FKN Fusible Wire Wound Resistors Flameproof Features: 1. It is suitable for protecting circuit boards. 2. Noncombustible insulating coating;“Solven”t proof and resistant to high temperature. 3. Low temperature coefficient. 4. Uniform in fusing time.
FKN Fusible Wire Wound Resistors Flameproof
Products | FKN Fusible Wire Wound Resistors Flameproof |
Features | 1. It is suitable for protecting circuit boards. 2. Noncombustible insulating coating;“Solven”t proof and resistant to high temperature. 3. Low temperature coefficient. 4. Uniform in fusing time. |
Electrical And Mechanical Performance of FKN Fusible Wire Wound Resistors Flameproof:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J)or±2% (G )
| - |
Resistance Temp. Coeff. | ±300 ppm/°C;
| -55°C ~200°C
|
Power Rating Load | Surface temp.275°C Max.ΔR/R≤±3% | Rated voltage for 30 minutes |
Short Time Overioad | ±2% | 2.5times 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 | DC 100Vor 500Vmegger
|
Fusing Characteristics
| Fusing time is within 60 seconds.
| 16 times of rated wattage
|
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 ±0.5 seconds |
Environmental Characteristics of FKN Fusible Wire 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≤±5% | Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours |
Moisture-proof Load Life | △R/R≤±5% | Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH1000 hours |
Nonflammability
| not flamed | 16 times of rated wattage for 5 min. |
Dimensions of FKN Fusible Wire Wound Resistors Flameproof:
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance Range(Ω) | Dielectric Withstanding Voltage |
1W | 4.0 | 9 | 28 | 0.65 | 0.1-20 | 350V |
2W | 5.0 | 11 | 28 | 0.8 | 0.1-100 | 500V |
3W | 5.5 | 13 | 38 | 0.8 | 0.1-200 | 500V |
3W | 6.5 | 19 | 38 | 0.8 | 0.1-200 | 500V |
Derating Curve of FKN Fusible Wire 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 FKN Fusible Wire Wound Resistors Flameproof: