A Miniature Circuit Breaker (MCB) is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current, typically resulting from an overload or short circuit.
"C" refers to the tripping characteristic curve, suitable for medium inductive loads like commercial lights and small motors. "63" represents the rated current capacity of 63 Amperes.
2P breakers protect two single-phase lines or one phase and neutral; 3P breakers are used for three-phase systems without a neutral line; 4P breakers protect three-phase lines along with a neutral line.
They are suitable for residential, commercial, and industrial electrical distribution networks requiring reliable overcurrent and short-circuit protection.
Selection depends on your power system wiring configuration. Single-phase applications generally use 2P, while three-phase power systems require 3P or 4P depending on neutral line protection requirements.