SMD fusible wire wound resistors are specialized components designed to protect circuits from overcurrent conditions. These resistors combine the characteristics of a standard wire wound resistor with a fusible element that melts under excessive heat, effectively disconnecting the circuit and preventing damage. Their surface mount design allows for easy integration into compact electronic devices, making them ideal for space-constrained applications. Offering precise resistance values and low noise, SMD fusible wire wound resistors are commonly used in power supplies, automotive electronics, and consumer devices, ensuring enhanced safety and reliability in various applications.
SMD fusible wirewound resistors provide a unique dual-function solution that combines precise resistance with reliable overcurrent protection. Here are their primary advantages for modern electronic designs:
1. Space and Cost Efficiency
Component Integration: Replaces the traditional "resistor + fuse" combination with a single component, saving valuable PCB space
Reduced BOM Count: Lowers component procurement and inventory management costs
Simplified Assembly: Fewer placement operations during SMT manufacturing
2. Reliable Circuit Protection
Dual Safety Function: Acts as both a current-limiting resistor and a protective fuse
Predictable Fusing: Engineered to open reliably at specified overload conditions (typically 5-10x rated power)
Fast Response Time: Opens within 1-5 seconds under fault conditions, protecting sensitive downstream components
3. Robust Performance Characteristics
High Power Handling: Available in 1W, 2W, and 3W ratings within compact SMD packages
Excellent Surge Withstand: Handles short-term overloads without nuisance tripping
Wide Operating Temperature Range: -55°C to +155°C suitability for various environments
4. Enhanced Safety Features
Flame-Retardant Construction: Ceramic package compliant with UL 94V-0 standards
Consistent Performance: Wirewound construction ensures stable resistance until fusing point
Certified Reliability: UL/cUL recognized with AEC-Q200 options for automotive applications
5. Design Flexibility
Broad Resistance Range: From 0.1Ω to 1kΩ to match various circuit requirements
Multiple Tolerance Options: ±5% and ±2% standard tolerances available
Automation Compatible: Standard tape-and-reel packaging for high-volume production
| Type | Dimensions ( mm ) | ||||
| D | L | D1 | POWER | Resistance range | |
| 0207 | 2.2±0.5 | 5.9±0.5 | 2.1±0.3 | 0.5W | 0.1~100Ω |
| 0309 | 3.5±0.5 | 9±0.5 | 3.2±0.3 | 1W | 0.1~160Ω |
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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.
