Through-hole resisT ors Fusible & Flame-Proof Type Metal Film Resistors Normal & Miniature Style FRM Series FeATures Power Rating 1/4W, 1/2W, 1W, 2W, 3W Resistance Tolerance 2%, 5% T.C.R. 200ppm/C Flameproof Multi-layer Coating Meets UL-94V-0 Flameproof Feature Meets Overload Test UL-1412 DerATiNg Cur Ve iNTroDuCTioN For resistors operated in ambient temperatures above 70C, power rating must be derated The FRM Series Metal Film Fusible & in accordance with the curve below. Flame-Proof Resistors are manufactured using 70 155 C Rated Load (%) a vacuum sputtering system to deposit multiple 100 layers of mixed metal alloys and passivative 80 materials onto a carefully treated high grade 60 ceramic substrate. After a helical groove has 40 been cut in the resistive layer, tinned connecting 20 leads of electrolytic copper are welded to the end-caps. The resistors are coated with layers Ambient Temperature (C) 20 40 60 80 100 120 140 160 of gray color lacquer for normal size & pink color lacquer for miniature size. Overload protection without risk of fire. Wide range of overload currents. FusiNg ChArACTerisTiCs 0.1R1 Fusing time within 30 seconds at 36 times of rated power 1<R2.0 Fusing time within 30 seconds at 25 times of rated power R2.2 Fusing time within 30 seconds at 16 times of rated power Fusing residual resistive value at least 100 times rated resistance DiMeNsioNs Unit: mm s TYle DiMeNsio N Normal Miniature l D h d d FRM-25 FRM50S 6.30.5 2.40.2 282.0 0.550.05 FRM-50 FRM1WS 9.00.5 3.30.3 262.0 0.550.05 H L D FRM100 FRM2WS 11.51.0 4.50.5 352.0 0.80.05 5th color code: white FRM200 FRM3WS 15.51.0 5.00.5 332.0 0.80.0517 Note: eleCTriCAl ChArACTerisTiCs s TYle Fr M-25 Fr M50s Fr M-50 Fr M1Ws Fr M100 Fr M2Ws Fr M200 Fr M3Ws Power Rating at 70C 1/4W 1/2W 1W 2W 3W Maximum Working Voltage PxR Voltage Proof on Insulation 250V 350V Resistance Range 1 - 560 (2%) for E24 series value & 0.1 - 560 (5%) for E24 series value Operating Temp. Range -55C to +155C Temperature Coefficient 200ppm/C Note: Special value is available on request eNViroNMeNTAl ChArACTerisTiCs Per For MANCe Tes T Tes T MeTho D APPr Aise Shor t Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec. 2.0%+0.05 Voltage Proof on Insulation IEC 60115-1 4.7 in V-block for 60 Sec., test voltage by type By type Temperature Coefficient IEC 60115-1 4.8 -55C to +155C By type >100M Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. Solderability IEC 60115-1 4.17 2355C for 30.5 Sec. 95% Min. coverage No deterioration of Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic coatings and markings 2.5kg (24.5N) Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) 1.0%+0.05 Damp Heat Steady State IEC 60115-1 4.24 402C, 90-95% RH for 56 days, loaded with 0.1 times RCWV 5.0%+0.05 Endurance at 70C IEC 60115-1 4.25 702C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) 5.0%+0.05 Temperature Cycling IEC 60115-1 4.19 -55C Room Temp. +155C Room Temp. (5 cycles) 2.0%+0.05 Resistance to Soldering Heat IEC 60115-1 4.18 2603C for 101 Sec., immersed to a point 30.5mm from the body 1.0%+0.05 No evidence of flaming Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min. or arcing Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 201304