Advanced welded spot of anti-surge wire wound resistor
The wire wound resistors have been around for more than a half of century, they are usually existing in high power circuit design, but are not suitable for anti-surge applications. The reason is a reliability problem of solder joint between alloy wire and metal cap, when the wire wound resistors are produced, the joint of the welded spot and metal cap may have false welding on the welded spot. Hence, the welded spot will be easily broken when surge across it with huge energy.
FIRSTOHM realize the reliability of the welded spot is a key factor to withstand surge. Therefore, after the wire wound welding, a layer of alloy is plated on the surface of the welded spot, and the reliability is improved. Below pictures show original welded spot and after implement:
Original - Traditional wire-wound resistor – Welded spot is not reliable against surge
FIRSTOHM - Improved anti-surge welded spot
SWAT/SWMT : Anti-Surge Wire Wound Fast-Fuse (MELF) Resistor
- Worldwide patent pending.
- Enhanced welded spot is reliable against surge.
- Fast-acting fuse device for high power applications.
- Advanced combined anti-surge & fast-fuse structure.
- Flameproof multi-layer coating equivalent to UL 94 V-0.
- Flameproof feature equivalent to overload test UL 1412.
- Thermal fuse to protect against overheating in electronic products.
- Power supply
- Charger for mobile phone
- LED Lighting
- Motor star-up protection
- Motor ignition