KNP Wire Wound Resistors Flameproof Features: 1. Super heat dissipation small linear temperature coefficient. 2. Instant overload capability low noise figure and low annual shift on resistance values. 3. Flameproof, light weight, price is lower than enamel types. 4. Winding wires are much more durable than enamel types which are produced in high temperature.
KNP Wire Wound Resistors Flameproof
Products | KNP Wire Wound Resistors, Flameproof |
Features | 1. Super heat dissipation small linear temperature coefficient. 2. Instant overload capability low noise figure and low annual shift on resistance values. 3. Flameproof, light weight, price is lower than enamel types. 4. Winding wires are much more durable than enamel types which are produced in high temperature. |
Electrical And Mechanical Performance of KNP Wire Wound Resistors Flameproof:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J)or ±1%(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% | 10 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 KNP 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≤±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%RH1000 hours |
Nonflammability
| not flamed
| 16 times of rated wattage for 5 min.
|
Dimensions of KNP Wire Wound Resistors Flameproof:
Rated Wattage | D±1 | L±1 | H±3 | d±0.1 | Resistance Range(Ω) | Dielectric Withstanding Voltage |
1/4W | 2.6±0.5 | 6.8 | 28 | 0.6 | 0.1-200 | 250V |
1/2W | 3.0 | 9 | 28 | 0.65 | 0.1-300 | 350V |
1W | 4 | 9 | 28 | 0.65 | 0.1-500 | 350V |
2W | 5.0 | 11 | 28 | 0.8 | 0.1~1K | 500V |
3W | 5.5 | 13 | 38 | 0.8 | 0.1~1K | 500V |
3WL | 5.5 | 15 | 38 | 0.8 | 0.1~1.2K | 500V |
5W | 6.5 | 19 | 38 | 0.8 | 0.1~1.2K | 500V |
6W | 8.5 | 24 | 38 | 0.8 | 0.1~1.5K | 500V |
7W | 8.5 | 32 | 33 | 0.8 | 0.1~1.5K | 500V |
8W | 8.5 | 41 | 38 | 0.8 | 0.1 ~2.2K | 800V |
10W | 8.5 | 53 | 38 | 0.8 | 0.1~3.3K | 1000V |
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 of KNP Wire Wound Resistors Flameproof:
