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DATA SHEET
WIREWOUND RESISTORS
Fusible, Flameproof
FKN Series
±1%, ±5%
1/2W to 7W
RoHS compliant & Halogen Free
Product specification – August 16, 2021 V.0
Through Hole Resistors
Product Specification
2
18
Wirewound Resistors
FKN
ORDERING INFORMATION
Part number of the fusible wire wound resistor are identified by the series,
power rating, tolerance, packing, temperature coefficient, forming and
resistance value and suffix.
PART NUMBER
APPLICATIONS
Chargers & adapters
Home appliance
Lighting
Safety application
(2) POWER RATING
50S = 1/2W
-50 = 1/2W
1SS =1W
1WS = 1W
100 = 1W
(3) TOLERANCE
F = ±1%
(4) PACKAGING
R = Reel Pack
B = Bulk
T = Box Pack
J = ±5%
2SS = 2W
2WS = 2W
200 = 2W
3WS = 3W
300 = 3W
400 = 4W
5WS = 5W
500 = 5W
7WS = 7W
FKN
(1)
2WS
(2)
F
(3)
T
(4)
F
(5)
73-
(6)
10R
(7)
CL
(8)
(1) SERIES
FKN Series
FEATURES
UL1412 certified
Fusing time <60S for 25 or 36
times rated power
Fusible function
Excellent surge performance,
customized surge
requirements
Flameproof coating equivalent
to UL-94V-0
RoHS compliant &
halogen-
free
(5) TEMPERATURE COEFFICIENT OF RESISTANCE
- = Based on spec.
(6) FORMING
52- = 52.4mm
63- =63mm
73- = 73mm
91- =91mm
M = M-Type Forming
MB = M-form W/flat
F = F Type
FFK = F-form Kink
(7) RESISTANCE VALUE
E24 & E96 Series
Example; 1R = 1Ω, 10R = 10RΩ, 100R = 100Ω
(8) Suffix
Optional code. required only when resistor is with particular pulse/surge
specification.
Example : NE, CM, CN, CU, CY, FB, FC, NS, NM, CR, NL, NJ and etc.
Null = Standard Type.
FKK = FKK Type
FT = FT Type Forming
PN = PANAsert
AV = AVIsert
ZFH = Surface mount
FK = FK Type
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Aug. 16, 2021
V.0
Through Hole Resistors
Product Specification
3
18
Wirewound Resistors
FKN
DIMENSIONS
Unit: mm
Normal
-
FKN1SS
FKN1WS
FKN-50
FKN2SS
FKN100
FKN200
FKN300
FKN5WS
FKN400
FKN500
FKN7WS
24.5 ± 1.0 8.5 ± 0.5
38 ± 2.0
0.8 ± 0.05
17.5 ± 1.0 6.5 ± 0.5
32 ± 2.0
0.8 ± 0.05
FKN2WS
FKN3WS
11.5 ± 1.0 4.6 ± 0.5
15.5 ± 1.0 5.2 ± 0.5
35 ± 2.0
33 ± 2.0
9.0 ± 0.5
3.5 ± 0.3
26 ± 2.0
0.55 ± 0.05
0.8±0.05
0.8 ± 0.05
0.8 ± 0.05
Miniature
FKN50S
6.3 ± 0.5
2.5 ± 0.3
28 ± 2.0
0.55 ± 0.05
L
ψD
H
ψd
DERATING CURVE
FKN50S~3WS
100
80
60
58
40
20
70
155
275
Ambient Temperature (
°
C)
Rated Power (%)
FKN300~7WS
100
80
60
51
40
20
40
155
275
Ambient Temperature (
°
C)
Rated Power (%)
www.yageo.com
Aug. 16, 2021
V.0
Through Hole Resistors
Product Specification
4
18
Wirewound Resistors
FKN
ELECTRICAL CHARACTERISTICS
CHARACTERISTICS
Power Rating at 40°C
Power Rating at 70°C
Resistance Range (±1%)
Resistance Range (±5%)
Voltage Proof on Insulation
Maximum working voltage
Operating Temp. Range
Temperature Coefficient
0.5Ω~47Ω
300V
√(P X R)
- 40
℃
to + 155
℃
±350ppm/°C
1/2W
1W
0.5Ω~100Ω
0.5Ω~100Ω
2W
0.47Ω~150Ω
0.47Ω~150Ω
0.56Ω~330Ω
0.56Ω~330Ω
0.56Ω~330Ω 1Ω~620Ω
0.56Ω~330Ω 1Ω~620Ω
FKN-50
FKN100
FKN200
FKN300
3W
FKN400
4W
FKN500
5W
CHARACTERISTICS FKN50S
Power Rating
at 40 °C
Power Rating
at 70 °C
Resistance Range
(±1%)
Resistance Range
(±5%)
Voltage Proof on
Insulation
Maximum working
voltage
Operating Temp.
