Cartridge Fuse is a safety device designed to protect electrical circuits from overcurrent. 

Function: It prevents damage to appliances and wiring by melting and breaking the circuit when the current exceeds a safe level. 
Specifications: The fuse is rated for 250V and 15A, with dimensions of 6x25 mm.
Usage: Commonly used in household plugs and small industries to protect equipment from overloads and short circuits. 
Replacement: Fuses are sacrificial devices and must be replaced once they have blown. 
Types: Cartridge fuses come in various types, including D-type and link-type, with link-type having knife blade and bolted options.