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. The normal style &
‘RSF-WV’ style of RSF series are coated with
layers of gray flame-proof lacquer, and the
miniature 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
ød
H
L
øD
RSF-25
RSF-50
RSF100
RSF200
RSF3WM
RSF300
RSF500
Note: RSF1WS (for MB Type) ød = 0.8±0.05mm
Unit: mm
DiMeNsioN
Miniature
RSF50S
RSF1WS
RSF2WS
RSF3WS
RSF5SS
RSF5WS
-
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
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
19
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 & for E24 series value
-55°C to +155°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
400V
300V
rsF1Ws
rsF2Ws
2W
350V
600V
500V
rsF3Ws
3W
350V
rsF5ss
5W
500V
800V
rsF5Ws
5W
700V
900V
1Ω - 1MΩ & for E24 series value
-55°C to +155°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.
(Not more than maximum Overload Voltage)
In V-Block for 60 sec., test voltage as above table
Between -55°C to +155°C
in V-block for 60 Sec.
245±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 (or Umax., Whichever less) for 1,000 Hr.
(1.5Hr.on, 0.5Hr. 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
No Breakdown
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: 2020
Note: Rated Continuous Working Voltage (RCWV) =
Power Rating x Resistance Value or Max. working voltage listed above, whichever less.
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