Custom printed panels are non-returnable.
Please upload the image, photo, or logo you would like printed on the LED panel.
Recommended image size:• 600 × 600 pixels or higher resolutionAccepted file formats:• JPG• PNG• PDF
Availability: Low stock: 88 left
Couldn't load pickup availability
Once you receive your order confirmation email, your order will be processed within 2–3 business days (excluding weekends and public holidays).
Installation must be carried out by a qualified electrician.
Ensure power is switched off before installation.
Suitable for indoor use.
The Live DCM440C 4 Pole DC MCB is a very 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 very high power levels. Rated at 40 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards DC circuits in applications such as mega-scale industrial bipolar solar photovoltaic systems, massive DC distribution networks, and critical infrastructure telecommunications. 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 very high-power DC sources. With its robust construction and precision thermo-magnetic release, the DCM440C ensures complete circuit isolation and equipment protection for complex mega-scale renewable energy and massive DC applications requiring multi-pole switching at very high 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 the most demanding DC installations including mega-scale industrial bipolar solar PV and massive DC systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (200A to 400A), specifically calibrated for DC circuits with moderate inrush characteristics.
Very High-Capacity 40A DC Protection: Ideal for mega-scale industrial bipolar solar PV strings, massive DC distribution networks, critical telecom infrastructure, and complex high-power DC applications.
Mega-Scale Focus: Perfect for mega-scale bipolar solar farms, positive/negative/earth switching, massive 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 | DCM440C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (4P) |
| Current Rating (In) | 40 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 | 16mm² (25-35mm² 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 DCM440C 4-pole 40A DC MCB?
Mega-scale bipolar solar farms, massive DC power distribution centers, telecommunications hub infrastructure, data center main DC distribution, and heavy industrial DC control systems with very high power requirements.
2. How does 40A 4-pole protection benefit mega-scale bipolar solar installations?
Ideal for protecting the largest mega-scale bipolar solar arrays, typically supporting systems up to approximately 1000-1100W per circuit, ensuring complete simultaneous disconnection of all poles for maximum system safety.
3. What is the advantage of 40A rating over 32A for 4-pole mega-scale DC applications?
Provides 25% additional capacity for the absolute largest-scale systems, essential for massive solar farms, expanded telecom infrastructure, or applications where 32A circuits would be insufficient.
4. What are the critical cable considerations for 40A 4-pole DC circuits?
10mm² copper conductor minimum per pole. 16mm² matches terminal capacity. For runs over 15m, external termination with 25mm² or 35mm² is required. All four conductors must be identical size.
5. Why is 40A near the practical limit for 4-pole DC MCBs with 16mm² terminals?
At 40A, 16mm² cable is approaching its ampacity limit. Higher currents would generate excessive heat. For applications requiring >40A with 4-pole switching, consider DC MCCBs or external termination arrangements.
