When a fuse is energized, the heat converted from electrical energy causes the temperature of the melt to rise. When normal working current or allowable overload current passes through, the heat generated is radiated to the surrounding environment through the melt or shell, and the heat dissipated through convection, conduction, and other means gradually reaches a balance with the heat generated. If the generated heat is greater than the dissipated heat, the excess heat gradually accumulates on the melt, causing the temperature of the melt to rise; When the temperature reaches or exceeds the melting point of the melt, it will cause the melt to melt, fuse, and cut off the current, playing a role in safety protection of the circuit.
1. Divided into: φ 2 φ 3 φ 4 φ 5 φ 6 and others.
2. According to the fuse characteristics, it is divided into fast fuse type, medium delay fuse type, and delay fuse type. (It can also be divided into express and strong delay).
3. According to the breaking capacity, it can be divided into low breaking type, high breaking type (and can also be divided into enhanced breaking type).
4. According to safety standards (or usage regions), it can be divided into UL/CSA (North America) specifications, IEC (China, Europe, etc.) specifications, MIT/KTL (Japan/Korea) specifications, etc.
5. Other classifications.
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