What Is Fast Acting Fuse

There are various types of fuses.

What is fast acting fuse.

This is is a generalisation which no doubt does not always hold but it works in most case. Miniature ul csa fuses and fuse holders. Current curve will show the fast acting feature of the fuse. 1 8a through 15a 250vac ul listed and csa certified.

Examples if a circuit has a current rating of 15 amperes and a voltage rating of 120 volts then the current rating should not exceed 15 amperes and the voltage rating should be at least 120 volts. A fast acting fuse is an electrical safety device that protects electrical circuits and sensitive devices. In a fast acting fuse the thermal dissipation in the wire acts to melt the wire portion that is carrying it. The main function of a fuse is to melt the wire inside during overloads and disconnect the electricity flow into that circuit.

All types of fuses will blow out but the differences lie in how and what leads to that blowing. Fast acting fuse makes this thing happen instantly. The unique feature that differentiates it from other types is that it has a quick response time. It is ok to replace fuses with higher voltage ratings than the.

If you are a beginner or you don t have any experience whatsoever in electrical work then you have to learn to distinguish among different types of fuses. A time delay fuse has the capacity to sustain transient pulse currents which is not the strong suit of a fast acting. A slow blow fuse a fast blow fuse and a two blade mini fuse in today s market we find a fuse for every electronic need. In this situation fast acting is required to protect the source circuit from the load.

How to select a fast acting fuse. Take a look at the time delay fuse vs fast acting fuse analysis to know how they actually differ in functions. Key features benefits up to 250v fast acting ceramic 1 4 x 1 1 4. Choose from our selection of fast acting glass tube fuses fast acting ceramic tube fuses ul class cc fast acting midget fuses and more.

Their single element silver link design enables them to provide fast acting overload and short circuit protection. In stock and ready to ship. When used to protect inductive loads such as motors solenoids and transformers klnr klsr series fuses must be greatly oversized. 20a through 30a 250 125vac ul recognized.

Take a look at the time delay fuse vs fast acting fuse analysis to know how they actually differ in functions. There is some effect from adjacent heat but much reduced from a slow blow. Fast acting fuses have straight single wires. The below image is a fast acting fuse from littelfuse with the following part number of 021706 3hxp.

It disconnects the circuit path from the power source almost immediately when electrical surges mismatched loads short circuits or device.