A low voltage circuit breaker (up to 1 kV) safeguards electrical circuits from overloads, short circuits, and faults by automatically interrupting current flow. Widely used in residential, commercial, and industrial systems, it combines thermal-magnetic or electronic trip units for precise protection settings. Key components include arc chutes, contacts, and modular designs for easy installation. Available as MCBs (miniature), MCCBs (molded case), or ACBs (air circuit breakers), it supports manual or motorized operation and integrates with smart systems for remote monitoring. Compact, durable, and compliant with IEC 60947 standards, modern versions prioritize energy efficiency, fire safety, and compatibility with renewable energy setups. Essential for electrical safety, it ensures equipment protection and minimizes downtime in power distribution networks.