Q: You have SEVERAL fuses listed as ATO/ATC. So which type are they? ATO are OPEN at on the bottom and ATC are CLOSED on the bottom? Both types are the APR fuse dimentions (commonly called standard)?
A: Good question! I went and checked my stocks and found I had both types. Apparently Blue Sea have sourced these fuses from more than one manufacturer and so they can be either type which is why they describe them as ATO/ATC