Fuse size (amps) for SR-497HPC? The SR-955HPC, SR-655HPC & SR-447HPC2 use a 15 amp fuse. The SR-497HPC is a 20 amp fuse located on the back of the radio. A 10 amp fuse is used with the SR-94HPC. Have more questions? Submit a request 0 Comments Article is closed for comments.