AC MCCB 400A 3 Pole AC400V

Rated Current (In)	400A
Rated Voltage (Ue)	AC 400V
Breaking Capacity (Icu/Ics)	55kA/42kA
Number of Poles	3P (3 Poles)
Mounting Method	Fixed or Plug-in
Mechanical Life	≥20,000 operations
Electrical Life	≥10,000 operations
Thermal Protection	Keeps things cool by tripping when it senses an overload. No meltdowns here!
Magnetic Trip	Lightning-fast response to short circuits—bam! Problem solved.
400A Rating	Handles heavy-duty currents like a champ, perfect for high-power applications.
Compact Design	Fits snugly in your setup without hogging space.
Durable Construction	Built tough to last, even in harsh environments.

Product Description：

This 400A thermal-magnetic molded case circuit breaker is the real deal. Built for reliability and performance, it’s designed to safeguard your electrical systems like a pro. Whether it’s an overload or a short circuit, this breaker handles it with ease—keeping your operations safe, stable, and running smoothly. Ideal for both commercial and industrial applications.

Functional Features：

Dual Protection Mechanism:Thermal Protection Function: Intelligently detects overload conditions, automatically trips to prevent equipment from overheating, ensuring system safety.Magnetic Protection Function: Rapidly responds to short-circuit faults, instantly cutting off the circuit to effectively protect equipment and wiring.

High Reliability: Casing made of high-quality polycarbonate (PC), polypropylene (PP), and other plastic materials, offering excellent insulation and impact resistance.

Precise Protection: Equipped with a built-in thermal-magnetic trip unit, accurately detecting overload and short-circuit faults for rapid protection.

Flexibility: Modular design allows for expandable accessories (e.g., auxiliary contacts, alarm contacts, etc.).

High Safety: Features isolation functionality to ensure the safety of maintenance personnel.

Easy Installation: Compact design saves panel space and supports rail mounting or bolt fixing.

Application Scenarios：

The 400A molded case circuit breaker is a top choice for a wide range of electrical protection needs. Its outstanding performance, dependable safety features, and flexible installation make it ideal for diverse environments:

Industrial Plants: Ensures stable and secure power distribution in heavy-duty operations.

Commercial Buildings: Delivers reliable circuit protection for complex electrical systems.

Residential Power Systems: Enhances safety and efficiency in home energy distribution setups.

Compliance Standards：

International Standard: IEC 60947-2

National Standard: GB 14048.2

Other Certifications: CE

Packaging And Transportation：

Packaging Method: Each unit is packaged in a cardboard box with an included product manual.

Transportation Method: Standard logistics transportation with moisture-proof and shock-proof handling.

Specification：

Specification	Details
Rated Current (In)	400A
Rated Operational Voltage (Ue)	400 V AC
Rated Insulation Voltage (Ui)	800 V
Rated Impulse Voltage (Uimp)	8 kV
Number of Poles	3
Frame Size	400A
Short Circuit Breaking Capacity (Icu)	55kA
Rated Frequency	50/60 Hz
Operating Temperature	-5°C to +55°C
Standards Compliance	IEC 60947-2
Place of origin	China
Brand Name	Nuomake
Model Number	HMKM1-400/3p
Minimum Order Quantity	1 set
External Components	4 Pieces of Arc Barrier Insulation,6 Units of Screws and 6 Units of Nuts
Packaging details	Inner box (white) and outer box (yellow)
Product weight	4.3kg
Delivery time	1 days
Payment terms	T/T Western Union
Supply ability	15000 sets/month