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Device circuit breakers, also known as miniature circuit breakers (MCBs) or supplementary protectors, are compact overcurrent protection devices designed for branch circuits and sensitive equipment. These devices typically feature a thermal-magnetic trip mechanism, with rated currents from 0.5A to 63A, breaking capacities up to 10kA, and voltage...
Device circuit breakers, also known as miniature circuit breakers (MCBs) or supplementary protectors, are compact overcurrent protection devices designed for branch circuits and sensitive equipment. These devices typically feature a thermal-magnetic trip mechanism, with rated currents from 0.5A to 63A, breaking capacities up to 10kA, and voltage ratings of 240/415V AC or 48-80V DC. They are available in 1P, 1P+N, 2P, 3P, and 4P configurations, with trip characteristics B, C, D, and K for different load types. Unlike standard MCBs, device circuit breakers are specifically optimized for protecting control circuits, instrumentation, and electronic loads in industrial environments.
These circuit breakers are primarily installed in control panels, distribution boards, and automation cabinets within industrial facilities, commercial buildings, and infrastructure projects. Common applications include protection of PLC power supplies, motor control centers (MCCs), HVAC systems, lighting circuits, and process instrumentation loops. They are also widely used in renewable energy systems, such as photovoltaic arrays and wind turbine control units, where DC-rated versions are essential. In the telecommunications sector, they safeguard rectifiers and battery backup systems.
Key subcategories include thermal-magnetic MCBs, hydraulic-magnetic breakers, and electronic trip units. Popular article codes follow patterns like S201-B16 (ABB System pro M compact), 5SY4116-7 (Siemens Sentron), or FAZ-B16/1 (Eaton Moeller). These codes typically encode the series, number of poles, trip characteristic, and rated current. For example, in the ABB S200 series, S201-B16 indicates a 1P, 16A, B-curve breaker. Other common series include Schneider Electric Acti9 iC60N, Legrand DX³, and Hager MCN.
Our platform offers real-time pricing and express worldwide shipping for all device circuit breaker series. Each product listing includes detailed technical datasheets, wiring diagrams, and certification documents (IEC/EN 60898, UL 1077). Our team of electrical engineers provides personalized support for selecting the correct trip curve and breaking capacity for your specific application, ensuring compliance with local regulations and optimal system protection.
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