IRC offers cylindrical surge resistors that provide stability and thermal compliance

MUNICH, Germany, 16 Nov. 2006. The TT electronics IRC Wire and Film Technologies Division in Boone, N.C., is offering a family of power metal electrode face (MELF) resistors for harsh-environment applications with ratings of as much as 2 Watts. IRC introduced the devices this week at the Electronic trade show in Munich, Germany.

MUNICH, Germany, 16 Nov. 2006. The TT electronics IRC Wire and Film Technologies Division in Boone, N.C., is offering a family of power metal electrode face (MELF) resistors for harsh-environment applications with ratings of as much as 2 Watts. IRC introduced the devices this week at the Electronic trade show in Munich, Germany.

Consisting of the CHP, SMC, and HSF series resistors, the devices in the power MELF family use IRC's Metal Glaze resistive element on ceramic substrates.

"The rugged CHP and SMC series resistors are rated up to 2 Watts and provide maximum thermal compliance, while the HSF Series resistors offer as much as three times the surge rating of standard CHP resistors, which equates to up to 10 times the surge rating of similar-sized flat thick film chip resistors," says David Winkler, product manager for IRC's Wire and Film Technologies Division.

The Metal Glaze thick film element on the CHP Series devices is fired at 1000 degrees Celsius to a solid ceramic substrate. The resistors feature power ratings of 1/4 Watt, 1/2 Watt, and 1 Watt at 70 C and 2 Watts at 25 C.

The SMC Series resistors feature metal caps fitted on the terminals of the cylindrical resistor body to give the devices exceptional thermal compliance. The resistors have a maximum power rating of 1 Watts at 70 C for the 2512 package and 2 Watts at 70 C for the 3610 size.

The HSF Series resistors feature an unspiralled thick film element and are designed to fit within the footprint of a standard 2512 chip. Power rating is 1 Watt at 70 C and working voltage is 350 volts.

Maximum operating temperature for the resistors is 150 C. IRC will also produce devices outside these specifications to meet customer requirements.

For more information contact IRC online at www.irctt.com.

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