Version ?Bookmark and Share

Keywords:power wirewound resistor? film resistor? axial lead resistors?

Wirewound and film resistors from TT electronics IRC WAFT

Providing design engineers with economical power resistors with high-temperature capabilities, TT electronics IRC Wire and Film Technologies Division offers both power wirewound and film resistors for high volume applications. Designated the CAW (wirewound) and CAF (film) series, both resistor types are available for operation at temperatures up to 275C.

"We anticipate these power wirewound and film resistors to gain wide acceptance with contract manufacturers and other high volume users for a wide range of general-purpose applications," said David Winkler, product manager for IRC's wire and film technologies division. "Both types of resistors are enclosed in a flameproof ceramic case with inorganic fill materials, which makes them suitable for operation in extreme temperatures, such as those found in industrial and appliance applications."

Additional applications for the CAW and CAF series resistors include power electronics circuits, voltage dividers, power supplies, and motor controllers.

Both the axial lead resistors feature power ratings of 2-10W. The CAW series offers a resistance range from 0.1 ohm to 1.2 kiloohms, while the CAF series have a resistance range of 28 ohms to 200 kiloohms; standard tolerances for both devices are 5 percent and 10 percent, with TCRs of 400ppm/C at less than 20 ohms and 350ppm/C at 20 ohms and above. Operating temperature range is 55C to 275C. IRC also plans to produce devices outside these specifications to meet customer requirements.

CAW and CAF series resistors are priced at 6.5 cents each for the 5W devices and 15 cents each for the 10W devices, both in quantities of 10,000. Lead time is from stock to 8 weeks.

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