Difference between fast blow fuse and slow blow fuse.

A fast or quick blow fuse is a type of fuse that bursts instantly when a high power voltage is passed through it.

This is the most common fuse that can be found in everyday household electronic appliances as they are sensitive to changes in the flow of electrical current. Therefore, to save these appliances from getting ruined, they need a prompt reaction to counter this problem, which is done by a fast-blow fuse, because the fast-blow fuse allows the home appliance to survive by instantly shorting itself instead of the electronic circuit.

A slow-blow fuse is a type of fuse that can handle a temporary surge of current and exceeds the current rating of the fuse.
In other words, it is defined as a fuse that can tolerate high levels of voltage for a short period without shorting itself. It implies that when a short or a sudden change in voltage occurs, a slow-blow fuse doesn’t burn immediately rather it withstands the high current for a short time so that we would have enough time to turn off the power source.

It is normally used in the motor industry because when the engine gets started, at that moment, a high current of electricity is passed through the electronic circuit. Hence, the fuses could be blown, but by using a slow-blow fuse, we can handle this problem as this fuse can withstand that sudden high current flowing from the circuit, enabling the motor to start.


Simply Easy Learning

Updated on: 10-Oct-2022

1K+ Views

Kickstart Your Career

Get certified by completing the course

Get Started