PRM SERIES
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PULSE RESISTORS, SURFACE MOUNT □ High voltage/ high surge capability □ Cost effective surface mount package □ Available on RCD’s exclusive SWIFT TM OPTIONS □ Option ER: Group A Screening per MIL-R-39008 RCR □ Option B: Increased power □ Option X: Non-inductive Pulse tolerant surface mount resistors! Series PRM withstand high energy pulses, and are superior to conventional film & wirewound types. The heavy duty construction features a ceramic core, enabling improved thermal transfer and long term stability. Elements are protected by flame-retardant molding for excellent environmental performance. Alpha-numeric marking is standard. PRM resistors are cost effective in a wide variety of pulse applications including telecom line feed resistors, snubber circuits, inrush currents, capacitor charge/discharge circuits, lightning surges, etc. 1 Rated continuous voltage = V(PxR), nte value listed. 2Pulse voltage capability is dependent on res.value, waveform, & repetition rate. 3 Expanded range available 4Miltiply by 0.7 on Opt.X parts SURGE CAPABILITY TYPICAL PERFORMANCE CHARACTERISTICS Wattage Derating Options: X, ER, B (leave blank if std) Packaging: B = bulk, T = Tape & Reel * specify Opt.75 for induc levels 50% that of Opt.X, or Opt.76 for 33% that of Opt.X APPLICATION NOTE Use chart above to select model to meet desired surge level. Pulse not to exceed peak V & j ratings (derate 30% for Opt.X), and average power during repetitive pulses nte rated W. 30% safety factor is recommended for infrequent pulses, 50% typ. for repetitive pulses (request Note R42 for derating factors attributable to pulse width, rep. rate, temp., altitude, humidity). Verify by evaluating under worst-case conditions. Depending on specifics, PR series can often satisfy the surge requirements of UL-217, -268, -294, -497, -508, -913, -943, -991, -1459, -1971, ANSI/IEEE C62.41, CCITT (Rec. K17), Bellcore TR-NWT-001089 & TR-TSY-000057, CSA C22.2-225, IEC 664, IEC 801.5, IEEE587, Can.Doc. CS-03, FCC Part 68., etc. Consult factory for assistance. Optional TC: 20 =20ppm, 50= 50ppm (leave blank if standard) Termination: W= Lead-free, Q= Tin/Lead (leave blank if either is acceptable, in which case RCD will select based on lowest price and quickest delivery) RCD Components Inc, 520 E. Industrial Park Dr, Manchester, NH, USA 03109 rcdcomponents.com Tel: 603-669-0054 Fax: 603-669-5455 Email:sales@rcdcomponents.com FA005E Sale of this product is in accordance with GF-061. Specifications subject to change without