DC MCCB 125A 1000V – YeM6-125PV Solar Molded Case Circuit Breaker for PV Systems

CNC Electric YeM6-125PV DC Molded Case Circuit Breaker (MCCB) is specifically engineered for high-voltage direct current (DC) applications including solar photovoltaic (PV) systems, battery banks, energy storage systems (ESS), and industrial DC distribution networks.

Designed to handle up to DC 1000V and 125A, this heavy-duty DC breaker ensures reliable protection against overload, short circuit, and fault currents in modern solar power installations.

Built according to IEC 60947-2 standards, the YeM6-125PV offers exceptional breaking capacity, durability, and long operational life — making it ideal for commercial and industrial solar systems.

 Technical Specifications

• Model: YeM6-125PV
• Rated Operational Voltage (Ue): DC 1000V
• Rated Current (In): 125A
• Breaking Capacity (Icu/Ics): 10kA / 7.5kA
• Rated Insulation Voltage (Ui): 1000V
• Impulse Withstand Voltage (Uimp): 8kV
• Standard Compliance: IEC 60947-2
• Category: A (+40°C)
• Poles: 2 Pole (DC Application)
• Trip Mechanism: Thermal-Magnetic
• Push to Trip Button: Yes (Manual Testing Feature)

 Key Features

 Designed for Solar PV Systems

Unlike standard AC breakers, this DC MCCB is specifically engineered to interrupt high-voltage DC arcs safely — which is critical in solar installations operating at 600V–1000V DC.

 High Breaking Capacity – 10kA

Ensures strong protection against short circuits in large PV arrays and commercial solar plants.

 Thermal-Magnetic Protection

• Thermal protection for overload conditions
• Magnetic protection for instantaneous short-circuit protection

This dual mechanism ensures complete system safety.

 Push-to-Trip Function

Allows manual testing of breaker operation without creating an electrical fault — ideal for maintenance checks.

 Heavy-Duty Industrial Construction

The molded case housing is designed for high mechanical strength, superior insulation, and long service life in harsh environments.

 Applications

This DC MCCB is ideal for:

• Solar PV combiner boxes
• Solar inverter input/output protection
• Battery storage systems
• DC distribution panels
• Industrial DC power systems
• Off-grid solar systems
• Hybrid solar installations

 Why DC MCCB is Important in Solar Systems

In solar applications, DC current does not naturally pass through zero like AC current. This makes arc extinguishing more difficult. A standard AC breaker is not safe for high-voltage DC systems.

The CNC YeM6-125PV is specially designed to:

• Safely extinguish DC arcs
• Prevent fire hazards
• Protect expensive inverters
• Protect battery banks
• Prevent cable overheating
• Improve overall system reliability

Using a proper DC-rated MCCB significantly reduces fire risk in solar installations.

 Safety & Compliance

• CE Certified
• IEC 60947-2 compliant
• Designed for high impulse voltage withstand (8kV)
• Reliable operation at 40°C ambient temperature

 Installation Guidance

• Install in a properly rated DC distribution board
• Use appropriate cable sizing based on current load
• Ensure correct polarity (LINE & LOAD marked on device)
• Mount securely with adequate ventilation
• Recommended for professional installation

For large solar systems (50kW – 1MW+), this breaker is suitable for DC main protection.

 Why Choose CNC Electric DC MCCB?

• Specifically designed for DC applications
• Proven performance in solar industry
• High durability & long lifespan
• Strong short-circuit breaking capacity
• Reliable brand for industrial electrical protection