Closed fuseholders are a fine thing: the fuse is well protected and yet easy to replace.
According to IEC-60127-6, however, the limit was previously 16 A.
Thanks to an extension of this standard initiated by SCHURTER, this is now history.
The new FXP fuse holder for 6.3x32 fuse links is designed for rated currents up to 25 A (IEC) or 45 A (UL).

FXP – High Power Acceptance specification:
> Large power margin compared to current fuse holders
> As a result, safety margin at operating temperatures
> 8W at 23°C and 4W at 50°C
> According to IEC, the touchable parts must not heat up more than 85°C

UHS – Applications
* Industrial
* EV Charging
* Energy
* Data and Communicationtyp_FXP.pd

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