125A 2P C-Curve DC Miniature Circuit Breaker

Unlike AC circuit breakers, the MORA C120HDC 2P C125A DC Miniature Circuit Breaker from Pugao Electric adopts a dedicated arc extinguishing structure, which can quickly extinguish DC arcs under high fault currents, prevent fires, and protect expensive batteries, inverters, and photovoltaic modules. After troubleshooting, it can be manually closed and reset without the need to replace components, effectively reducing operation and maintenance costs. As the source factory, Pugao Electric supports OEM laser marking and parameter customization, and can flexibly undertake foreign trade trial orders and large-scale orders, supplying to global customers.

Dedicated DC MCB for solar PV and energy storage system. It provides overload and shortcircuit protection, no residual current protection. 2pole linked design. Only copper wire connection. Installed on standard 35mm DIN rail.

Product Features

1. Simultaneous 2-pole isolation: The 2P C125A DC Miniature Circuit Breaker can simultaneously cut off the positive and negative DC lines, achieving safe isolation during maintenance and repair.

2. C-curve magnetic trip: 5-10 times the rated current magnetic trip, suitable for DC loads with moderate surge current such as battery packs and inverter inputs.

3. Millisecond arc extinction: Design for DC fault arc and complete short-circuit protection tripping in milliseconds.

4. High temperature resistance: Through the 960 ℃ hot wire test, the resistance to ignition, impact, and high temperature environment performance is stable.

5. Anti-welding contacts: Resistance to welding under high fault current, low contact resistance, and low heat generation during long-term heavy load operation at 125A.

6. Large copper wire terminals: The 2P C125A DC Miniature Circuit Breaker is compatible with large-sized copper wires, with sufficient tightening torque and stable long-term heavy-duty connections.

7. Long service life: Excellent mechanical and electrical lifespan — electrical lifespan ≥ 8000 times, mechanical lifespan ≥ 20000 times, with a long service life.

Working Principle

Like AC miniature circuit breakers, the 2P C125A DC Miniature Circuit Breaker has dual protection for overload and short circuit, but its structure is optimized for DC arc:

1. Overload protection: When the continuous DC current exceeds the rated 125A, the internal bimetallic strip is heated and bent, triggering the trip mechanism and slowly cutting off the circuit.

2. Short circuit protection: Once a DC short circuit occurs, the huge instantaneous current causes the electromagnetic coil to instantly generate strong magnetic force, quickly opening the contacts; the multi-chamber arc extinguishing chamber immediately extinguishes the DC arc and completes the disconnection.

After the fault is eliminated, manually turn the operating handle back to the ON position to restore DC power supply.

Product Interpretation

MORA C120HDC 2P DC Miniature Circuit Breaker (DC MCB, without leakage)

Basic Parameters

Product Highlights

DC dedicated MCB, prohibited for use in AC circuits, suitable for high-power protection of photovoltaic power plants and energy storage DC main circuits.

2-pole linkage structure, simultaneously cutting off DC positive and negative poles, ensuring safer high-voltage DC isolation.

The C-trip curve can withstand the impact current of photovoltaic systems and reduce false tripping.

Protection function: overload protection + short circuit protection, no leakage protection.

Installation: suitable for 35mm standard DIN rail installation, commonly used for photovoltaic combiner boxes, energy storage distribution cabinets, and main incoming lines.

Typical Application Scenarios

Installation tip: Install inside the protective distribution box; the polarity of the DC positive and negative connections must be distinguished. It is strictly prohibited to use AC dedicated MCBs for DC circuit protection.

Why Choose Pugao Electric DC Circuit Breaker

Source factory since 2011: Zhejiang Pugao Electric Power, established in 2011, has a 5000 square meter production workshop with no middleman markup and supports bulk procurement and trial orders.

Factory inspection: Each product undergoes automatic testing for DC overload, short circuit, and temperature rise. The entire process from raw materials to finished products can be traced, and the defect rate is controllable.

Support OEM/ODM customization: laser engraving of your own brand logo, color adjustment of the shell, parameter customization, and customized packaging can all be achieved.

Fully qualified: ISO9001 quality system certification, products strictly follow IEC international standards.

Flexible minimum order quantity: 2P C125A DC Miniature Circuit Breaker supports samples, small batch trial orders, and full container large orders, suitable for customers' business development stages, and can apply for sample testing performance.

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FAQ

Q1: Can this 2P C125A DC circuit breaker be used in AC circuits?

A: This model is designed with optimized DC arc extinguishing structure and is not recommended for use in AC circuits. Please choose our corresponding AC MCB series for AC scenarios.

Q2: What is the maximum supported DC voltage?

A: The 2P C125A DC Miniature Circuit Breaker standard model has a maximum rated DC voltage of 500V DC. If a higher voltage version is required, please contact sales for customization.

Q3: Can I print my own brand logo on the circuit breaker?

A: Support laser marking and OEM branding. Please provide brand documents so that we can calculate the quotation for you.

Q4: What is the minimum order quantity for this DC miniature circuit breaker?

A: The minimum order quantity is flexible, supporting sample and small trial orders, and can also undertake bulk orders of full containers. Contact us for detailed quotations.

Q5: After a DC short circuit trip, is it necessary to replace the circuit breaker?

A: If it is only an overload or mild short circuit fault tripping, manually reset the handle after troubleshooting to continue use. If a serious short circuit occurs and causes damage to internal components, the circuit breaker needs to be replaced.