Why choose slow blow fuses for power modules?


The word spare can also be used as the second choice in emergencies. We usually have first-hand and second-hand preparations. Spare is second-hand preparation. Commonly we say spare players, spare tires, etc. belong to the second hand chooses. Today, let's talk about power modules that can also be used as second-hand options. Why do power modules choose slow-blow fuses? Let me tell you.

1. Short circuit and overload protection

Generally, there are only two types of fuses, one is a fast blowing fuse, and the other is a slow blowing fuse. The difference between them is that when the current of the power module exceeds the rated value, the fast blowing fuse will blow without hesitation to provide short-circuit protection. The role of slow fuse, while the non-fault pulse current in the circuit, including current overload, will remain intact from time to time, which not only plays the role of short-circuit protection, but also plays the role of overload protection.

2. Ability to withstand instantaneous pulse current

Fast-blow fuses can withstand less instantaneous pulse current than slow-blow fuses, and the required fuses are smaller, and the corresponding fast-blow pulse resistance is also much weaker. Because the power module works under high voltage for a long time machine, so now it will be more suitable for the ability to withstand instantaneous pulse current.

3. Anti-interference ability

Generally speaking, slow-blow fuses are higher than fast-blow fuses, and power modules sometimes work for a long time under various unstable environmental conditions, so it is more appropriate to choose slow-blow fuses.