DC MCCB Circuit Breaker 320A 2P 1000V Circuit Breaker

SM8-400HPV/2P DC Molded Case Circuit Breaker — 320A

Rated for up to DC1500V in a compact 2-pole form factor, the SM8 320A suits high-voltage string protection in commercial PV and energy storage systems. It's non-polarised, so it handles both forward and reverse current without needing separate devices for each direction. Operating range is -40°C to +70°C with no derating at +50°C — no surprises on a hot roof or in a sun-baked cabinet. Arc containment is handled by a sealed extinguishing cover with three layers of free metal partition plates, keeping fault energy where it belongs during a fault interruption. Certified to IEC60947-2 and GB/T14048.2-2020, with optional shunt release, undervoltage release, auxiliary, and alarm accessories available.

Specifications

• Model SM8-400HPV/2P | 2-pole |
• Frame rated current 400A
• Rated operating current 320A
• Rated voltage  DC1500V
• Rated insulation voltage 1500V
• Impulse withstand voltage 12kV
• Short-circuit breaking capacity 10kA (DC1500V single-phase grounding)
• Icu 20kA (at 1000/1500V)
• Ics 100% Icu
• Protection degree IP20
• Pollution degree 2
• Operating temperature -40°C to +70°C
• Mechanical life 15,000 operations
• Electrical life 1,000 operations
• Release type Thermal magnetic (TMD fixed)
• Standards IEC60947-2 / GB/T14048.2-2020
• Warranty 18 months

Supplier Information

Why Use a DC Circuit Breaker to Protect Circuits?

A circuit breaker is a safety device that interrupts the flow of current in an electrical circuit to prevent damage from excessive current flow, short circuits, or electrical faults. When it comes to DC (Direct Current) circuits, using a reliable circuit breaker, like our Suntree DC 250A 2-Pole Circuit Breaker is essential for a variety of reasons.

Protection from Overcurrent:

DC circuits, like their AC counterparts, are susceptible to overcurrent conditions. An overcurrent occurs when more current flows through a circuit than it's designed to handle. Without adequate protection, components can overheat, leading to possible fires or damage to the connected equipment. Our Suntree DC 250A 2-Pole Circuit Breaker provides a quick response to overcurrent conditions, ensuring that the circuit is broken and the current flow is halted immediately.

Safe Isolation from Faults:

A short circuit or electrical fault can send a surge of current through the circuit. In such scenarios, it's crucial to disconnect the faulty part of the circuit from the power source swiftly. Our Suntree DC 250A 2-Pole Circuit Breaker acts as a robust safeguard, disconnecting the circuit almost instantaneously in case of a fault, preventing any damage or hazard.

DC-Specific Design:

DC systems have different characteristics than AC systems. While AC voltage alternates and periodically drops to zero, DC voltage remains constant. This can make breaking a DC circuit more challenging due to the continuous arc that forms when trying to interrupt the flow. Our Suntree DC 250A 2-Pole Circuit Breaker is specifically designed to handle these challenges, ensuring a quick and safe interruption of the circuit.

Flexibility and Scalability:

Whether you're setting up a small DC-powered application or a large-scale system, having a versatile solution is crucial. Our reliable Suntree DC 250A 2-Pole Circuit Breakerr offers adaptability for various applications. It can be used in multiple setups, ranging from solar panel systems to DC-powered machinery and vehicles.

Long-Term Savings:

An upfront investment in a reliable Suntree DC 250A 2-Pole Circuit Breaker can result in significant long-term savings. By preventing potential damage to your equipment and reducing the risk of fires, this circuit breaker can help avoid expensive repairs and replacements. It's an investment that pays off by ensuring the longevity and safety of your equipment.

Conclusion:

DC circuits, though distinct from AC circuits, are equally vulnerable to over currents and faults. The importance of safeguarding them with a suitable protective mechanism cannot be emphasized enough. By choosing a high-quality product like our Suntree DC 250A 2-Pole Circuit Breakerr, you are not only ensuring the safety of your DC circuit and connected equipment but also saving on potential future costs related to damages and repairs. Always prioritize safety and reliability when selecting a circuit protection solution.

Further information on these products can ber found here