YAGEO FKN-25 Flame-proof type normal & miniature style [ fkn series ] Datasheet

leaded resISTORS
Flame-Proof Type
Fusible Wirewound
Resistors
Normal & Miniature Style [ FKN Series ]
FEATURES
Power Rating
1/4W, 1/2W, 1W, 2W, 3W, 4W, 5W, 7W
Resistance Tolerance
±1%, ±5%
T.C.R.
±350ppm/°C
Flameproof Multi-layer Coating Meets
UL-94V-0
Flameproof Feature Meets Overload Test
UL-1412
INTRODUCTION
DERATING CURVE
The resistor element is a resistive wire which
is wound in a single layer on a ceramic rod,
tinned connecting wires of electrolytic copper
are welded to the end-caps. The ends of the
resistance wire and the leads are connected to
the caps by welding. The resistors are coated
with layers of green color flame proof lacquer.
Overload protection without risk of fire. Wide
range of overload currents.
For resistors operated in ambient temperatures above 40°C, power rating must be derated
in accordance with the curve below.
Rated Load (%)
40 70
155
275 °C
100
3W-7W
1/4W-3WS
80
60
40
20
50
100 150 200 250 300
Ambient Temperature (°C)
DIMENSIONS
Unit: mm
ød
H
L
øD
5th color code: white
STYLE
DIMENSION
Normal
Miniature
L
øD
H
ød
FKN-25
FKN50S
6.3±0.5
2.4±0.2
28±2.0
0.55±0.05
FKN-50
FKN1WS
9.0±0.5
3.3±0.3
26±2.0
0.55±0.05
FKN100
FKN2WS
11.5±1.0
4.5±0.5
35±2.0
0.8±0.05
FKN200
FKN3WS
15.5±1.0
5.0±0.5
33±2.0
0.8±0.05
FKN5WS
17.5±1.0
6.5±0.5
32±2.0
0.8±0.05
FKN7WS
24.5±1.0
8.0±0.5
38±2.0
0.8±0.05
FKN300
FKN400
FKN500
Note: FKN1WS ( for MB Type ) ød = 0.8±0.05 mm
53
ELECTRICAL CHARACTERISTICS
NORMAL STYLE
STYLE
FKN-25
FKN-50
FKN100
FKN200
FKN300
FKN400
FKN500
Power Rating at 70°C
1/4W
1/2W
1W
2W
3W
4W
5W
Dielectric Withstanding Voltage
200V
300V
Resistance Range
2.5 Ω - 22 Ω
0.8 Ω - 47 Ω
0.5 Ω - 100 Ω
0.1 Ω-150 Ω
0.1 Ω - 330 Ω
Operating Temp. Range
-40°C to +155°C
Temperature Coefficient
±350ppm/°C
0.1 Ω - 390 Ω
MINIATURE STYLE
STYLE
FKN50S
FKN1WS
FKN2WS
FKN3WS
FKN5WS
FKN7WS
Power Rating at 70°C
1/2W
1W
2W
3W
5W
7W
Dielectric Withstanding Voltage
200V
300V
Resistance Range
2.5 Ω - 22 Ω
0.8 Ω - 47 Ω
0.5 Ω - 100 Ω
0.1 Ω - 150 Ω
0.1 Ω - 330 Ω
0.1 Ω - 390 Ω
Operating Temp. Range
-40°C to +155°C
Temperature Coefficient
±350ppm/°C
Note: Special value is available on request
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST
TEST METHOD
Short Time Overload
JIS-C-5202 5.5
2.5 times RCWV for 5 Sec.
±2.0%+0.05 Ω
Dielectric Withstanding Voltage
JIS-C-5202 5.7
in V-Block for 60 Sec.
By type
Temperature Coefficient
JIS-C-5202 5.2
-40°C to +155°C
By type
Insulation Resistance
JIS-C-5202 5.6
in V-Block
>100M Ω
Solderability
JIS-C-5202 6.5
260±5°C for 5±0.5 Sec.
95% Min. coverage
Resistance to Solvent
JIS-C-5202 6.9
IPA for 1 Min. with ultrasonic
No deterioration of
coatings and markings
Terminal Strength
JIS-C-5202 6.1
Direct load for 10 Sec. In the direction of the terminal leads
≥2.5kg (24.5N)
Load Life in Humidity
JIS-C-5202 7.9
40±2°C, 90 - 95% RH at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
±5.0%+0.05 Ω
Load Life
JIS-C-5202 7.10
70°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
±5.0%+0.05 Ω
Temperature Cycling
JIS-C-5202 7.4
-55°C  Room Temp.  +155°C  Room Temp. (5 cycles)
±1.0%+0.05 Ω
Resistance to Soldering Heat
JIS-C-5202 6.4
350±10°C for 3±0.5 Sec.
±1.0%+0.05 Ω
Overload Flame Retardant
JIS-C-5202 7.12
4 times RCWV for 1 Min.
No evidence of flaming
or arcing
Note: Rated Continuous Working Voltage (RCWV) =
APPRAISE
Power Rating x Resistance Value
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