Through-hole resisTors
FEATURES
Power Rating 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
DERATING CURVE
For resistors operated in ambient temperatures above 40°C, power rating must be derated
in accordance with the curve below.
FUSING CHARACTERISTICS
R≤2.0Ω Fusing time within 60 seconds at 36 times of rated power
R>2.0Ω Fusing time within 60 seconds at 25 times of rated power
Fusing residual resistive value at least 100 times rated resistance
DIMENSIONS
Unit: mm
STYLE DIMENSION
Normal Miniature L øD H ød
- FKN50S/FKN1SS 6.3±0.5 2.5±0.3 28±2.0 0.55±0.05
FKN-50 FKN1WS/FKN2SS 9.0±0.5 3.5±0.3 26±2.0 0.55±0.05
FKN100 FKN2WS 11.5±1.0 4.6±0.5 35±2.0 0.8±0.05
FKN200 FKN3WS 15.5±1.0 5.2±0.5 33±2.0 0.8±0.05
FKN300
FKN400
FKN5WS 17.5±1.0 6.2±0.5 32±2.0 0.8±0.05
FKN500 FKN7WS 24.5±1.0 8.2±0.5 38±2.0 0.8±0.05
Note: FKN1WS ( for MB Type ) ød = 0.8±0.05 mm
INTRODUCTION
The resistor element is a resistive wire which
is wound in a single layer on a ceramic rod,
with tinned connecting wires of electrolytic
copper welded to the end-caps. The ends of
the resistive wire 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.
Fusible &
Flame-Proof Type
Normal & Miniature Style [ FKN Series ]
ød
H L øD
5th color code: white
Rated Load (%)
Ambient Temperature (°C)
30025020015010050
100
80
60
40
20
70
3W-7WS
1/2WS-3WS
155 27540 °C
Wirewound Resistors
Revision: 2020
47
Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.
ELECTRICAL CHARACTERISTICS
NORMAL STYLE
STYLE FKN-50 FKN100 FKN200 FKN300 FKN400 FKN500
Power Rating at 40°C 3W 4W 5W
Power Rating at 70°C 1/2W 1W 2W
Maximum working voltage
PxR
Voltage Proof on Insulation 300V
Resistance Range (±1%) 0.5Ω - 100Ω 0.47Ω - 150Ω 0.56Ω - 330Ω 1Ω - 620Ω
Resistance Range (±5%) 0.5Ω - 47Ω 0.5Ω - 100Ω 0.47Ω - 150Ω 0.56Ω - 330Ω 1Ω - 620Ω
Operating Temp. Range -40°C to +155°C
Temperature Coefcient ±350ppm/°C
Note: Special value is available on request
MINIATURE STYLE
STYLE FKN50S FKN1WS/FKN1SS FKN2WS/FKN2SS FKN3WS FKN5WS FKN7WS
Power Rating at 40°C 5W 7W
Power Rating at 70°C 1/2W 1W 2W 3W
Maximum working voltage
PxR
Voltage Proof on Insulation 200V 300V
Resistance Range (±1%) 0.47Ω - 100Ω 0.47Ω - 150Ω 0.47Ω - 240Ω 0.56Ω - 330Ω 1Ω - 620Ω
Resistance Range (±5%) 2.5Ω - 22Ω 0.47Ω - 100Ω 0.47Ω - 150Ω 0.47Ω - 240Ω 0.56Ω - 330Ω 1Ω - 620Ω
Operating Temp. Range -40°C to +155°C
Temperature Coefcient ±350ppm/°C
Note: Special value is available on request
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload IEC 60115-1 4.13 10 times rated power for 5 Sec. ±2.0%+0.05Ω
Voltage Proof on Insulation IEC 60115-1 4.7 In V-Block for 60 sec., test voltage as above table No Breakdown
Temperature Coefcient IEC 60115-1 4.8 Between -40°C to +155°C By type
Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >100MΩ
Solderability IEC 60115-1 4.17 245±5°C for 3±0.5 Sec. 95% Min. coverage
Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 5±0.5 Min. with ultrasonic
No deterioration of
coatings and markings
Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads ≥2.5kg (24.5N)
Damp Heat Steady State IEC 60115-1 4.24 40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV ±5.0%+0.05Ω
Endurance at 70°C IEC 60115-1 4.25 70±2°C at RCWV (or Umax., Whichever less) for 1,000 Hr. (1.5Hr.on, 0.5Hr. Off) ±5.0%+0.05Ω
Temperature Cycling IEC 60115-1 4.19 -55°C Room Temp. +155°C Room Temp. (5 cycles) ±1.0%+0.05Ω
Resistance to Soldering Heat IEC 60115-1 4.18 260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body ±1.0%+0.05Ω
Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min.
No evidence of aming
or arcing