Blue Sea 5502100 Class T Fuse Block w/Insulating Cover - 225 to 400A [5502100]Class T Fuse Block with Insulating Cover 225 to 400A Allows the use of Class T fuses for fast acting circuit protection of inverters and other electronics Four stud design provides ample access around connecting stud to install large cable lugs without obstruction from the fuse Insulating cover satisfies ABYC USCG insulation requirements Cover breakouts allow wire access in any direction Stud design ensures secure fuse mounting even with high heat