Analysis of Two Reasons for Blowing of Self Recovery Fuses during Operation.fast blow fuse screwfix

　　Self recovery fuses are one of the preferred protective components for many electronic circuits. When a self recovery fuse is in operation, it is inevitable that the circuit will blow. For recoverable fuses that blow in daily use, we must understand the cause in order to solve the problem with the circuit board. Below, we will follow the editor to understand the two situations where self recovery fuses blow during operation:

　　Scenario 1: The self recovery fuse is broken in the middle and intact on both sides, which is caused by excessive load current causing the fuse to blow or be damaged, and the melting point to decrease, but the current is not too high.

　　Scenario 2: When the self recovery fuse melts, there are burn marks and black and white ash near the fastening screws. This is caused by an instantaneous short circuit of the power supply and a high short-circuit current.

　　From the above two situations, it can be concluded that when a self recovery fuse blows during operation, it is necessary to eliminate the fault before installing a new fuse. It is not advisable to blindly install a thicker fuse without identifying the cause. To prevent damage to electrical appliances and unnecessary losses. This is also a key issue that our circuit design engineers need to consider when selecting fuses.

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