MCB stands for Miniature Circuit Breaker, a safety device used in electrical systems. It automatically switches off electrical circuits when it detects an overload or short circuit, preventing potential damage or fire hazards. MCBs are commonly found in residential and commercial buildings, providing essential protection for electrical appliances and wiring. These devices come in various ratings and types, designed to handle different electrical loads and conditions. MCBs are often preferred over traditional fuses because they can be reset after tripping, making them more convenient for users. They are an important component of modern electrical safety systems, ensuring reliable operation of electrical networks.