Range
Temperature
Coefficient
2.5Ω~22
Ω
200V
√(P X R)
1/2W
FKN1WS FKN1SS
FKN2WS
FKN2SS
FKN3WS
FKN5WS
5W
FKN7WS
7W
1W
0.47Ω -
100Ω
0.47Ω -
100Ω
300V
1W
0.47Ω -
100Ω
0.47Ω -
100Ω
300V
2W
0.47Ω -
150Ω
0.47Ω -
150Ω
300V
2W
0.47Ω -
150Ω
0.47Ω -
150Ω
300V
3W
0.47Ω -
240Ω
0.47Ω -
240Ω
300V
0.56Ω -
330Ω
0.56Ω -
330Ω
300V
1Ω -
620Ω
1Ω -
620Ω
300V
- 40°C to + 155°C
±350ppm/°C
Note: For resistance value out of above range is by request.
FUSING CHARACTERISTICS
R≤2.0 Ω Fusing time within 60 seconds at 36 times of rated power;
R>2.0 Ω Fusing time within 60 seconds at 25 times of rated power;
Fusing residual resistive value at least 100 times rated resistance.
Specific fusing characteristic(time VS. power) and surge withstanding capacity on request.
www.yageo.com
Aug. 16, 2021
V.0
Through Hole Resistors
Product Specification
5
18
Wirewound Resistors
FKN
TEST AND REQUIRMENTS
TEST
Short Time Overload
Voltage Proof on
Insulation
Temperature Coefficient
Insulation Resistance
Solderability
Solvent Resistance of
Marking
Robustness of
Terminations
Damp Heat Steady State
IEC 60115-1 4.24
IEC 60115-1 4.16
Direct load for 10 Sec. in the direction of
the terminal leads
40±2°C,90-95% RH for 56 days, loaded
with 0.1 times RCWV(or Umax.,
whichever less)
Endurance at 70°C
IEC 60115-1 4.25
70±2°C at RCWV(or Umax., whichever
less) for 1,000 Hr.(1.5 Hr.on,0.5 Hr. off)
Temperature Cycling
IEC 60115-1 4.19
-55°C
Room Temp.
Room Temp.(5 cycles)
Resistance to Soldering
Heat
Accidental Overload Test
IEC 60115-1 4.26
IEC 60115-1 4.18
260±3°C for 10±1 Sec., immersed to a
point 3±0.5mm from the body
4 times RCWV for 1 Min.
No evidence of
Flaming or arcing
±1.0%+0.05Ω
+155°C
±1.0%+0.05Ω
±5.0%+0.05Ω
±5.0%+0.05Ω
IEC 60115-1 4.8
IEC 60115-1 4.6
IEC 60115-1 4.17
IEC 60115-1 4.30
TEST METHOD
IEC 60115-1 4.13
IEC 60115-1 4.7
PROCEDURE
10 times rated power for 5 sec.
In V-Block for 60 sec. test voltage as
above table
Between -40°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
By Type
>100MΩ
95% Min. coverage
No deterioration of
coatings and markings
≥2.5Kg(24.5N)
APPRAISE
±2.0%+0.05Ω
No Breakdown
Note:.
RCWV (Rated Continuous Working Voltage ):
The DC or AC (rms) continuous working voltage corresponding to the rated power is determined by the following
formula:
V=√(P X R)
or max. working voltage whichever is less
Where
V=Continuous rated DC or
AC (rms) working voltage (V)
P=Rated power (W)
R=Resistance value (Ω)
www.yageo.com
Aug. 16, 2021
V.0