miniature circuit breaker (MCB)

A Miniature Circuit Breaker (MCB) is a compact, automatic electrical protection device designed to safeguard circuits from overloads and short circuits in residential, commercial, and industrial applications. Unlike traditional fuses, MCBs provide quick and reliable disconnection of the circuit when abnormal conditions occur, and can be easily reset after tripping — ensuring convenient and continuous protection.

Built with precision-engineered mechanisms and durable insulation materials, MCBs deliver long-term reliability and consistent performance. They are available in single-pole, double-pole, triple-pole, and four-pole configurations, with rated currents typically ranging from 1A to 125A.

MCBs operate on thermal and magnetic tripping principles, protecting both against overload (slow heating) and short-circuit faults (instant magnetic response). These breakers comply with IEC/EN 60898-1 standards, ensuring global safety and compatibility in modern electrical installations.

Key Features:

• Provides overload and short-circuit protection

• Fast tripping mechanism ensures safety and equipment protection

• Resettable design—no fuse replacement needed

• Available in 1P, 2P, 3P, and 4P versions

• Compact, modular construction for DIN rail mounting

• Rated current: 1A to 125A

• Breaking capacity: up to 10kA

• Meets IEC/EN 60898-1 standards