Approval Sheet
for
Wire Wound Resistors
Flame-Proof Type
KNP series
Customer:歐爾法
YAGEO CORPORATION
Headquarters: 3F, No.233-1, Pao Chiao Rd., Xindian, Taipei, Taiwan, R.O.C.
Tel: 886-2-6629-9999 Fax: 886-2-6628-8885
4
URL: www.yageo.com
Page-1
Rev.
Description
Issue Date
Drawn
Approved
00
issue new spec.
Mar. 20, 2018
Mingfa Liu
Feng Ye
01
Revised the dimensions for LEQ type.
May 21, 2020
Mingfa Liu
Feng Ye
02
Revised the dimensions for LEQ type.
Aug. 20, 2020
Mingfa Liu
Feng Ye
Description
Wire Wound Resistors, Flame-Proof Type
Series
KNP
Rev.
Page-2
02
1.
PRODUCT:
FLAME-PROOF WIRE WOUND RESISTORS
(Miniature Style)
Green body color
2.
PART NUMBER:
Part number of the wire wound resistor is identified by the name, power, tolerance, packing,
temperature coefficient, special type and resistance value.
Example:
KNP
(1)
Series
Name
2WS
(2)
Power
Rating
J
B
-
(3)
(4)
(5)
Resistance Packing Temperature
Tolerance Style
Coefficient
of Resistance
(1) Style: KNP SERIES
(2) Power Rating : 2WS=2W
(3) Tolerance: J=±5%
(4) Packaging Type:
B=Bulk Packing
(5) Temperature Coefficient : “-“=base on spec.
(6) Special Type:
LEQ= LEQ Type
(7) Resistance Value:E24 Series
Example: 0R1, 1R, 10R, 100R……
Page-3
LEQ
100R
(6)
(7)
Special Resistance
Type
Value
3.
BAND-CODE:
COLOR
1ST BAND
2ND BAND 3ND BAND
MULTIPLIER
TOLERANCE
0
0
0
BLACK
1Ω
BROWN
1
1
1
10Ω
±1 %( F)
RED
2
2
2
100Ω
±2% ( G)
ORANGE
3
3
3
1KΩ
YELLOW
4
4
4
10KΩ
GREEN
5
5
5
100KΩ
BLUE
6
6
6
1MΩ
VIOLET
7
7
7
10MΩ
GREY
8
8
8
0.001Ω
WHITE
9
9
9
0.0001Ω
GOLD
0.1Ω
±5 % (J )
SILVER
0.01Ω
* TOL: ± 1 % ( F )--- 5 color band.
* TOL: ± 2 % ( G )、± 5 % ( J )--- 4 color band.(3ND BAND is not included)
Remark:
(1).Multiplier band for 2%& 5% types
(2).Multiplier band for 1% types
1R1-9R9: GOLD (0.1)
1R1-9R9: SILVER (0.01)
0R1-0R99: SILVER (0.01)
0R1-0R99: GREY (0.001)
0R01-0R099: GREY (0.001)
0R01-0R099: WHITE (0.0001)
4.
ELECTRICAL CHARACTERISTICS
Miniature Style
STYLE
Power Rating at 70 ℃
Dielectric Withstanding Voltage
KNP2WS
2W
400V
Resistance Range (±1%)
0.1Ω~1.5kΩ
Resistance Range (±2%&±5%)
0.1Ω~2.2kΩ
Operating Temp. Range
- 40℃ to + 200℃
Temperature Coefficient
±300ppm/℃
* Below or over this resistance range on request.
5.
DERATING CURVE
Page-4
6.
DIMENSIONS
ψd
ψD
L
H
STYLE
DIMENSION(mm)
L
ψD
H
ψd
11.5±1.0
4.6±0.5
35±2.0
0.8±0.05
Miniature
KNP2WS
7.
ENVIRONMENTAL CHARACTERISTICS
(1) Short Time Over Load Test
At 10 times of the rated power applied for 5 seconds, the resistor should be free from defects after
the resistor is released from load for about 30 minutes
Short Time Overload Voltage =
10 * Power Rating ´ Resistance Value
The change of the resistance value should be within ± 2.0 % + 0.05Ω
(2) Voltage Proof
The resistor shall be clamped in the trough of a 90° metal V Block. Apply the insulation voltage
specified in the “Table I &II“ between the terminals connected together with the block for about 60
seconds.
The resistor shall be able to withstand without breakdown or flashover.
