fast / slow blow fuses

millwood · 5th January 2004, 04:40 PM

I am curious as to how fast or slow those fuses blow. I remember that it depends on their melting integral and fast blow fuses can go in milliseconds.

but I haven't seen a datasheet for fuses so I am just curious about this in general.

Any suggestions?

Easyamp · 5th January 2004, 05:05 PM

You could setup a test, and blow a few under a controlled enviorment. Shouldn't be to expensive, I would be very interested to see the results.

Although how would you measure with a low degree of error the start to blow time which under some instances could be only a few ms's.

Maybe all on one board, fuse holder 555 timer and and a fast counter trigered by current on the fuse?

A little out of my relm but interesting.

peranders · 5th January 2004, 05:22 PM

There are datasheets even for fuses. Just surf to any manufacturer, LittleFuse maybe?

sam9 · 5th January 2004, 05:49 PM

You can probably reach the datasheets quickest by lokking up a fuse you like on digikey.com. They have links to the data sheet.

BTW, the relationship between the stated rating of a fuse and under what conditions it will blow is more than a little interesting. Anyone building power supplies and amps should really take a look at these data sheets - you may be just a little surprised.

5th January 2004, 04:40 PM	#1
millwood Account Disabled Join Date: Apr 2003 Location: US	fast / slow blow fuses I am curious as to how fast or slow those fuses blow. I remember that it depends on their melting integral and fast blow fuses can go in milliseconds. but I haven't seen a datasheet for fuses so I am just curious about this in general. Any suggestions?

5th January 2004, 05:22 PM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	There are datasheets even for fuses. Just surf to any manufacturer, LittleFuse maybe? __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

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5th January 2004, 05:05 PM	#2
Easyamp diyAudio Member Join Date: Nov 2003 Location: United states	You could setup a test, and blow a few under a controlled enviorment. Shouldn't be to expensive, I would be very interested to see the results. Although how would you measure with a low degree of error the start to blow time which under some instances could be only a few ms's. Maybe all on one board, fuse holder 555 timer and and a fast counter trigered by current on the fuse? A little out of my relm but interesting.

5th January 2004, 05:49 PM	#4
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	You can probably reach the datasheets quickest by lokking up a fuse you like on digikey.com. They have links to the data sheet. BTW, the relationship between the stated rating of a fuse and under what conditions it will blow is more than a little interesting. Anyone building power supplies and amps should really take a look at these data sheets - you may be just a little surprised.