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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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I'll just come out and say it.....
Fuses wear out.....even if not stressed above rating.
A fuse run far below rating SHOULD last decades, unless inrush current at startup is an issue.
A fuse run at say......80% of rating might not last for 'decades'......
WHY? At least in a DC circuit, which would be perhaps power supply output? Electric current tends to 'drag' the conductor in the direction of electron flow.....This can result in a thinning of the conductor at point of maximum current DENSITY... And may result in eventual failure.
Is this a cause for alarm or worry? NOT AT ALL....But I would tend to treat even modestly priced after market fuses of maybe 50$ each or Less, as Consumables.....Depending on the circuit I'd be reluctant to spend really Big Bucks on a fuse.
What I note here is a known failure mode in semiconductors where it's known as electro migration.
I suspect the same goes for an AC circuit, which would be the line side of a conventional PS....just as an example....
Too much is never enough
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Topic - Note about fuses: - pictureguy 17:02:51 04/16/22 (7)
- Pulse Factor Derating Illustration - Jonesy 12:52:56 04/17/22 (6)
- RE: Pulse Factor Derating Illustration - pictureguy 13:11:57 04/17/22 (5)
- RE: Pulse Factor Derating Illustration - Jonesy 13:56:35 04/18/22 (4)
- RE: Pulse Factor Derating Illustration - pictureguy 14:08:03 04/18/22 (3)
- RE: Pulse Factor Derating Illustration - Jonesy 08:59:08 04/19/22 (2)
- RE: Pulse Factor Derating Illustration - pictureguy 12:56:02 04/19/22 (1)
- RE: Pulse Factor Derating Illustration - Jonesy 13:45:08 04/19/22 (0)
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