Mersen 25A 690Vac 10mm x 38mm gR High Speed Fuse

25A High Speed AC Fuse. Also known as a Semiconductor Fuse.

Current:  25A Continuous (derated to 21A when fitted in a fuse holder)
Voltage:  690V AC
Size:  10mm x 38mm

Operating Class: gR

Fuse Power Loss: 4.3W (at 25A). Maximum continuous rated current when fitted in a fuse holder is 21A (derated to ensure fuse power loss does not exceed fuse holder discipation limit of 3W). See fuse holder linked below
Suitable for apparatus requiring a 25A gR fuse where the continuous operating current is 21A or below

Manufacturer is Mersen, previously sold under the Ferraz Shawmut brand.

Manufacturers Part Number:  FR10GR69V25 or F1014581