Reference Standards
JIS C 5201-1
FKN series
FUSIBLE WIRE WOUND RESISTORS, FLAMEPROOF
ELECTRICAL AND MECHANICAL PERFORMANCE
ENVIRONMENTAL CHARACTERISTICS
1. It is suitable for protecting circuit boards.
2. Noncombustible insulating coating; Solvent proof
and resistant to high temperature.
3. Low temperature coefficient.
4. Uniform in fusing time.
Features
1.
2.
3. ( 300ppm/ )
4.
Characteristics
Characteristics
Resistance Tolerance
Resistance Temp. Coeff.
Power Rating Load
Short Time Overload
Dielectric Withstanding Voltage
Insulation Resistance
Temp. Cycle
Load Life
Moisture-proof Load Life
Standards
Standards
5% ( J ) or 2% ( G )
R/R 1%
300 ppm /
R/R 5%
R/R 5%
2%
No evidence of mechanical damage
or insulation breakdown.
Applying suitable voltage listed on
Dimensions for one minute.
2.5 times of rated voltage
for 5 seconds.
Test Methods
Test Methods
-
-55 ( 30 min.) Room Temp.( 3 min.)
+200 ( 30 min.)
Room Temp.( 3 min.) / ( 5 cycles)
-55 ~ 200
Rated power load 90 minutes ON
30 minutes OFF
70 1000 hours
Rated power load 90 minutes ON
30 minutes OFF
40 95% RH 1000 hours
16 times of rated wattage for 5 min.
1
2.5 / 5
1,000MÙ
Surface temp. 275 Max.
275 , R/R 3%
Rated voltage for 30 minutes
/ 30
Nonflammability
not flamed
Solder-ability
Resistance to Soldering Heat
Minimum 95% coverage
95%
No evidence of mechanical damage.
, R/R 1%
235 5 for 2 seconds
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
Fusing Characteristics
Fusing time is within 60 seconds.
< 60 .
5.
UL1412 approval：FKN 1W ~ 3W Series.
5.
UL1412認証：FKN 1W ~ 3W Series。
DC100V or 500V megger
25 times of rated wattage
FKN series
-55
70
0 50
20 40 60 80 100
1W
2W
3W
5W
100 150 200 250 275
0
0
20
0
40
60
100
80
100
200
300
H DL H
Derating Curve
How to order
For resistors operated in ambient temperatures above 70 ,
power rating must be derated in accordance with the curve
below.
a. b. c. d. e.
Unit mm
1W
2W
3W
5W
4.0
5.0
5.5
6.5
9
11
13
19
28
28
38
38
0.65
0.8
0.8
0.8
0.1~500
0.1~800
0.1~800
0.1~800
350V
500V
500V
500V
D1
L1 H3
d0.1
Resistance
Range(Ù)
Dielectric
Withstanding
Voltage
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance and Package. e.g.
a. Type( ): Fusible Wire Wound Resistors, Flameproof are called "FKN".
b. Rated Wattage(
) : Shown by "W", such as 1W, 2W, 3W, 5W.
c. Nominal Resistance( ) : 10Ù.
d. Tolerance( ): G 2% , J 5% .
e. Package( ) :
T/R tape & reel ( ); T/B tape in box( ); Nil Bulk( ).
d
Dimensions
Ambient Temp.
O
(C)
Rated Load
(%)
Rated Load
(%)
Surface Temperature Rise
O
(C)
Surface Temperature Rise
Rated
Wattage
1. Fusing time can also be consulted between buyers and the
manufacturer before producing.
2. The resistance value will be as high as 100 times the original value
after fusing.
Note:
-50
FKN
1W
10R
J
T/B