Compact focused disconnect device

A power supply disconnect device for installation in a power supply distribution panel having at least one power supply bus, the disconnect device comprising:

• a main housing that fits within the power supply distribution panel;
• a receptacle in the main housing;
• a fuse holder that fits within the main housing receptacle, said fuse holder includes two parts that are moveable relative to each other, and which can be moved into an open position for receiving the fuse and into a closed position for securing the fuse in the fuse holder;
• first electrical contacts within the main housing that are engagable with a fuse in the fuse holder when the fuse holder is inserted in the main housing receptacle;
• and
• an alarm fuse connected to the first electrical contacts so as to provide an alarm in the event that a fuse in the fuse holder is opened, the alarm fuse being located in the receptacle in the main housing.