That's a 2 amp slow blow fuse rated at 250V. 250mA would be too small a rating. You should get the exact rated and sized fuse that you currently have. Not go bigger or smaller as rated and never go fast blow in place of slow blow or visa versa.
As a side note I just recently replaced my standard fuse with a SR Black and was very impressed for the money spent. The Blue came out about a month after getting it.
As a side note I just recently replaced my standard fuse with a SR Black and was very impressed for the money spent. The Blue came out about a month after getting it.