FRN Fusible Resistors Flameproof Small Type Features: 1. High power, Small body size. 2. It is suitable for protecting circuit boards. 3. Noncombustible insulating coating,“Solvent” Proof and resistant to high temperature. 4. Low temperature coefficient (<±200ppm/°C). 5. Uniform in fusing time. 6. UL approval FRN 1/2 Series.
FRN Fusible Resistors Flameproof Small Type
Products | FRN Fusible Resistors Flameproof Small Type |
Features | 1. High power, Small body size. 2. It is suitable for protecting circuit boards. 3. Noncombustible insulating coating,“Solvent” Proof and resistant to high temperature. 4. Low temperature coefficient (<±200ppm/°C). 5. Uniform in fusing time. 6. UL approval FRN 1/2 Series. |
Electrical And Mechanical Performance of FRN Fusible Resistors Flameproof Small Type:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J)or±1% ( F )
| - |
Resistance Temp. Coeff. | ±200 ppm/°C;
| -55°C ~ 155°C
|
Power Rating Load | Surface temp.200°C Max.ΔR/R≤±2% | Rated voltage for 30 minutes |
Short Time Overioad | ±2% | 4times 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 100V megger
|
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 FRN Fusible Resistors Flameproof Small Type:
Characteristics | Standards | Test Methods |
Temp. Cycle | △R/R≤±1% |
-55°C( 30 min.) —►Room Temp.( 3 min.) —► +155°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 FRN Fusible Resistors Flameproof Small Type:
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance Range(Ω) | Max. Working Voltage | Dielectric Withstanding Voltage |
1/2W | 2.6±0.5 | 6.8 | 28 | 0.6 | 0.22-100K | 250V | 250V |
3/4W | 3.0 | 9 | 28 | 0.65 | 0.22-100K | 300V | 300V |
1W | 3.5 | 9 | 28 | 0.65 | 0.22-100K | 300V | 350V |
2W | 4.5 | 11 | 28 | 0.8 | 0.22-100K | 350V | 350V |
3W | 5.0 | 15 | 28 | 0.8 | 0.22-100K | 500V | 350V |
Derating Curve of FRN Fusible Resistors Flameproof Small Type:
For resistors operated in ambient temperatures above 70°C , power rating must be derated in accordance with the curve below.
Surface Temperature Rise of FRN Fusible Resistors Flameproof Small Type:
