Through-hole resisT ors Flame-Proof Type Metal o xide Film r esistors Normal & Miniature style rs F series FeATures Power Rating 1/4W, 1/2W, 1W, 2W, 3W, 5W Resistance Tolerance 2%, 5% T.C.R. 300ppm/C Flameproof Multi-layer Coating Meets UL-94V-0 Flameproof Feature Meets Overload Test UL-1412 iNTroDuCTioN The RSF Series Metal Oxide Film Flame-Proof Resistors offer excellent performance in DerATiNg Cur Ve applications where stability and uniformity of For resistors operated in ambient temperatures above 70C, power rating must be derated characteristics are desired. The normal style & in accordance with the curve below. RSF-WV style of RSF series are coated with layers of gray flame-proof lacquer, and the 70 155 235C Rated Load (%) 100 miniature style are coated with layers of pink 80 colors flame-proof lacquer. 60 40 20 Ambient Temperature (C) 50 100 150 200 250 DiMeNsioNs Unit: mm sTYle DiMeNsioN Normal Miniature l D h d RSF-25 RSF50S 6.30.5 2.40.2 282.0 0.550.05 d RSF-50 RSF1WS 9.00.5 3.30.3 262.0 0.550.05 H L D RSF100 RSF2WS 11.51.0 4.50.5 352.0 0.80.05 RSF200 RSF3WS 15.51.0 5.00.5 332.0 0.80.05 RSF3WM RSF5SS 17.51.0 6.51.0 322.0 0.80.05 RSF300 RSF5WS 24.51.0 8.51.0 382.0 0.80.05 RSF500 - 24.51.0 8.51.0 382.0 0.80.05 Note: RSF1WS (for MB Type) d = 0.80.05mm 19 eleCTriCAl ChArACTerisTiCs Nor MAl s TYle sTYle rs F-25 rs F-50 rs F100 rs F200 rs F3WM rs F300 rs F500 Power Rating at 70C 1/4W 1/2W 1W 2W 3W 5W Maximum Working Voltage 200V 250V 350V 450V 500V 750V Maximum Overload Voltage 300V 400V 600V 700V 800V 1,000V Voltage Proof on Insulation 250V 350V 500V Resistance Range 1 - 1M & for E24 series value Operating Temp. Range -55C to +155C Temperature Coefficient 300ppm/C MiNiATure sTYle sTYle rs F50s rs F1Ws rs F2Ws rs F3Ws rs F5ss rs F5Ws Power Rating at 70C 1/2W 2W 3W 5W 5W Maximum Working Voltage 250V 300V 350V 350V 500V 700V Maximum Overload Voltage 400V 600V 800V 900V Voltage Proof on Insulation 350V 400V 500V Resistance Range 1 - 1M & for E24 series value Operating Temp. Range -55C to +155C Temperature Coefficient 300ppm/C Note: Special value is available on request eNViroNMeNTAl ChArACTerisTiCs Per For MANCe TesT TesT MeTho D APPr Aise 2.5 times RCWV for 5 sec. 1.0%+0.05 for normal style Shor t Time Overload IEC 60115-1 4.13 (Not more than maximum Overload Voltage) 2.0%+0.05 for miniature style Voltage Proof on Insulation IEC 60115-1 4.7 In V-Block for 60 sec., test voltage as above table No Breakdown Temperature Coefficient IEC 60115-1 4.8 Between -55C to +155C By type Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >1,000M Solderability IEC 60115-1 4.17 2455C for 30.5 Sec. 95% Min. coverage No deterioration of coatings and Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic markings Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads 2.5kg (24.5N) Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) 2.0%+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 702C at RCWV (or Umax., Whichever less) for 1,000 Hr. Endurance at 70C IEC 60115-1 4.25 5.0%+0.05 (1.5Hr.on, 0.5Hr. Off) Temperature Cycling IEC 60115-1 4.19 -55C Room Temp. +155C Room Temp. (5 cycles) 1.0%+0.05 2603C for 101 Sec., immersed to a point 30.5mm from the Resistance to Soldering Heat IEC 60115-1 4.18 1.0%+0.05 body Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min. No evidence of flaming or arcing Revision: 2020 Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.