The PR Series was developed to offer overload capabilities approaching or exceeding those of carbon composition resistors, particularly in values below 1000 Ohms. If your application does not involve a sizable surge, then please consult with our engineering group since it is likely that a lower cost film or wirewound resistor will suffice. The pulse withstand performance of RCD's PR Series is value dependent.
Low values offer increased overload capabilities due to the increased mass of resistance material.
Consult the Multiple Surge Capability Charts to determine if the PR series is appropriate for your application. 1 Second 50X rated power 5 Seconds 5X rated power 10 Seconds 2X rated power 30 Seconds 1.5X rated power 60 seconds 1X rated power RCD's PR series are rated the same for single or multi surges as long as average power level doesn t exceed the resistor power rating. Carbon comp resistors are generally capable of much higher single pulse levels than indicated on the multiple surge capability chart so this must be considered when replacing CC resistors. 50ohm when measured at 500KHz. Ohms is capable of 21 joules.