Fast Blow Fuse Time

In general the time required for a fuse to blow can be given i2t where i is the current and t is the time.

Fast blow fuse time.

The uses for a slow blow fuse and a fast blow fuse. 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. Hence the fuses could be blown. Many slow blow images here all glass ones that i looked at have spiraled wire.

Here the coiled structure is clear. For example if you send 40 amp current through a 30 amp fast blow fuse it will blow almost immediately. Many people think that time delay fuses are less effective because they allow current overloads pass through the circuits. The slow blow fuse has thermal inertia whereas a fast blow has a very short thermal time constant.

But a slow blow one will melt its fuse wire after a specific period within 10 or 15 seconds. In stock and ready to ship. Slow blow fuse requires much higher time than the fast acting one. Typical slow blow fuse.

It would seem obvious that a fast blow fuse would be appropriate for a load without a startup surge and a slow blow or time delay fuse for the one with the surge. Sometimes it is visually less apparent. Choose from our selection of slow blow fuses including time delay glass tube fuses time delay ceramic tube fuses and more. A slow blow fuse is normally used in the motor industry because when you start an engine at that moment a high current of electricity is passed through the electronic circuit.

These types of fuse are used on equipment such as motors which can draw larger than. The question is how to match the fuse to the load. The accumulated heat from adjacent sections helps blow the fuse. Fast acting fuses should be used in motor circuits will blow more frequently.

In this article we will discuss fast blow fuse vs time delay fuse. A time delay fuse also known as an anti surge or slow blow fuse is designed to allow a current which is above the rated value of the fuse to flow for a short period of time without the fuse blowing.