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The Live DCM263C Double Pole DC MCB is the highest-capacity specialized direct current miniature circuit breaker in the DCM series, engineered to provide reliable protection for maximum-power DC electrical circuits in mega-scale solar photovoltaic systems, massive battery storage applications, and heavy industrial DC power distribution networks. Rated at 63 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 the most demanding DC installations. The C-curve characteristic (5-10x In) provides excellent protection for DC circuits while accommodating the characteristics of the highest-power DC sources. With its robust construction and precision thermo-magnetic release, the DCM263C ensures equipment protection and operational safety for the most demanding renewable energy and heavy industrial DC applications requiring absolute maximum current capacity within the DCM series.
Maximum-Capacity DC Protection: Highest rating in the DCM series for the most demanding DC applications.
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 the most demanding DC installations including mega-scale solar PV and massive battery systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (315A to 630A), specifically calibrated for DC circuits with moderate inrush characteristics.
Maximum-Capacity 63A DC Protection: Ideal for mega-scale solar PV combiner boxes, massive battery banks, large DC motor circuits, and heavy industrial DC power distribution.
Mega-Scale Focus: Perfect for multi-megawatt solar farms, massive battery energy storage systems (BESS), industrial DC distribution boards, and heavy manufacturing 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 | DCM263C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 2 Pole (2P) - Switches Positive + Negative |
| Current Rating (In) | 63 Amperes (Maximum series rating) |
| 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 | 16mm² (35mm² requires external termination) |
| Mounting Type | DIN Rail (35mm) |
| Standards | BS IEC/EN 60898 (DC applications) |
1. What are the primary mega-scale applications for the DCM263C 63A DC MCB?
Multi-megawatt solar farm main combiners, massive battery energy storage systems (BESS) for grid stabilization, utility-scale DC power distribution centers, large-scale electrolysis plants, and heavy industrial DC main feeders.
2. How does 63A DC protection benefit mega-scale solar installations?
Ideal for protecting main combiner boxes aggregating multiple solar strings, typically supporting systems up to approximately 1500-1800W per circuit at standard DC voltages, essential for multi-megawatt solar farms.
3. What is the advantage of 63A rating as the DCM series maximum?
Provides the absolute highest capacity available in the DCM series, essential for the largest-scale applications where 50A circuits would be insufficient, offering maximum flexibility for demanding installations.
4. What are the critical cable considerations for 63A DC circuits?
16mm² copper conductor MINIMUM - this matches the maximum terminal capacity. For any run over 10-15m, external termination with 35mm² or 50mm² is MANDATORY. Never use smaller cable for 63A circuits.
5. Why is 63A the practical limit for DC MCBs with 16mm² terminals?
At 63A, 16mm² cable is at its absolute ampacity limit. Higher currents would generate excessive heat and voltage drop. For applications requiring >63A, consider DC MCCBs or external termination with larger cables.
