leaded resIsTOrs
Metal Oxide Film Resistors
Flame-Proof Type
Normal & Miniature Style [ RSF Series ]
FeaTUres
Power Rating
Resistance Tolerance
T.C.R.
Flameproof Multi-layer Coating Meets
Flameproof Feature Meets Overload Test
1/4W, 1/2W, 1W, 2W, 3W, 5W
±2%, ±5%
±300ppm/ºC
UL-94V-0
UL-1412
INTrOdUCTION
The RSF Series Metal Oxide Film Flame Proof
Resistors offer excellent performance in applica-
tions 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 ap-
plications, 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.
deraTING CUrVe
For resistors operated in ambient temperatures above 70ºC, power rating must be derated in
accordance with the curve below.
Rated Load (%)
100
80
60
40
20
0
100
10
200
20
70ºC
Ambient Temperature (°C)
dIMeNsIONs
sTYle
Normal
RSF-25
RSF-50
ød
H
L
øD
RSF100
RSF200
RSF3WM
RSF300
RSF500
Miniature
RSF50S
RSF1WS
RSF2WS
RSF3WS
RSF5SS
RSF5WS
-
dIMeNsION
l
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
17.5±1.0
24.5±1.0
24.5±1.0
ød
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
6.5±1.0
8.5±1.0
8.5±1.0
H
28±2.0
26±2.0
35±2.0
33±2.0
32±2.0
38±2.0
38±2.0
ød
Unit : mm
0.55±0.05
0.55±0.05
0.8±0.05
0.8±0.05
0.8±0.05
0.8±0.05
0.8±0.05
* RSFIWS (for MB Type) ød=0.8±0.05mm
17
eleCTrICal CHaraCTerIsTICs
NOrMal sTYle
sTYle
rsF-25
rsF-50
rsF100
rsF200
rsF3WM
rsF300
rsF500
Power Rating at 70 ºC
Maximum Working Voltage
Maximum Overload Voltage
Dielectric Withstanding Voltage
Resistance Range
Operating Temp. Range
Temperature Coefficient
MINIaTUre sTYle
sTYle
1/4W
200V
300V
250V
1/2W
250V
400V
350V
1W
350V
600V
500V
2W
3W
450V
700V
600V
500V
800V
700V
5W
750V
1000V
750V
1Ω ~ 1MΩ & 0Ω for E24 series value
- 55ºC to + 155ºC
±300ppm/ºC
rsF50s
rsF1Ws
rsF2Ws
rsF3Ws
rsF5ss
rsF5Ws
Power Rating at 70 ºC
Maximum Working Voltage
Maximum Overload Voltage
Dielectric Withstanding Voltage
Resistance Range
Operating Temp. Range
Temperature Coefficient
1/2W
250V
400V
350V
1W
300V
500V
400V
2W
350V
600V
500V
3W
5W
500V
800V
700V
750V
1000V
750V
1Ω ~ 1MΩ & 0Ω for E24 series value
- 55ºC to + 155ºC
±300ppm/ºC
* Below or over this resistance range on request.
eNVIrONMeNTal CHaraCTerIsTICs
PerFOrMaNCe TesT
Short Time Overload
Dielectric Withstanding Voltage
Temperature Coefficient
Insulation Resistance
Solderability
Resistance to Solvent
TesT MeTHOd
JIS-C-5202 5.5
JIS-C-5202 5.7
JIS-C-5202 5.2
JIS-C-5202 5.6
JIS-C-5202 6.5
JIS-C-5202 6.9
2.5 Times RCWV for 5 Seconds
in V-Block for 60 Seconds
-55ºC to +155ºC
in V-Block
260ºC ±5ºC for 5 ±0.5 Seconds
IPA for 1 Min. with Ultrasonic
aPPraIse
±(1.0%+0.05Ω) for normal style
±(2.0%+0.05Ω) for miniature style
by Type
by Type
>1,000MΩ
95% Min. Coverage
No deterioration of
Coatings and Markings
Terminal Strength
Pulse Overload
Load Life in Humidity
Load Life
Temperature Cycling
Resistance to Soldering Heat
Overload Flame Retardant
JIS-C-5202 6.1
JIS-C-5202 5.8
JIS-C-5202 7.9
JIS-C-5202 7.10
JIS-C-5202 7.4
JIS-C-5202 6.4
JIS-C-5202 7.12
Direct load for 10 Sec. In the Direction of the Terminal Leads
4 Times RCWV 10000 Cycles (1 Sec. On, 25 Sec. off)
40±2ºC , 90~95% RH at RCWV for 1,000 Hrs. (1.5 Hrs. on , 0.5 Hrs. off)
70ºC at RCWV for 1,0000 Hrs. (1.5 Hrs. on 0.5 Hrs. off)
-55ºCgRoom Temp.g+155ºCgRoom Temp. for 5 Cycles
350ºC ±10ºC for 3±0.5 Seconds
4 Times RCWV for 1 Minute
≧2.5kg
(24.5N)
±2.0%+0.05Ω
±5%+0.05Ω
±5%+0.05Ω
±1%+0.05Ω
±1%+0.05Ω
No evidence of
flaming or arcing
* Rated Continuous Working Voltage (RCW V)=
Power Rating x Resistance Value
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