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Suitable for indoor use.
The Live DCM406C 4 Pole DC MCB is a specialized multi-pole direct current miniature circuit breaker engineered to provide comprehensive protection for complex DC electrical circuits requiring simultaneous switching of multiple conductors. Rated at 6 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards DC circuits in applications such as bipolar solar photovoltaic systems, telecommunications DC distribution, and specialized industrial DC networks. It features a 6kA breaking capacity suitable for 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 DCM406C ensures complete circuit isolation and equipment protection for complex renewable energy and industrial DC applications requiring multi-pole switching.
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 standard DC installations including bipolar solar PV and telecom systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (30A to 60A), specifically calibrated for DC circuits with moderate inrush characteristics.
Precision 6A DC Protection: Ideal for small bipolar solar PV strings, telecom DC distribution, control systems, and complex DC applications.
Bipolar System Focus: Perfect for bipolar solar arrays, positive/negative/earth switching, telecommunications power distribution, and specialized industrial DC 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 | DCM406C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (4P) |
| Current Rating (In) | 6 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 applications for the DCM406C 4-pole 6A DC MCB?
Bipolar solar PV systems requiring positive, negative, and earth switching, telecommunications DC distribution, battery banks with multiple taps, specialized industrial control circuits, and research laboratory DC systems.
2. Why choose a 4-pole DC MCB over multiple 2-pole breakers?
Ensures simultaneous disconnection of all related conductors, critical for bipolar systems where one leg remaining live could create dangerous voltage differentials or equipment damage during maintenance.
3. How does 4-pole switching benefit bipolar solar installations?
Bipolar solar arrays (positive, neutral/earth, negative) require all conductors to be switched simultaneously to ensure complete isolation and prevent potential differences that could damage inverters or create safety hazards.
4. What is the advantage of C-Curve for 4-pole DC applications?
C-Curve (5-10x In) handles the moderate inrush from DC-DC converters, inverters, and battery charging systems in complex configurations without nuisance tripping while maintaining excellent fault protection.
5. What cable size is recommended for 6A 4-pole DC circuits?
1.5mm² copper conductor minimum per pole. 2.5mm² recommended for mechanical robustness. All four conductors must be identical size and type for balanced protection.
