SC - 20 20A slow blow fuse 35.5mm long x 10mm diameter- used on Balboa controls and Gecko controls and Signature Spas.
All fuses are tested prior to dispatch Fuses carry no warranty due to their consumable nature - these fuses have been tested for continuity and are operable.
Do not replace a blown fuse without first determining the reason for failure as the replacement of the fuse may result in subsequent fuse failure a second time.
Fuses fail through long term stress, low voltage/high current fluctuations, and from equipment failure. Repeated fuse failure may require testing of incoming power supply voltages if spa equipment has tested OK.