LEADED RESISTORS
DIMENSIONS Unit: mm
STYLE DIMENSION
Normal Miniature L øD H ød
KNP-25 KNP50S 6.3±0.5 2.4±0.2 28±2.0 0.55±0.05
KNP-50 KNP1WS 9.0±0.5 3.3±0.3 26±2.0 0.55±0.05
KNP100 KNP2WS 11.5±1.0 4.5±0.5 35±2.0 0.8±0.05
KNP200 KNP3WS 15.5±1.0 5.0±0.5 33±2.0 0.8±0.05
KNP300 KNP5WS 17.5±1.0 6.5±0.5 32±2.0 0.8±0.05
KNP400
KNP500 KNP7WS 24.5±1.0 8.0±0.5 38±2.0 0.8±0.05
KNP700 - 24.5±1.0 8.0±0.5 38±2.0 0.8±0.05
Note: KNP1WS ( for MB Type ) ød = 0.8±0.05 mm
FEATURES
Power Rating 1/4W, 1/2W, 1W, 2W, 3W, 4W, 5W, 7W
Resistance Tolerance ±1%, ±5%
T.C.R. ±300ppm/°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.
ød
H L øD
INTRODUCTION
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 ame proof lacquer.
Wirewound Resistors
Flame-Proof Type
Normal & Miniature Style [ KNP Series ]
Rated Load (%)
Ambient Temperature (°C)
30025020015010050
100
80
60
40
20
70
3W-7W
1/4W-3WS
200 27540 °C
49
Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value
ELECTRICAL CHARACTERISTICS
NORMAL STYLE
STYLE KNP-25 KNP-50 KNP100 KNP200 KNP300 KNP400 KNP500 KNP700
Power Rating at 70°C 1/4W 1/2W 1W 2W 3W 4W 5W 7W
Dielectric Withstanding Voltage 250V 300V 400V
Resistance Range 0.1 Ω - 47 Ω0.1 Ω - 100 Ω0.1 Ω - 330 Ω0.1 Ω - 560 Ω0.1 Ω - 1K Ω
Operating Temp. Range -40°C to +200°C
Temperature Coefcient ±300ppm/°C
MINIATURE STYLE
STYLE KNP50S KNP1WS KNP2WS KNP3WS KNP5WS KNP7WS
Power Rating at 70°C 1/2W 1W 2W 3W 5W 7W
Dielectric Withstanding Voltage 200V 300V 400V
Resistance Range 0.1 Ω - 47 Ω0.1 Ω - 100 Ω0.1 Ω - 330 Ω0.1 Ω - 560 Ω0.1 Ω - 1K Ω
Operating Temp. Range -40°C to +200°C
Temperature Coefcient ±300ppm/°C
Note: Special value is available on request
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST TEST METHOD APPRAISE
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 Coefcient JIS-C-5202 5.2 -40°C to +200°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 aming
or arcing
