leaded resISTORS Metal Oxide Film Resistors Flame-Proof Type Normal & Miniature Style [ RSF 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 DERATING CURVE The RSF Series Metal Oxide Film Flame-Proof Resistors offer excellent performance in applications where stability and uniformity of characteristics are desired. They provide lower cost alternatives to Carbon Composition Resistors and General Purpose Metal Films. Metal Oxides also can replace many low power General Purpose wirewound applications, saving both money and time, with shorter delivery cycles. The normal style & the miniature style of RSF series are coated with layers of gray and pink colors flame-proof lacquer respectively. For resistors operated in ambient temperatures above 70C, power rating must be derated in accordance with the curve below. 70 Rated Load (%) 155 235C 100 80 60 40 20 50 Ambient Temperature (C) 100 150 200 250 DIMENSIONS Unit: mm STYLE od H L oD Note: RSF1WS (for MB Type) od = 0.80.05mm DIMENSION Normal Miniature L oD H od RSF-25 RSF50S 6.30.5 2.40.2 282.0 0.550.05 RSF-50 RSF1WS 9.00.5 3.30.3 262.0 0.550.05 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 23 ELECTRICAL CHARACTERISTICS Normal STYLE STYLE RSF-25 RSF-50 RSF100 RSF200 RSF3WM RSF300 RSF500 Power Rating at 70C 1/4W 1/2W 1W 2W 3W Maximum Working Voltage 200V 250V 350V 450V 500V 750V Maximum Overload Voltage 300V 400V 600V 700V 800V 1,000V Voltage Proof 250V 350V 500V 600V 700V 750V Resistance Range 1 - 1M & 0 for E24 series value Operating Temp. Range -55C to +235C Temperature Coefficient 300ppm/C 5W MINIATURE STYLE STYLE RSF50S RSF1WS RSF2WS RSF3WS RSF5SS RSF5WS Power Rating at 70C 1/2W 1W 2W 3W 5W Maximum Working Voltage 250V 300V 350V 500V 700V Maximum Overload Voltage 400V 500V 600V 800V 900V Voltage Proof 350V 400V 500V 700V 700V Resistance Range 1 - 1M & 0 for E24 series value Operating Temp. Range -55C to +235C Temperature Coefficient 300ppm/C Note: Special value is available on request ENVIRONMENTAL CHARACTERISTICS PERFORMANCE TEST TEST METHOD Short Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec. 1.0%+0.05 for normal style 2.0%+0.05 for miniature style Voltage Proof 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 Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >1,000M Solderability IEC 60115-1 4.17 2355C for 30.5 Sec. 95% Min. coverage Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic No deterioration of coatings and 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 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) 1.0%+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 Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min. No evidence of flaming or arcing Note: Rated Continuous Working Voltage (RCWV) = APPRAISE Power Rating x Resistance Value