Molded Case Circuit Breaker (MCCB) SUPPLIER IN NOIDA & DELHI NCR A Molded Case Circuit Breaker (MCCB) is a type of electrical protection device used to protect electrical circuits from overload, short circuits, and sometimes ground faults. It is widely used in industrial, commercial, and residential applications where high current ratings are required. ________________________________________ Key Features of MCCB: • Current Rating: Typically, from 15 A to 2500 A • Interrupting Capacity: Can interrupt high fault currents (up to 100 kA) • Thermal and Magnetic Protection: o Thermal (for overload) o Magnetic (for short circuits) • Molded Case: The casing is made of insulating material to protect internal components • Trip Mechanism: Automatically disconnects power when faults occur • Adjustable Settings (in some models): Allow fine-tuning of trip thresholds ________________________________________ Components: 1. Operating Mechanism – Manual switch to open/close the circuit 2. Contacts – Carry current; open during faults 3. Arc Chute – Extinguishes the arc when the circuit breaks 4. Trip Unit – Senses current levels and triggers the breaker ________________________________________ Applications: • Power distribution systems • Protection of motors, generators, and transformers • Subpanels and industrial control systems ________________________________________ MCCB vs. MCB: Feature MCCB MCB Current Rating Up to 2500 A Up to 125 A Adjustable Trip Yes (in some models) No Size Larger Smaller Application Industrial/Commercial Residential/Light Commercial