Blue Sea Terminal Fuse Block 30 to 300A The Blue Sea MRBF Terminal Fuse Block is compact and high-amp, appropriate for DC main, inverter, windlass and bow thruster circuit protection. This fuse block is provides high current protection in tight space constraints. Features Isolated stud design uses standard M8 hardware and permits stacking of terminals Insulating cap prevents accidental shorts Accepts 516 ring terminals Mounts on 38 terminal studs Specifications Maximum Amperage 300A Maximum Volt