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The Live DCM425C 4 Pole DC MCB is a high-capacity specialized multi-pole direct current miniature circuit breaker engineered to provide comprehensive protection for complex DC electrical circuits requiring simultaneous switching of multiple conductors at substantial power levels. Rated at 25 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards DC circuits in applications such as large-scale industrial bipolar solar photovoltaic systems, major DC distribution networks, and critical infrastructure telecommunications. 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 high-power DC sources. With its robust construction and precision thermo-magnetic release, the DCM425C ensures complete circuit isolation and equipment protection for complex industrial-scale renewable energy and large-scale DC applications requiring multi-pole switching at higher current ratings.
Multi-Pole DC Protection: 4-pole configuration for complex DC systems requiring simultaneous switching of multiple conductors.
Specialized DC Protection: Engineered specifically for direct current applications, ensuring reliable arc extinction and protection in DC circuits.
4-Pole Switching: Simultaneously protects and switches multiple conductors, ensuring complete circuit isolation in bipolar or multi-conductor DC systems.
6kA DC Breaking Capacity: Reliable fault current interruption for demanding DC installations including large-scale industrial bipolar solar PV and major DC 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 large-scale industrial bipolar solar PV strings, major DC distribution networks, critical telecom infrastructure, and complex high-power DC applications.
Large-Scale System Focus: Perfect for industrial-scale bipolar solar arrays, positive/negative/earth switching, major DC power distribution, and telecommunications hub networks.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on all four 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 | DCM425C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (4P) |
| Current Rating (In) | 25 Amperes |
| Trip Curve Type | C Curve (5-10 × In) |
| Rated Voltage | DC (consult rating chart for bipolar configurations) |
| 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 (all 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 large-scale industrial applications for the DCM425C 4-pole 25A DC MCB?
Large-scale industrial bipolar solar PV farms, major DC power distribution centers, telecommunications infrastructure hubs, data center main DC distribution, and heavy industrial DC control systems.
2. How does 25A 4-pole protection benefit large-scale bipolar solar installations?
Ideal for protecting major industrial bipolar solar arrays, typically supporting systems up to approximately 600-700W per circuit, ensuring complete simultaneous disconnection of all poles for maximum safety.
3. What is the advantage of 25A rating over 20A for 4-pole industrial DC applications?
Provides 25% additional capacity for large-scale systems, essential for major solar farms, expanded telecom infrastructure, or applications where 20A circuits would be insufficient.
4. Why is 4-pole switching essential for critical infrastructure DC systems?
Critical infrastructure (hospitals, data centers, telecom hubs) requires absolute isolation during maintenance. 4-pole switching ensures all conductors including earth are disconnected, preventing hazardous potential differences.
5. What cable size is recommended for 25A 4-pole DC large-scale circuits?
4mm² copper conductor minimum per pole. 6mm² strongly recommended for longer runs to minimize voltage drop. All four conductors must be identical size and type for balanced protection.
