fuse Characteristic

It depends. For precise coordination work you always get the time-current curves from the manufacturer, but fuses built to industry standards have to meet certain minimums. For example medium voltage E-rated fuses have to carry a certain amount of overcurrent for a specified minimum time. On the other hand that little 1 A fuse soldered to the PCB of a hard drive may have any characteristic the manufacturer desired.

Bill

( Suggest browsing the Littlefuse and Buss Web sites, you'll find a large amount of data on fuse time-current characteristics)

You also have to be careful as some UL marked have restriction on their use when you check the UL web site.

BillB

Standard to a point.

All fast acting fuses are fast acting,etc. Trying to compare a fast acting fuse to a time delay is a mute point.

Trying to compare a fast acting fuse between manufactures is doable. But not always easy.

Each company will have a slightly different curve for each product. I seldom get into situations where the very subtle nuances are needed.

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Every factory has to made fuses which characteristic corresponding to standards IEC +/- few percent.

Tom