RX21 wirewound resistors
Factory Direct · RX21 wirewound resistors
Eco-friendly insulating green coating · withstand voltage 300V ~ 1000V — for precision instruments / telecom equipment
Surface is coated with eco-friendly insulating green paint; withstand voltage 300V–1000V
The resistor body is coated with eco-friendly insulating green paint, providing excellent insulation; single-unit withstand voltage reaches 300V ~ 1000V for safe, reliable operation in medium- and high-voltage circuits.
copper leadsandresistor porcelain bodybonded tightly, EnsuresResistor stable
Uses premium copper leads bonded tightly to the ceramic resistor substrate via a lamination process; secure connection and reliable electrical contact; genuine materials, long-term useminimal resistance drift, stable performance.
Dimensions
| Power (W) | Resistance Range | L ±1 (mm) | D ±0.5 (mm) | d ±0.05 (mm) | H ±0.5 (mm) |
|---|---|---|---|---|---|
| 1W | 0.1Ω ~ 510Ω | 10 | 3.5 | 0.7 | 25 |
| 2W | 0.1Ω ~ 510Ω | 14 | 4.5 | 0.7 | 25 |
| 3W | 0.1Ω ~ 510Ω | 16 | 5.5 | 0.7 | 28 |
| 4W | 0.1Ω ~ 510Ω | 16 | 5.5 | 0.7 | 28 |
| 5W | 0.1Ω ~ 5kΩ | 23 | 7.5 | 0.78 | 28 |
| 6W | 0.1Ω ~ 5kΩ | 23 | 7.5 | 0.78 | 28 |
| 7W | 0.1Ω ~ 5kΩ | 31 | 7.5 | 0.78 | 28 |
| 8W | 0.1Ω ~ 10kΩ | 31 | 7.5 | 0.78 | 28 |
| 9W | 0.1Ω ~ 10kΩ | 31 | 7.5 | 0.78 | 28 |
| 10W | 0.1Ω ~ 10kΩ | 36 | 8.5 | 0.78 | 28 |
| 15W | 0.1Ω ~ 10kΩ | 52 | 7.5 | 0.78 | 28 |
Rated Power Derating Curve
Electrical Characteristics
| Item | Performance Requirement Performance Requirement | Test Method Test Methods |
|---|---|---|
| TCR Temperature Coefficient | ±300 PPM/℃ | JIS C 5202 §5.2 |
| Short Time Overload | ΔR ≤ ±(2%R₀ + 0.05Ω) | JIS C 5202 §5.5 |
| Nonflammability | No visible flame | JIS C 5202 §4.2 |
| Solderability | Solder coverage ≥95% | JIS C 5202 §6.5 |
| Load Life | ΔR ≤ ±(5%R₀ + 0.1Ω) | JIS C 5202 §7.1 |
48-Hour Free Samples
Free samples for standard parts — shipped within 2 business days.
Custom to Drawing
Drawing- and spec-based customization. Engineer responds within 24 hours.
Volume Discounts
Factory-direct supply at scale — direct manufacturer pricing.
Worry-Free After-Sales
12-month warranty with a dedicated team for technical issues.
Customization Process
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Production
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Delivery
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Frequently asked questions
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Sample Request
Standard samples are provided free of charge in reasonable quantities (shipped within 2–3 business days). Custom samples are delivered within 2–4 weeks. Please use the form on the right to tell us:
- Company and contact details
- Target part number or key specs (power / resistance / package)
- Application scenario and estimated annual volume
- Shipping address and expected delivery date