Can you replace a 400mA 125V fuse with a T10L 250V fuse?

Answer 1

I have a T10L 250V fuse in a control system and don not know what amperage this is. Can someone help ??

You can replace a 400ma fuse with a smaller amp fuse but never with a larger amp fuse. The amperage of the fuse is written on the fuse somewhere. If it has a 125 volt fuse then replace it with a 125 volt fuse.

I got that, thanks!! The problem is that there is no amperage indicated on the fuse, only the T10L, and I was wondering if this is just the type of fuse, or if it was a codification of the amperage, like a 10A delayed or something...

Class T fuses are non-renewable, current-limiting, and conform to UL 198H. Current ratings range from 0A to 1200A for 300V rated fuses, and 0A to 1,200A for 600VAC rated fuses (DC ratings are also available). The interrupting rating is 200kA rms symmetrical and these fuses are designed for protection of feeders and branch circuits in accordance with the NEC. Class T fuses must be labeled "Current Limiting", and may be labeled "Time Delay" if they pass time-delay requirements. I can find no listing for a T10L fuse in this class, so I cannot find the amp rating on this fuse. My guess is that it is a 10 amp fuse, which is far greater than a 400 ma fuse. So my answer is no, you cannot use this fuse.