NKNP Non-Inductive Wound Resistors Flameproof
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NKNP Non-Inductive Wound Resistors Flameproof

NKNP Non-Inductive Wound Resistors Flameproof Features: 1. Very low inductance ( less than 1 H ). 2. Flameproof painting, resistant to heat & solvents. 3. Super heat dissipation, small linear temperature coefficient. 4. Instant overload capability, low noise figure and low annual shift on resistance values.

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Product Description

NKNP Non-Inductive Wound Resistors Flameproof



Products

NKNP Non-Inductive Wound Resistors Flameproof

Features

1. Very low inductance ( less than 1 H ).

2. Flameproof painting, resistant to heat & solvents.

3. Super heat dissipation, small linear temperature coefficient.

4. Instant overload capability, low noise figure and low annual shift on resistance values.




Electrical And Mechanical Performance of NKNP Non-Inductive Wound Resistors Flameproof​:


Characteristics

Standards

Test Methods

Resistance Tolerance

±5%(J)or ±2%(F)

-

Resistance Temp. Coeff.

±300 ppm/°C

-55°C ~ 200°C

Power Rating Load

Surface temp. 275°C Max.ΔR/R≤±2%

Rated voltage for 30 minutes

Short Time Overioad

±2%

2.5 times of rated wattage for 5 seconds.

Dielectric Withstanding Voltage

No evidence of mechanical damage or insulation breakdown.

 

Applying suitable voltage listed on

Dimensions for one minute.

Insulation Resistance

10,00MΩ

DC100V or 500V megger

Terminal Strength

 

No evidence of mechanical damage.

 

< 1W:1 kg

> 2W: 2.5 kg

Solder-ability

Minimum95%coverage

235 ± 5°C for 2 seconds

Resistance to Soldering Heat

No evidence of mechanical damage.ΔR/R≤±1%

270±5°C for 10 ±1 seconds

350±10°C for3.5 ±0.5seconds




Environmental Characteristics of NKNP Non-Inductive Wound Resistors Flameproof​:


Characteristics

Standards

Test Methods

Temp. Cycle

△R/R≤±1%

-55°C( 30 min.) —►Room Temp.( 3 min.) —► +200°C( 30 min.)

 —► Room Tenp.( 3 min.) / ( 5 cycles)

Load Life

△R/R≤±3%

Rated power load 90 minutes ON 30 minutes OFF

70°C 1000 hours

Moisture-proof Load Life

△R/R≤±3%

Rated power load 90 minutes ON 30 minutes OFF

40°C95%RH500 hours

Nonflammability

not flamed

16 times of rated wattage for 5 min.




Dimensions of NKNP Non-Inductive Wound Resistors Flameproof​:


Rated Wattage

D±1

L±1

H±3

d±0.1

Resistance Range(Ω)

Dielectric Withstanding Voltage

1/2W

3.0

9

28

0.65

0.1-3

300V

1W

4.0

9

28

0.65

0.1-3

350V

2W

5.0

11

28

0.8

0.1-10

350V

3W

5.5

13

38

0.8

0.1-10

350V

3WL

5.5

15

38

0.8

0.1-10

350V

5W

6.5

19

38

0.8

0.1-20

350V

6W

8.5

24

38

0.8

0.1-20

500V

7W

8.5

32

33

0.8

0.1-20

500V

8W

8.5

41

38

0.8

0.1-20

750V

10W

8.5

53

38

0.8

0.1-20

800V






Derating Curve of NKNP Non-Inductive Wound Resistors Flameproof​:


For resistors operated in ambient temperatures above 70°C , power rating must be derated in accordance with the curve below.






Surface Temperature Rise of NKNP Non-Inductive Wound Resistors Flameproof​:

 





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