Through-hole resisT ors
Flame-Proof Type
Metal Oxide Film Resistors
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
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. They provide lower
in accordance with the curve below.
cost alternatives to Carbon Composition
Resistors and General Purpose Metal Films. 70 155 235C
Rated Load (%)
100
Metal Oxides also can replace many low power
80
General Purpose wirewound applications, saving
60
both money and time, with shorter delivery
40
cycles. The normal style & RSF-WV style of
RSF series are coated with layers of gray flame- 20
proof lacquer, and the miniature style except
Ambient Temperature (C)
50 100 150 200 250
RSF-WV style are coated with layers of pink
colors flame-proof lacquer.
DiMeNsioNs Unit: mm
s TYle DiMeNsio N
Normal Miniature l D h d
RSF-25 RSF50S / RSF1WV 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 / RSF2WV 11.51.0 4.50.5 352.0 0.80.05
d
RSF200 RSF3WS 15.51.0 5.00.5 332.0 0.80.05
H L D
- RSF3WV 16.5+0/-1.5 6.0+0/-0.5 332.0 0.80.05
RSF3WM RSF5SS 17.51.0 6.51.0 322.0 0.80.05
- RSF4WV 20+0/-1 9.0+0/-0.5 312.0 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
RSF3WV, RSF4WV: Marking Printed21
eleCTriCAl ChArACTerisTiCs
Nor MAl s TYle
s TYle 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 & 0 for E24 series value
Operating Temp. Range -55C to +235C
Temperature Coefficient 300ppm/C
MiNi ATure s TYle
s TYle rs F50s rs F1WV rs F1Ws rs F2Ws rs F2WV rs F3Ws rs F3WV rs F5ss rs F4WV rs F5Ws
Power Rating at 70C 1/2W 1W 2W 3W 5W 4W 5W
Maximum Working Voltage 250V 500V 300V 350V 500V 350V 750V 500V 750V 700V
Maximum Overload Voltage 400V 500V 600V 750V 800V 900V
Voltage Proof on Insulation 350V 500V 400V 500V
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
Per For MANCe Tes T Tes T MeTho D APPr Aise
1.0%+0.05 for normal style
Shor t Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec.
2.0%+0.05 for miniature style
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
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
No deterioration of coatings and
Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic
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) 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
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
Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 201304