As a professional low-voltage electrical manufacturer with 20 years of industry experience, YUANKY presents the DC S7 Series Solar DC Miniature Circuit Breaker (MCB), a high-performance solution tailored for DC circuit protection and isolation, optimized for photovoltaic (PV) solar installations. Available in 1P to 4P configurations, it supports rated voltages from DC250V to 1000V, rated current from 6A to 50A, and C-type tripping characteristics (7In-15In). It delivers a 6kA rated breaking capacity and 15kA limited short-circuit breaking capacity at 250VDC, with an ultra-fast response time ≤4ms. Its innovative non-polarized design is a core highlight, eliminating polarity distinction during wiring, drastically saving installation time and avoiding wiring errors.

This DC MCB operates on a dual-protection mechanism to address common DC system faults. For overload protection, a built-in bimetallic strip bends with heat to trigger the tripping mechanism, cutting off the circuit smoothly under sustained overload to prevent equipment thermal damage. For short-circuit faults, a high-sensitivity electromagnetic release actuates instantaneously, interrupting fault current within ≤4ms to avoid hazards from DC arcs. Equipped with a professional DC arc extinguishing system, it solves the challenge of arc extinction in DC circuits with no natural zero-crossing point, ensuring safe and reliable breaking. The DIN rail mounting design enables simple, fast installation in standard distribution cabinets.

Strictly compliant with IEC 60947-1/2 international standards, the product holds CE certification and SEMKO-issued CB test reports, meeting global market access requirements. It operates stably in -5℃ to +60℃, adapting to diverse harsh working conditions. Widely applied in grid-tied/off-grid PV systems, battery energy storage systems, DC distribution panels, telecom base stations, new energy equipment and industrial DC control circuits, it is a cost-effective ideal choice for PV installers, system integrators and electrical contractors worldwide. Backed by strict quality control and full-range pre-sales & after-sales service, YUANKY DC MCB provides trusted, long-lasting protection for DC electrical systems across the globe.