(3) Temperature Coefficient Test
Test of resistors above room temperature 100°C ± 2°C ( Testing Temperature 115°C to 130°C ) at
the constant temperature silicon plate for over 5 minutes. Then measure the resistance value.
The Temperature Coefficient is calculated by the following equation and its value should be within
the range of requested.
Re sistor Temperature Coefficient =
R
R0
t
to
R - R0
1
´
´ 10 6
R0
t - t0
= Resistance value under the testing temperature
= Resistance value at the room temperature
= The testing temperature
= Room temperature
(4) Insulation Resistance
Apply "measuring voltage" between protective coating and termination for 1 min.,then measure. The
measuring voltage shall be either 100V±15V d.c. for resistors with an insulation voltage lower than
500V or 500V±50V d.c. for resistors with an insulatin voltage equal to or greater than 500V.
The test resistance should be high than 100M ohm.
(5) Solderability
Immerse the specimen into the solder pot at 245 ± 5 °C for 3 ± 0.5 seconds.
At least 95% solder coverage on the termination.
(6) Solvent Resistance of Marking
The specimen into the appropriate solvent of IPA condition of ultrasonic machine for 5± 0.5 minutes.
The specimen is no deterioration of coatings and color code.
Page-5
(7) Robustness of Terminations
Direct Load – Resistors shall be held by one terminal and the load shall be gradually applied in the
direction of the longitudinal axis of the resistor unit the applied load reached the requirement.
The load shall be held for 10 seconds. The load of weight shall be ≧ 2.5 kg ( 24.5N ).
(8) Damp Heat Steady State
Place the specimen in a test chamber at 40 ± 2 °C and 90 ~ 95 % relative humidity. Apply the 0.1
times rated voltage to the specimen at the 1.5 hours on and 0.5 hour off cycle. The total length of
test is 56 days.
The change of the resistance value shall be within ± 5 % + 0.05 Ω
(9) Endurance at 70 °C
Placed in the constant temperature chamber of 70 ± 3 °C the resistor shall be connected to the lead
wire at the point of 25mm. Length with each terminal, the resistors shall be arranged not much
effected mutually by the temperature of the resistors and the excessive ventilation shall not be
performed, for 90 minutes on and 30 minutes off under this condition the rated D.C. voltage is applied
continuously for 1000+48/-0 hours then left at no-load for 1hour, measured at this time the resistance
value.
The change of the resistance value shall be within ± 5 % + 0.05 Ω.
There shall be no remarkable change in the appearance and the color code shall be legible after the
test.
(10) Temperature Cycling Test
The temperature cycle shown in the following table shall be repeated 5 times consecutively. The
measurement of the resistance value is done before the first cycle and after ending the fifth cycle,
leaving in the room temperature for about 1 hour.
Temperature Cycling Conditions:
Step
1
2
3
4
Temperature(°C)
-40 ± 3
25 ± 3
200 ± 3
25 ± 3
Time (minute)
30
10 ~ 15
30
10 ~ 15
The change of the resistance value shall be within ± 1.0 % + 0.05 Ω
After the test the resistor shall be free from the electrical or mechanical damage.
(11) Resistance to Soldering Heat
The terminal lead shall be dipped into the solder pot at 260 ± 3 °C for 10 ± 1.0 seconds up to 2.5 ~
3.5 mm.
The change of the resistance value shall be within ± 1.0 % + 0.05 Ω
(12) Overload Flame Retardant
At 4 times of the rated voltage ( If the voltage exceeds the maximum load voltage, the maximum
load voltage will be used as the rated voltage ) applied for 1 minute
Overload Test Voltage =
4 * Power Rating ´ Resistance Value
The resistor shall be able to no evidence of flaming or arcing.
Page-6
8.
SPECIAL TYPE
LEQ TYPE
Unit: mm
9.
Plant Address
A.
China Dongguan Plant
7-1, Gaoli Road, Gaoli Industrial Zone
Tangxia Zhen, Dongguan, Guangdong, China
(廣東省東莞市塘廈鎮高麗工業區高麗路 7-1 號)
Tel. 86-769-8772 0275
Fax. 86-769-8772 0275 #4333
B.
China Mudu Plant
No.158, Fengjiang Road,
Mudu New District, Suzhou, Kiangsu, China
(江蘇省蘇州木瀆新區楓江路 158 號)
Tel. 86-512-6651 8889
Fax. 86-512-6651 9889
Page-7
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