Spa Components - Spa and Hot Tub Circuit Board Fuse, 30A, Class G
Spa circuit board fuse 1-FU-30A is a 30 amp fuse used on many spa circuit boards. Measures 13/32"" wide by 1-5/8"" in length, the Time-Delay Class G fuse is made by Littelfuse.
Opaque circuit board fuse, so you cant visually check its condition, but you can use an electrical meter set on Ohms, to measure continuity of a spa fuse. Place probes on both ends (dry), and if the spa fuse is good, you should see a rising reading on your meter. Bad fuses or blown fuses will read OL, or overload, indicating that power can not pass thru the fuse.