Schmelzsicherungen, or fuse links, are safety devices used in electrical circuits to prevent overloads and short circuits. They consist of a metal wire that melts when the current exceeds a certain level, breaking the circuit and stopping the flow of electricity. This helps protect electrical appliances and wiring from damage. These fuses come in various types and ratings, designed for different applications. When a Schmelzsicherung blows, it must be replaced to restore the circuit. Regular checks and replacements are essential for maintaining electrical safety in homes and industries.