How Long Did It Take To Find That Elusive Snap-On Fuse (EEDM504B2)? Well, this fuse will suit you. The original fuse is 31.20mm long, this is 31.93mm long. The diameter of both has a difference of 0.05 mm. This could be a bit of a rough build due to the length. But he will pass and work like a champ! Please see the picture for the length difference.