A Miniature Circuit Breaker (MCB) is an automatic electrical safety device used to protect electrical circuits from overload and short-circuit current. When current exceeds safe levels, the MCB trips and cuts off the electricity, protecting wiring and connected devices. Unlike a fuse, an MCB can be reset after tripping Key Features of Schneider MCBs • Automatic protection against overload & short circuit. • Different current ratings (e.g., 2A to 63A or higher). • Tripping curves (B/C/D): o Type B – trips at 3–5× rated current (good for resistive loads). o Type C – trips at 5–10× rated current (common in general circuits). o Type D – trips 10–20× rated current (for high inductive loads). • Multiple poles: SP (Single Pole), DP (Double Pole), 3P (Three Pole), 4P (Four Pole). • Standards compliance: IEC/EN 60898-1 and IEC/EN 60947-2. DIN rail mountable modular design common in distribution boards. Highlights: • Schneider Electric Acti9 xC60 10A C Curve Double Pole MCB – Good for protecting small circuits (e.g., lighting, outlets). • Schneider Electric Acti9 xC60 6A C Curve Double Pole MCB – Lower current protection for sensitive or small loads. • Schneider 32A SP C Curve MCB – Single pole breaker for higher current circuits. • Schneider Electric Acti9 xC60 32A C Curve Three Pole MCB – For 3-phase circuits (motors, large loads). • Schneider Electric 63A DP C Curve ACTI9 10kA MCB – Robust breaker for heavier loads. • Schneider Electric Acti 9 63 Amp 4 Pole C Curve MCB – Four-pole option for three-phase with neutral systems.