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The 312 designation means that it is a 312 series fuse made by a company called Littelfuse. This is a series of fast acting, glass cartridge fuse. Knowing the series allows you to look up the exact specifications for the fuse at the company's website.

The fuse would have a rating impressed into one if the steel caps that looks like:

250V 312 5A

Indicating it is a 250 Volt, 5A fuse, and is a Littelfuse 312 series, which implies fast acting, specific performance specifications and its size (31.75+/- 1.12mm x 6.25 +/- 0.3mm).

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Ian Gough

Lvl 2
2y ago

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