Through-hole 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/°C
UL-94V-0
UL-1412
iNTroDuCTioN
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 & ‘RSF-WV’ style of
RSF series are coated with layers of gray flame-
proof lacquer, and the miniature style except
‘RSF-WV’ style are coated with layers of pink
colors flame-proof lacquer.
DerATiNg CurVe
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
Rated Load (%)
70
100
80
60
40
20
50
100 150 200 250
155
235°C
Ambient Temperature (°C)
DiMeNsioNs
sTYle
Normal
RSF-25
RSF-50
ød
H
L
øD
RSF100
RSF200
-
RSF3WM
-
RSF300
RSF500
Note: RSF1WS (for MB Type) ød = 0.8±0.05mm
RSF3WV, RSF4WV: Marking Printed
Unit: mm
DiMeNsioN
Miniature
RSF50S / RSF1WV
RSF1WS
l
6.3±0.5
9.0±0.5
øD
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
6.0+0/-0.5
6.5±1.0
9.0+0/-0.5
8.5±1.0
8.5±1.0
h
28±2.0
26±2.0
35±2.0
33±2.0
33±2.0
32±2.0
31±2.0
38±2.0
38±2.0
ød
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
0.8±0.05
0.8±0.05
RSF2WS / RSF2WV 11.5±1.0
RSF3WS
RSF3WV
RSF5SS
RSF4WV
RSF5WS
-
15.5±1.0
16.5+0/-1.5
17.5±1.0
20+0/-1
24.5±1.0
24.5±1.0
21
eleCTriCAl ChArACTerisTiCs
NorMAl sTYle
sTYle
Power Rating at 70°C
Maximum Working Voltage
Maximum Overload Voltage
Voltage Proof on Insulation
Resistance Range
Operating Temp. Range
Temperature Coefficient
rsF-25
1/4W
200V
300V
250V
rsF-50
1/2W
250V
400V
350V
rsF100
1W
350V
600V
500V
rsF200
2W
rsF3WM
3W
450V
700V
500V
800V
rsF300
rsF500
5W
750V
1,000V
1Ω - 1MΩ & 0Ω for E24 series value
-55°C to +235°C
±300ppm/°C
MiNiATure sTYle
sTYle
Power Rating at 70°C
Maximum Working Voltage
Maximum Overload Voltage
Voltage Proof on Insulation
Resistance Range
Operating Temp. Range
Temperature Coefficient
rsF50s
1/2W
250V
400V
350V
rsF1WV rsF1Ws rsF2Ws rsF2WV rsF3Ws rsF3WV rsF5ss
1W
500V
500V
500V
400V
300V
2W
350V
600V
500V
500V
3W
350V
750V
750V
5W
500V
800V
rsF4WV rsF5Ws
4W
750V
5W
700V
900V
1Ω - 1MΩ & 0Ω for E24 series value
-55°C to +235°C
±300ppm/°C
Note: Special value is available on request
eNViroNMeNTAl ChArACTerisTiCs
PerForMANCe TesT
Short Time Overload
Voltage Proof on Insulation
Temperature Coefficient
Insulation Resistance
Solderability
Solvent Resistance of Marking
Robustness of Terminations
Periodic-pulse Overload
Damp Heat Steady State
Endurance at 70°C
Temperature Cycling
Resistance to Soldering Heat
Accidental Overload Test
TesT MeThoD
IEC 60115-1 4.13
IEC 60115-1 4.7
IEC 60115-1 4.8
IEC 60115-1 4.6
IEC 60115-1 4.17
IEC 60115-1 4.30
IEC 60115-1 4.16
IEC 60115-1 4.39
IEC 60115-1 4.24
IEC 60115-1 4.25
IEC 60115-1 4.19
IEC 60115-1 4.18
IEC 60115-1 4.26
2.5 times RCWV for 5 Sec.
in V-block for 60 Sec., test voltage by type
-55°C to +155°C
in V-block for 60 Sec.
235±5°C for 3±0.5 Sec.
IPA for 5±0.5 Min. with ultrasonic
Direct load for 10 Sec. in the direction of the terminal leads
4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)
40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV
70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
-55°C
Room Temp.
+155°C
Room Temp. (5 cycles)
260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the
body
4 times RCWV for 1 Min.
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
≥2.5kg
(24.5N)
±2.0%+0.05Ω
±5.0%+0.05Ω
±5.0%+0.05Ω
±1.0%+0.05Ω
±1.0%+0.05Ω
No evidence of flaming or arcing
Revision: 201304
Note: Rated Continuous Working Voltage (RCWV) =
Power Rating x Resistance Value or Max. working voltage listed above, whichever less.
88
exPlANATioNs oF orDeriNg CoDe
MFr
Code 1 - 3
series Name
See Index
-12
Code 4 - 6
Power rating
-05 = ød0.5mm
-06 = ød0.6mm
-07 = ød0.7mm
-08 = ød0.8mm
-10 = ød1.0mm
-14 = ød1.4mm
-12 = 1/6W
-25 = 1/4W
25S = 1/4WS
-50 = 1/2W
50S = 1/2WS
100 = 1W
1WS = 1WS
200 = 2W
2WS = 2WS
204 = 0.4W
207 = 0.6W
300 = 3W
3WS = 3WS
3WM = 3WM
400 = 4W
500 = 5W
5WS = 5WS
5SS = 5WSS
700 = 7W
7WS = 7WS
10A = 10W
20A = 20W
30A = 30W
40A = 40W
50A = 50W
10S = 10WS
15A = 15W
25A = 25W
10B = 100W
25B = 250W
F
Code 7
Tolerance
P = ±0.02 %
A = ±0.05 %
B = ±0.1 %
C = ±0.25%
D = ±0.5 %
F = ±1 %
G = ±2 %
J = ±5 %
K = ±10 %
- = Base on Spec.
T
Code 8
Packing style
T = Tape/Box
R = Tape/Reel
B = Bulk
F
Code 9
Temperature Coef-
ficient of Resistance
- = Base on Spec.
A = ±5 ppm/°C
B = ±10 ppm/°C
C = ±15 ppm/°C
S = ± 20ppm/°C
D = ±25 ppm/°C
E = ±50 ppm/°C
F = ±100 ppm/°C
G = ±200 ppm/°C
H = ±250 ppm/°C
I = ±300 ppm/°C
J = ±350 ppm/°C
52-
Code 10 - 12
Forming Type
26- = 26mm
52- = 52.4mm
73- = 73mm
81- = 81mm
91- = 91mm
F = F Type
FK = FK Type
FKK = FKK Type
FFK = F-form Kink
M = M-Type Forming
MB = M-form W/flat
MT = MT Type Forming
MR = MR Type
AV = AVIsert
PN = PANAsert
100r
Code 13 - 17
resistance Value
0R1 = 0.1
100R = 100
10K = 10,000
10M = 10,000,000
exCePTioN:
• Cement series:
• JPW series:
<Code 8>: Special packing style code
B: Bulk with wirewound or metal oxide sub-assembly for resistance value
W: Bulk with ceramic based wirewound sub-assembly for resistance value
M: Bulk with metal oxide sub-assembly for resistance value
F: Bulk with Fiberglass based wirewound sub-assembly for resistance value
<Code 10-12>: Without forming code
Example:
<Code 13-17>: without resistance value code
Example:
JPW-06-T-52-
SQP500JB-10R
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