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The Live DCM420C 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 higher power levels. Rated at 20 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards DC circuits in applications such as industrial bipolar solar photovoltaic systems, large-scale DC distribution networks, and critical telecommunications infrastructure. 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 higher-power DC sources. With its robust construction and precision thermo-magnetic release, the DCM420C ensures complete circuit isolation and equipment protection for complex industrial 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 industrial bipolar solar PV and large-scale DC systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (100A to 200A), specifically calibrated for DC circuits with moderate inrush characteristics.
High-Capacity 20A DC Protection: Ideal for industrial bipolar solar PV strings, large-scale DC distribution, critical telecom infrastructure, and complex high-power DC applications.
Industrial System Focus: Perfect for industrial bipolar solar arrays, positive/negative/earth switching, large-scale 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 | DCM420C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (4P) |
| Current Rating (In) | 20 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 industrial applications for the DCM420C 4-pole 20A DC MCB?
Industrial bipolar solar PV systems, large-scale DC power distribution centers, telecommunications hub facilities, data center DC distribution, and manufacturing plant critical DC control systems.
2. How does 20A 4-pole protection benefit industrial bipolar solar installations?
Ideal for protecting larger industrial bipolar solar arrays, typically supporting systems up to approximately 500-600W per circuit, ensuring simultaneous disconnection of all poles for complete system isolation during maintenance.
3. What is the advantage of 20A rating over 16A for 4-pole industrial DC applications?
Provides 25% more capacity for demanding industrial systems, essential for larger bipolar solar farms, expanded telecom hubs, or applications where 16A circuits would operate at capacity limits.
4. Why is 4-pole switching critical for data center DC distribution?
Modern data centers often use bipolar DC distribution for efficiency. 4-pole switching ensures complete isolation of all conductors during maintenance, protecting critical IT infrastructure and technician safety.
5. What cable size is recommended for 20A 4-pole DC industrial circuits?
2.5mm² copper conductor minimum per pole. 4mm² strongly recommended for longer runs to minimize voltage drop in industrial settings. All four conductors must be identical size and type.
