НКНП Неиндуктивни Рана Резистори Огноотпорен Карактеристики: 1 Многу ниско индуктивност ( помалку од 1 Н ) 2. Огноотпорен сликање, отпорен до топлина И растворувачи. 3. Супер топлина дисипација, мал линеарно температура коефициент. 4. Инстант преоптоварување способност, ниско бучава фигура и ниско годишно смена на отпор вредности.
NKNP Non-Inductive Wound Resistors Flameproof
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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:
|
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. |
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Dielectric Withstanding Voltage |
No evidence of mechanical damage or insulation breakdown.
|
Applying suitable voltage listed on Dimensions for one minute. |
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Insulation Resistance |
10,00MΩ |
DC100V or 500V megger |
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Terminal Strength
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No evidence of mechanical damage.
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< 1W:1 kg > 2W: 2.5 kg |
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Solder-ability |
Minimum95%coverage |
235 ± 5°C for 2 seconds |
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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:
|
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 |
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Moisture-proof Load Life |
△R/R≤±3% |
Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH500 hours |
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Nonflammability |
not flamed |
16 times of rated wattage for 5 min. |
Dimensions:
|
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 :
For resistors operated in ambient temperatures above 70°C , power rating must be derated in accordance with the curve below.
Surface Temperature Rise:
