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The Schneider Electric C65H-DCC6A functions as a high-performance miniature circuit breaker (MCB) purpose-built for direct current (DC) applications. As a core component of the Multi 9 C65H series, this 2-pole...
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The Schneider Electric C65H-DCC6A functions as a high-performance miniature circuit breaker (MCB) purpose-built for direct current (DC) applications. As a core component of the Multi 9 C65H series, this 2-pole breaker provides essential overload and short-circuit protection for low-voltage DC networks. It utilizes a thermal-magnetic tripping mechanism with a C-curve characteristic, specifically calibrated to handle moderate inrush currents while maintaining tight protection for sensitive electronics. We supply this unit as 100% Brand New and Original, ensuring critical safety for solar photovoltaic (PV) arrays, telecommunications infrastructure, and battery energy storage systems (BESS).
| Parameter | Specification |
| Manufacturer | Schneider Electric |
| Model Number | C65H-DCC6A |
| Number of Poles | 2P |
| Rated Current ($I_n$) | 6 A |
| Tripping Curve | C Curve |
| Rated Operational Voltage ($U_e$) | 250 V DC |
| Breaking Capacity ($I_{cu}$) | 10 kA at 250 V DC (IEC 60947-2) |
| Impulse Withstand Voltage ($U_{imp}$) | 5 kV |
| Mechanical Endurance | 20,000 cycles |
| Electrical Endurance | 10,000 cycles |
| Mounting Support | 35 mm symmetrical DIN rail |
| Terminal Capacity | 1 mm² to 25 mm² (Rigid cables) |
| Operating Temperature | -30 °C to +70 °C |
| Standards | IEC 60947-2, IEC 60898-2 |
Superior Arc Suppression: Unlike standard AC breakers, the C65H-DCC6A features specialized internal permanent magnets to pull DC arcs into the chutes. This design ensures rapid quenching of direct current arcs, which are naturally more difficult to extinguish than AC.
Optimized Renewable Integration: The C-curve characteristic perfectly balances the requirements of solar inverters and battery chargers. It prevents nuisance tripping during initial capacitor charging while responding instantaneously to short-circuit faults in the DC bus.
Industrial Environmental Resilience: The module operates reliably across an extended temperature range from -30°C to +70°C. This thermal stability makes it ideal for outdoor-rated PV combiner boxes and unconditioned telecommunication shelters.
Compact DIN-Rail Efficiency: Occupying only 36mm of rail width, this breaker maximizes space within crowded control panels. The modular format allows for rapid integration with other Multi 9 accessories, such as auxiliary contacts and shunt trips.
Does the C65H-DCC6A require specific polarity during wiring?
Yes. DC circuit breakers are polarity sensitive due to the magnetic arc-quenching design. You must follow the terminal markings (+/-) indicated on the front or side of the device to ensure the arc is correctly directed into the arc chute during a fault. Failure to observe polarity can damage the breaker.
Can I use this 250V DC breaker for higher voltage solar strings?
This specific model is rated for 250V DC. If your solar array output or battery bank exceeds this operational voltage, you must utilize a higher-rated model or connect multiple poles in series as per Schneider’s technical wiring diagrams to increase the dielectric strength.
What is the breaking capacity of this unit?
The C65H-DCC6A provides a high breaking capacity of 10 kA. This rating ensures the breaker can safely interrupt high-magnitude fault currents without exploding or welding the contacts, protecting the downstream cables and expensive DC equipment.
