What is the amperage rating of a gma T250L 250V fuse?
The GMA series of fuse is a fast acting glass tube fuse. The
dimensions are 5 X 20 mm. This series of fuse's amperage span is
from 63 mA right up to 8 amps. I would suggest that your fuse is
rated at 250 mA or (1/4 of an amp) with a 250 volt rating.