TOKEN
KNP-R Power Wirewound Resistors
Power Precision
Wirewound Resistors
Wirewound Resistors
Boast Consistent Precision Power Operation
Preview
Token’s highest quality conformal axial terminal ceramic-silicone coated KNP-R power resistors for applications
requiring high stability and precision. The KNP-R wire-wound has a low temperature coefficient and maintain a
high degree of stability under demanding conditions.
The power precision KNP-R series meeting MIL-R-26E (U and V characteristics) and surface temperature (hot
spot) 375°C max. Resistors with a wide range of 0.01Ω ~ 82kΩ, covering applications from precision to power.
Products with lead-free terminations meet EU RoHS and China RoHS requirements.
Characteristics U :
275°C Maximum hot spot temperature. 1% Maximum ΔR in 1000 hours load life.
Characteristics V :
375°C Maximum hot spot temperature. 3% Maximum ΔR in 1000 hours load life.
Operating temperature range is -55°C ~ +375°C and derated power at high ambient temperatures as according
to the chart below. Token is equipped to design and produce custom components to meet many design and
reliability demands. In addition to standard military-grade resistor products, we also have many resistive products
designed to meet various source-controlled drawings.
Contact us with your specific needs.
Features
- Excellent load life stability
- High Precision and reliability
- Axial ceramic-silicone coated
- Meets the Standards of MIL-R-26E
- RoHS compliant with 100% lead free
Applications
- Radar, Ground Vehicles
- Communications systems
- Bias supply, Current shunts, Voltage dropping
- Motor speed controls, Voltage divider networks
- Medical instrumentation and Medical implantables
Version 2010
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01 of 03
TOKEN
Technical Specifcations
KNP-R Power Wirewound Resistors
Power Derating Curve
100
Rated Power (%)
80
60
40
20
0
-55
25
75
125
175
225
275
325
375
U
V
d
38±3
L
38±3
D
Type
KNP-R1/4
KNP-R1/2
KNP-R1A
KNP-R1
KNP-R2A
KNP-R2
KNP-R3A
KNP-R3
KNP-R4
KNP-R5
KNP-R7
KNP-R10
MIL Power Rating Max. Working
Resistance Range (Ω)
Dimensions (mm)
(W)
Voltage (V)
-
R-26E
U
V
U
V
0.1% 0.25% 0.5% 1% 2% 3% 5%
L±0.81 D±0.81 d±0.1
-
0.40
-
20
-
10~950
1~3.4K
6.35
1.98
0.51
RW70 0.75
-
29
-
10~1.3K
1~4.9K
7.92
1.98
0.51
-
1.00
-
53
-
1~2.7K
0.1~10.4K
10.31
2.36
0.64
RW69
1.10
-
62
-
1~4.0K
0.1~15K
13.49
2.36
0.64
-
2.50 3.25
138
157
1~8.6K
0.01~32.3K
12.70
5.33
0.81
RW79
3.00 3.75 135
148
1~5K
0.01~2K
13.49
4.06
0.81
-
3.00 3.75 135
148
1~6.5K
0.01~34.5K
14.27
5.33
0.81
-
3.25 4.75
185
220
1~11.4K
0.01~42.1K
20.62
5.33
1.02
RW67 4.00 5.50 210
250
1~12.7K
0.01~47.1K
15.88
7.62
1.02
RW74 5.00 6.50 330
376
0.5~24.5K
0.01~51K
22.22
7.62
1.02
RW68
7.00
9.00
504
576
0.5~41.4K
0.01~75K
30.94
9.52
1.02
RW78
10.00
799
911
0.5~71.3K
0.01~82K
45.21
9.52
1.02
Temperature Coefficient: 1 Ω and below ± 150 ppm/°C, 1 Ω to 9.9 Ω ± 100 ppm/°C, 10 Ω and above ± 100 ppm/°C,
(50 ppm/°C on request)
Electrical Performance
Test Items
Short Time Overload
Rated Load
Voltage Withstanding
Insulation Resistance
Temp. Cycle
Soldering After Resistance
Incombustibility
Load Life
Test Method
2.5 times of rated voltage 5 sec.
Rated wattage 30 minutes.
500VAC 1 minute.
500V
-20°C ~ 85°C 5 cycles
235°C for 3 sec
16 times of rated wattage for 5 min.
+25°C, 1.5Hrs on ~ 0.5Hrs
off cycle, 1000 Hrs.
Specifications
ΔR±(2%+0.05Ω)
ΔR±(1%+0.05Ω)
ΔR±(1%+0.05Ω)
20MΩ
ΔR±(1%+0.05Ω)
ΔR±(0.5%+0.05Ω)
Not flamed
U: ΔR±(1%+0.05Ω)
V: ΔR±(3%+0.05Ω)
02 of 03
http://www.token.com.tw/
rfq token.com.tw
Version 2010
TOKEN
Application Notes
KNP-R Power Wirewound Resistors
Wire-wound Resistors Application Notes:
● When being used in AC circuits, some wirewound structures give inductance ingredients or parasitic
capacity, so they may cause unusual phenomena such as oscillations etc. Quorum deviations of other com-
ponents should be carefully taken into account for use.
● Application and Placement: Wire wound resistors use different gauges of wire as resistance elements.
Sometimes the gauge is extremely thin (finer than a strand of human hair) and very susceptible to breakage
in environments containing salts, ash, dust and corrosives. Avoid utilization in such environments.
● Do not install in dusty areas because the accumulation will cause shorts and poor conductance.
How to Order
KNP-R3A
Part Number: KNP-R
Characteristic (°C)
Code
U
100R
B
P
Resistance Tolerance (%)
Code
B
C
D
F
G
H
J
Resistance Tolerance
±0.1%
±0.25%
±0.5%
±1%
±2%
±3%
±5%
Package
Resistance Value (Ω)
U
V
Resistance Value (Ω)
Code
0R1
1R
100R
1K
275°C
375°C
Resistance Value
1.0Ω
1Ω
100Ω
1000Ω
Package
Code
TB
P
Taping Box
Bulk
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Version 2010
http://www.token.com.tw/
rfq token.com.tw
03 of 03
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