The RX21 Type coating wire wound power resistor is a high-performance electronic component designed for demanding industrial and commercial applications. Featuring a ceramic core with precision wire winding and protective coating, this RX21 resistor ensures excellent heat dissipation, high stability, and long-term reliability in power circuits.
Superior Thermal Performance
RX21 resistor withexcellent heat dissipation through ceramic core construction
Maintains stable resistance values even under continuous high-load conditions
High-temperature silicone coating ensures reliable operation up to 275°C
Enhanced Durability & Reliability
Robust wire winding technology provides exceptional mechanical strength
Moisture-resistant and chemical-proof coating protects against harsh environments
UL94 V-0 flame retardant certification guarantees safety in demanding applications
Precision Engineering
Tight tolerance options (±1%, ±2%, ±5%) for critical circuit requirements
Low temperature coefficient ensures minimal resistance drift
Non-inductive design reduces electromagnetic interference in sensitive applications
Long-Term Stability
Proven performance in accelerated life testing scenarios
Consistent electrical characteristics over extended operational periods
Minimal aging effect for reduced maintenance requirements
| Type | Rated Power (W) | Resistance range (Ω) | Dimensions (mm) | ||
| L | D | d | |||
| RX21-0.5 | 0.5 | 0.10~560 | 10±1 | 3.5±0.5 | 0.6 |
| RX21-(1) | (1) | 0.1~1k | 14±1 | 3.5±0.5 | 0.8 |
| RX21-2 | 2 | 0.15~5.1k | 16±1 | 6±1 | 0.8 |
| RX21-4 | 4 | 0.15~10k | 26±2 | 9±1 | 0.8 |
| RX21-8 | 8 | 0.15~33k | 34±2 | 10± | 1 |
| RX21-(12) | (12) | 1~33k | 46±2 | 10± | 1 |
| RX21-(15 | (15) | 1-39k | 52±2 | 10±1 | 1 |
Resistance Tolerance: ±2%(G) ±5%(J) ±10%(K)
■ Coating Wire Wound Power Resistors Characteristics
| Item | Tested | Requirement |
| Resistance series tolerance | E24 ±5% ±10% | |
| Solder ability | 265±5℃,2s+0.5s, 1.5~2.0mm | △R≤±(1%R+0.05Ω), by 95%at least No damage |
| Terminal strength | 10N 30±1.5s | △R≤±(1%R+0.05Ω, No damage |
| Short time overload | 10x Rated power 5s | R≤±(1%R+0.05Ω |
| Resistance soldering heat | 350℃±10℃, 3~3.5mm | △R≤±(1%R+0.05Ω, No damage |
| Vibration | 10~500Hz, 0.75mm or 98m/s2 X、y、Z All 6h | △R≤±(1%R+0.05Ω), No damage |
| Load life | 1.5h on 0.5h off 1000h | △R≤±(5%R+0.1Q) |
| Moisture Resistance | 40℃ RH 90~95% 96h | △R≤±(5%R+0.1Ω) |
■ Derating Curve
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Tel: 0086-519-83976620
WhatsApp: +86-13806118535
Email: liujindong@nfdq.cn
No. 6, Xinxin Intelligent Industrial Park，Changzhou, Jiangsu
Changzhou Southern Electronic Element Factory Co., Ltd. is located in the city of Changzhou, which has a long history in Jiangsu Province. It is situated in the most active economic area in Yangtze River Delta Centre. The transport is very convenient. Expressway, Fast railways run though it. And it only takes one and half hours to reach Shanghai or Nanjing city. Airplane from here is through to major cities in China.
Changzhou Southern Electronic Element Factory Co., Ltd. was founded in 1989. After several years' development and effort, it has invested and opened up three subsidiary companies, in Yancheng city, Huai'an city in Jiangsu Province, and Lang'xi City in Anhui Province respectively.
