Products › Power Resistors › Flat Ceramic Tube Wirewound Resistors
Flat Ceramic Tube Wirewound Resistors
- Low TCR & inductance
- Suitable for circuit current sensing
- High power, good heat dissipation
- Custom designs available
Applications: Frequency converters, charging stations, load banks, large ovens, welding machines, power equipment, burn-in equipment, and elevator braking
Dimensions & Specifications
| Rated power | B | C | P | D | E | F | G | H | I | Resistance range | Tolerance |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 80W | 124±2 | 140±2 | 159±2 | 170±0.2 | 28±1 | 46±1 | 15±1 | 10±1 | 21.5±1 | 5.1Ω ~ 4.7kΩ | ±5%; ±10% |
| 100W | 144±2 | 160±2 | 179±2 | 190±0.2 | 28±1 | 46±1 | 15±1 | 10±1 | 21.5±1 | 5.1Ω ~ 4.7kΩ | ±5%; ±10% |
| 200W | 192±2 | 210±2 | 229±2 | 240±0.2 | 35±1 | 55±1 | 20±1 | 10±1 | 21.5±1 | 5.1Ω ~ 4.7kΩ | ±5%; ±10% |
| 250W | 236±2 | 254±2 | 273±2 | 284±0.2 | 35±1 | 55±1 | 20±1 | 10±1 | 21.5±1 | 5.1Ω ~ 4.7kΩ | ±5%; ±10% |
| 300W | 282±2 | 300±2 | 319±2 | 330±0.2 | 35±1 | 55±1 | 20±1 | 10±1 | 21.5±1 | 5.1Ω ~ 4.7kΩ | ±5%; ±10% |
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Dimensions in mm.
If the rated voltage exceeds the maximum working voltage, use the maximum working voltage.
Electrical Characteristics
| Test item | Technical requirement |
|---|---|
| Initial resistance R and tolerance | 1Ω ≤ R: ±5% (J); 1Ω > R: ±10% (K) |
| Temperature coefficient | ±200ppm/°C max. |
| Rated load | |ΔR| ≤ (1% × R) + 0.05Ω; surface temperature rise 350°C max. |
| Short-time overload | 10 × rated power for 5 seconds; |ΔR| ≤ (2% × R) + 0.05Ω |
| Insulation resistance | DC500V; 100MΩ min. |
| Dielectric withstand voltage | AC2000V; 1 minute |
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Technical Details
Load Derating Curve
Y axis: Rated Power (%)
X axis: Ambient Temperature (°C)
Surface Temperature Rise Curve
Y axis: Temperature (°C)
X axis: Load Ratio (%)
Product Structure
- A: Mounting bracket
- B: Lead terminal
- C: Resistance wire
- D: Ceramic former
- E: Insulating coating
