Schaffner part numbering begins with the series number followed by mounting style code, version code, current rating, termination code, and panel thickness range code (for snap-fit only where applicable). Some part number examples include: FN9260B-4-06; a 4A model with double fuse holder. It is “B” (Medical) grade, in a screw mount body with Faston terminals and FN 261-10-06; a 10A model with a single fuse holder. This unit is standard grade, in a screw mount body with Faston terminals. The FN9260SB-2-06-20 is a 2A model with a double fuse holder. It is a “B” (Medical) grade inlet in a snap fit housing for a panel thickness of 1.6 - 2.5mm, with Faston terminals.