Fuse question

[racefan]

My converter says to use Littlefuse type 257 fuses. I’ve searched and cannot find an answer. What is a “type 257” fuse? I believe Littlefuse is just the brand?

[ducksface]

Where have you looked?
https://www.google.com/search?q=257+...obile&ie=UTF-8

[Beau388]

Originally Posted by racefan

My converter says to use Littlefuse type 257 fuses. I’ve searched and cannot find an answer. What is a “type 257” fuse? I believe Littlefuse is just the brand?

In blade fuse selections there are MAX, standard, mini and micro. Most RVs use the standard blade fuse in the ATO/ ATC 257 design which replaced the round glass fuse in the early 1970s in American cars. Fuses under the hood in the power distribution box will usually be a mixture of MAX and standards. Fuses in the power center of the RV will usually be standard type ATC 257.

In the new cars, blade fuses will be micros in the interior fuse block. My 2009 Jetta has MAX under the hood and minis in the interior fuse block. It is a CAN bus car. All my Fiats (1957 1962, 1967 and 1971 used a different ceramic fine wire fuse.
I carry several spares for all my interior fuses. All my interior fuses have telltale indicator lights. I just wish the ones under the hood did.

[ducksface]

My new batch of 257 max and mini fuses have test holes on the top of them so you can probe/test without removing them.
Amazon sells circuit breakers in 257 size.