A fuse block or fuse base is a type of fuse holder that is designed to be fixed to a panel by way of screws or bolts. Some fuse blocks can be joined together to create multiple poles to provide fuse protected electrical power to subsidiary circuits in an electrical supply system.
The function of a fuse holder is to integrate fuses safely in electrical circuits, ensure a robust current path (voltage does not creep to other components) and provide a method to replace fuses once they manage overcurrent events as intended.