Boone, N.C. Capable of withstanding repetitive high energy pulses make TT electronics IRC Wirewound and Film Technologies Division's new non-inductive power resistors an excellent fit for high energy circuits in defibrillators and other medical electronics applications. Depending on the application, the NT series wirewound resistors are used to divide the voltage or limit the amount of energy delivered to the patient, said the company.
The NT series resistors are available in power ratings up to 10 watts, with resistance values from 0.1 to 125 Kohms. They also offer tolerances down to ±0.1% and standard temperature coefficient of resistance (TCRs) down to ±20ppm/°C. The operating temperature range is -55°C to 275°C. For surge ratings at specific resistance values and sizes, please contact an IRC applications engineer. Custom devices are available.
Designed for surge applications, these resistors use a heavy-gauge resistance wire that is wound in two layers. The second layer is wound in the opposite direction from the first, reducing the inductance. The additional wire mass keeps the resistance wire peak temperature lower during the surge, giving the resistor increased surge capabilities, said the company.
The company says a ground ceramic core provides excellent thermal conductivity for even distribution of heat within the part. In addition, all resistance wire connections to the stainless steel end caps and the axial leads are welded for reliability and stability. The resistor body features a high temperature silicone coating for protection.
Typical pricing for the NT series resistors starts at $1.95 each. Pricing depends on size and specifications. Delivery is approximately 12 to 14 weeks.
Call (828) 264-8861