Miniature Circuit Breakers (MCBs) are compact, automatic electrical protection devices designed to safeguard electrical circuits from damage caused by overloads or short circuits. Unlike fuses, which need to be replaced after they blow, MCBs can be easily reset after tripping. They work by detecting abnormal current flows and interrupting the circuit to prevent overheating, fire, or damage to electrical equipment. MCBs are widely used in residential, commercial, and industrial installations to ensure electrical safety and reliability.