TOKEN
KNPN Non-inductive Resistors
Non-inductive
Wirewound Resistors
Non-inductive Wirewound Resistors
Improves Inductance for High Frequency Applications
Preview
Token Electronics has introduced a non-inductive version KNPN Series of conformal coated, leaded wire-wound
resistors.
The KNPN series offers the expected performance of a wire wound resistor with the added characteristic of
vastly improved inductance, making it suitable for high-switching applications.
Wirewound technology has long been known as a leading technology for power resistor needs though it is
inherently inductive. Known as Ayrton Perry winding, a non-inductively wound wirewound has one winding in
one direction and one in the other direction.
By using a non-inductively wound version this greatly reduces the inductance of any given resistor size and value
combination; however, it does not completely eliminate the inductance.
This non-inductive winding is available in all standard KNPN sizes from 0.5 watts up to 6 watts with options
1%, 2% and 5% tolerance. The KNPN series is RoHS compliant and also can be supplied with radial, goalpost or
lancet preformed leads.
To address your need for technical and economic success in a timely manner, our custom solutions are available.
Contact us with your specific needs.
Applications
- Power tools
- Current sensing
- Consumer applications
- Power supplies, Welders
- High voltage applications
- High-switching applications
- Home entertainment, appliances
Features
- Low cost
- Excellent pulse load capability
- Non-inductive Ayrton Perry winding
- A wide resistance range 0.1Ω to 50Ω
- Operating temperature range -55°C ~ 155°C
- A wide range of power ratings 0.5W to 6W
- Products with Pb-free Terminations and RoHS compliant
Version 2010
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01 of 03
TOKEN
General Specifications
P
KNPN Non-inductive Resistors
L
D
Type
KNPN-50
KNPN-100
KNPN-100B
KNPN-200
KNPN-200B
KNPN-300
KNPN-400
KNPN-500
KNPN-500B
KNPN-600
Rated
Watts
1/2W
1W
1W
2W
2W
3W
4W
5W
5W
6W
KNPN
D ± 0.5
4
4
4.5
4.5
5.5
5.5
6.5
6.5
8.5
8.5
Dimensions (mm)
L±1
H±3
d ± 0.05
9.0
26
0.50~0.55
9.0
26
0.50~0.55
11.5
26
0.75~0.80
11.5
26
0.75~0.80
15.5
35
0.75~0.80
15.5
35
0.75~0.80
17.5
35
0.75~0.80
17.5
35
0.75~0.80
24.5
38
0.75~0.80
24.5
38
0.75~0.80
Resistance
Range (Ω)
0.1-10 Ω
0.1-10 Ω
0.1-10Ω
0.1-10 Ω
0.1-20Ω
0.1-20 Ω
0.1-30 Ω
0.1-30 Ω
0.1-50 Ω
0.1-50 Ω
Tolerance
± 1%
± 2%
± 5%
Application Notes
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.
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Electrical Performance
KNPN Non-inductive Resistors
Rated Power Ratio
100
80
60
40
20
0
-55
70
155
-50 -25
0
25 50 75 100 125 150 175 200 225 250 275 280
Ambient Temperature °C
TEST ITEMS
Operating Temperature Range
Resistance Temp. Coeff.
Short Time Overload
Rated Load
Voltage Withstanding
Temperature Cycling
CONDITION
-55 °C ~ 275 °C (0W)
Room temperature/100 °C up
10 times of rated wattage for 5 sec.
Rated wattage 30 min.
500VAC 1 min
-20 °C ~ 85 °C 5 cycles
SPEC
± 300 PPM / °C
±2%
±1%
±1%
±1%
How to Order
KNPN-100
Part Number: KNPN
Rated Power (W)
Resistance Value (Ω)
Code
1W
10R
J
Code
F
G
J
P
Resistance Tolerance
Resistance Tolerance (%)
±5%
±5%
±5%
Package
Resistance Value
0R1
1R
10R2
10R
12R
0.1Ω
1Ω
1.2Ω
10Ω
12MΩ
Package
Code
TB
P
Taping Box
Bulk
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Version 2010
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