Products › Wirewound Resistors › Wirewound Resistors
Wirewound Resistors
- High surge & impact resistance
- High load capacity, high power
- Good high-frequency performance, low noise
- Tolerance: ±1%, ±2%, ±5%
- Non-flammable, good heat dissipation
Applications: Industrial control, new energy, household appliances, laboratory equipment, electric meters
Dimensions & Specifications
| Rated Power: Standard | Rated Power: Miniature | φD (mm) | L (mm) | H (mm) | φd (mm) | KNP Resistance Range | NKNP Resistance Range |
|---|---|---|---|---|---|---|---|
| 1/4W | 1/2WS | 2.3±0.5 | 6.0±1.0 | 27±3 | 0.40±0.1 | 0.05Ω–51Ω | 0.05Ω–1Ω |
| 1/2W | 1WS | 3.5±0.5 | 9.0±1.5 | 25±2 | 0.50±0.1 | 0.05Ω–68Ω | 0.05Ω–2Ω |
| 1W | 2WS | 4.5±0.5 | 11.5±1.5 | 24±3 | 0.60±0.1 | 0.05Ω–220Ω | 0.05Ω–8Ω |
| 2W | 3WS | 5.0±1.0 | 15.5±1.5 | 27±3 | 0.65±0.1 | 0.05Ω–330Ω | 0.05Ω–10Ω |
| 3W | 5WS | 6.0±1.0 | 15.5/17.5±1.5 | 32±3 | 0.70±0.1 | 0.05Ω–390Ω | 0.05Ω–20Ω |
| 5W | 7WS | 8.0±1.0 | 24.5±1.5 | 33±3 | 0.75±0.1 | 0.05Ω–470Ω | 0.05Ω–20Ω |
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If the rated voltage exceeds the maximum working voltage, use the maximum working voltage.
Electrical Characteristics
| Test Item | Technical Requirements | Test Conditions / Standard |
|---|---|---|
| Operating temperature range | -55°C to +155°C | |
| Temperature coefficient | ±350ppm/°C (±500ppm/°C for R < 1Ω) | Test temperature: room temperature +100°C |
| Short-time overload | ±(1%+0.05Ω) | 2.5 times rated voltage for 5 seconds |
| Temperature cycling | ±(5%+0.1Ω) | -55°C to +155°C, 5 cycles |
| Moisture resistance under load | ±(5%+0.1Ω) | 40°C, 95%RH; rated voltage applied for 1.5 hours ON, 0.5 hours OFF, for 1000 hours |
| Load life | ±(5%+0.1Ω) | 70°C; rated voltage applied for 1.5 hours ON, 0.5 hours OFF, for 1000 hours |
| Solderability | Coverage of at least 95% | 255°C for 3 seconds |
| Resistance to soldering heat | ±(1%+0.05Ω) | 350°C for 3 seconds |
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Test standard: GB/T5729 (JIS5202)
Technical Details
Product Structure
- A: End cap
- B: Ceramic core
- C: Resistance wire
- D: Insulating coating
- E: Color-code bands
- F: Lead
- G: Identification band
Black band: inductive. Green band: non-inductive.
