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The Live DCM225C Double Pole DC MCB is a high-capacity specialized direct current miniature circuit breaker engineered to provide reliable protection for higher-power DC electrical circuits in commercial solar photovoltaic systems, large battery storage applications, and industrial DC power distribution networks. Rated at 25 Amps with a C-curve tripping characteristic, this 2-pole breaker safeguards both positive and negative conductors on DC systems up to appropriate voltage ratings. It features a 6kA breaking capacity suitable for demanding DC installations. The C-curve characteristic (5-10x In) provides excellent protection for DC circuits while accommodating the characteristics of DC power sources. With its robust construction and precision thermo-magnetic release, the DCM225C ensures equipment protection and operational safety for commercial renewable energy and industrial DC applications requiring higher current capacity.
Specialized DC Protection: Engineered specifically for direct current applications, ensuring reliable arc extinction and protection in DC circuits.
Double Pole Switching: Simultaneously protects and switches both positive and negative conductors, ensuring complete circuit isolation during fault conditions.
6kA DC Breaking Capacity: Reliable fault current interruption for demanding DC installations including commercial solar PV and large battery systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (125A to 250A), specifically calibrated for DC circuits with moderate inrush characteristics.
High-Capacity 25A DC Protection: Ideal for commercial solar PV strings, large battery banks, DC lighting circuits, and industrial DC power distribution.
Commercial Renewable Focus: Perfect for commercial solar arrays, large-scale battery storage systems, DC distribution boards, and industrial DC power supplies.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on both poles.
Superior Arc Extinction: Specialized DC arc quenching technology ensures safe interruption of direct current without sustained arcing.
Extended Operational Life: 8,000 electrical operations for long-term reliability.
Professional Installation: Standard 35mm DIN-rail mounting with IP20 finger-safe terminals.
| Specification | Details |
|---|---|
| Brand | Live |
| Series | DCM |
| Model Number | DCM225C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 2 Pole (2P) - Switches Positive + Negative |
| Current Rating (In) | 25 Amperes |
| Trip Curve Type | C Curve (5-10 × In) |
| Rated Voltage | DC (consult rating chart) |
| Rated Breaking Capacity | 6kA (6000 Amps) DC |
| Insulation Rating (Ui) | 500 Volts |
| Impulse Withstand (Uimp) | 4000 Volts (1.2/50 µs) |
| Dielectric Test Voltage | 2kV for 60 seconds |
| Protection Mechanism | Thermo-magnetic (both poles) |
| Operating Temperature | -5°C to +40°C (daily average ≤35°C) |
| Calibration Reference | 30°C |
| Storage Temperature | -25°C to +70°C |
| Electrical Lifespan | 8,000 cycles |
| Protection Class | IP20 |
| Terminal Capacity | Up to 16 mm² |
| Mounting Type | DIN Rail (35mm) |
| Standards | BS IEC/EN 60898 (DC applications) |
1. What are the primary commercial applications for the DCM225C 25A DC MCB?
Commercial solar PV string protection, large-scale battery energy storage systems, industrial DC power distribution, telecommunications infrastructure, and high-power DC lighting installations.
2. How does 25A DC protection benefit commercial solar installations?
Ideal for protecting larger solar strings of 12-16 panels (depending on wattage), typically supporting systems up to approximately 600-800W per string at standard DC voltages, suitable for commercial rooftop arrays.
3. What is the advantage of 25A rating over 20A for DC systems?
Provides 25% additional capacity for demanding commercial applications, essential for larger solar arrays, high-capacity battery banks, or systems where 20A circuits would operate near their limits.
4. Why is 6kA DC breaking capacity critical for commercial installations?
Commercial solar arrays can generate significantly higher fault currents under full sun conditions. 6kA rating ensures the breaker can safely interrupt maximum fault current in larger installations.
5. What cable size is recommended for 25A DC commercial circuits?
4mm² copper conductor minimum. 6mm² strongly recommended for longer runs to minimize voltage drop and power loss. Both positive and negative conductors must be identical size and type.
