WIREWOUND RESISTORS (RW SERIES - KNP ; WWK)

 
Features
 
  • Formed by winding a resistance wire around an alkaliless ceramic base.

  • Is coated with a non-corrosive, high insulating, non-flammable material.

  • Super heat dissipation, small linear temperature coefficient.

  • Low noise.

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Characteristic Performance
 

Item

Performance

Operating Temp. Range -55J ~ +155J
Temperature Coefficient

Within ±300PPM/J

Short Time Overload

Within ±(2%+0.05[), no evidence of mechanical damage.

Insulation Resistance

103M[ or more

Dielectric Withstanding Voltage

No evidence of flashover mechanical damage, arcing or insulation breakdown.

Pulse Overload

Within ±(2%+0.05[)

Terminal Strength

No evidence of mechanical damage.

Resistance to Soldering Heat

Within ±(2%+0.05[), no evidence of mechanical damage.

Solderability

Covered with new solder by 95% at least.

Resistance to Solvent

No deterioration of protective coating and markings.

Temperature Cycle

Within ±(2%+0.05[), no evidence of mechanical damage.

Load Life in Humidity

Within ±(5%+0.05[)

Load Life

Within ±(5%+0.05[)

Flammability

No evidence of flame.

 
Derating Curve
 

 
Structure & Materials
 

 

No.

Item Material

1

Lead Wire

Soldered or tinned annealed copper wire.

2

Connection

The lead wire, which is plated with solder, shall be mounted to the caps by welding process.

3

Terminal

Tinned iron cap.

4

Ceramic Core

High alumina ceramic is used.

5

Resistance Element

The resistor element consists of heat resistant wire of nickel alloy.

6

Insulation Coating

Silicone resin is used. Accord with UL94 V-0 nonflammable specification.

7

Indication

Color code.

 
Dimensions
 

 
Style Power Rating Dimensions (mm) Dielectric Withstanding Voltage Resistance Range

L

D

d H
KNP 1/4W 0.25W 6.50 ± 0.50 2.50 ± 0.50 0.50 ± 0.50

28.00 ± 3.00

250V

0.1[ ~ 27[

KNP 1/2WS 0.5W 6.50 ± 0.50 2.50 ± 0.50 0.50 ± 0.50

28.00 ± 3.00

250V

0.1[ ~ 27[

KNP 1/2W 0.5W 9.00 ± 1.00 3.20 ± 0.50 0.60 ± 0.10

28.00 ± 3.00

350V

0.1[ ~ 39[

KNP 1WS 1W 9.00 ± 1.00 3.20 ± 0.50 0.60 ± 0.10

28.00 ± 3.00

350V

0.1[ ~ 39[

KNP 1W 1W 12.00 ± 1.00 4.50 ± 0.50 0.65 ± 0.10

32.00 ± 3.00

500V

0.1[ ~ 50[

KNP 2WS 2W 12.00 ± 1.00 4.50 ± 0.50 0.65 ± 0.10

32.00 ± 3.00

500V

0.1[ ~ 50[

KNP 2W 2W 15.50 ± 1.00 5.00 ± 1.00 0.70 ± 0.10

35.00 ± 3.00

500V

0.1[ ~ 120[

KNP 3WS 3W 15.50 ± 1.00 5.00 ± 1.00 0.70 ± 0.10

35.00 ± 3.00

500V

0.1[ ~ 120[

KNP 3W 3W 17.50 ± 1.00 6.50 ± 1.00 0.70 ± 0.10

35.00 ± 3.00

500V

0.1[ ~ 200[

KNP 5WS 5W 17.50 ± 1.00 6.50 ± 1.00 0.70 ± 0.10

35.00 ± 3.00

500V

0.1[ ~ 200[

KNP 5W 5W 24.50 ± 1.00 9.00 ± 1.00 0.70 ± 0.10

32.00 ± 3.00

500V

0.1[ ~ 470[

Note: Special specification can be constructed on request, except the resistance value is less than 0.22[ at 1% tolerance.

 
How to Order
 

Ex.: KNP1/2W-T52-10RJ

 
KNP 1/2W

V

T52

V

10R J
   
Product Style (Type) Rated Power (Watts)   Form Type   Resistance Value Resistance Tolerance

KNP

or

WWK

  

 

  

 

  

 

  

 

Normal

Small

1/4W

1/2WS

1/2W

1WS

1W

2WS

2W

3WS

3W

5WS

5W

 

 

B :

 Bulk

Txx :

 Taping XXmm

PU :

 Horizontal

PF :

 Vertical

KC :

 Vertical

  

 

  

 

 

(R = [)

E-12 Series

E-24 Series

E-48 Series

E-96 Series

  

  

K :

  ±10%

J :

  ±5%

G :

  ±2%

F :

  ±1%

  

  

  

 

 


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