4P 63A DZ47 Miniature Circuit Breaker

Our 4P 63A DZ47 Miniature Circuit Breaker is a high-performance circuit protection device dedicated to 3-phase 4-wire 400V power systems. It automatically trips to cut off power in case of overload, short circuit, or lightning surge, effectively preventing electrical fires and equipment damage. Made with premium flame-retardant PC material and precision engineering, it features a user-friendly design, long service life, and CE/CCC certification. It is widely used in distribution cabinets, residential buildings, industrial equipment, and commercial power systems, ensuring safe and reliable power operation.

NEW QUALITY UPGRADE & MORE DURABLE

Our DZ47-63 MCB has undergone comprehensive quality upgrades. From material selection to final assembly, every component is strictly inspected. It boasts 10,000 times electrical life  and 20,000 times mechanical life , tested and certified by the Zhejiang Low Voltage Electrical Product Quality Inspection Center. The thermosetting shell offers excellent heat resistance, impact resistance, and self-extinguishing performance, while high-quality copper terminals ensure stable conductivity. Each product passes strict aging and withstand voltage tests before delivery, enabling long-term stable operation in harsh industrial environments.

STRUCTURAL ANALYSIS

The MCB adopts a compact and scientific structure, with 4 core design highlights:

1.  WIDENING D-TYPE HANDLE : Ergonomic curvature conforming to human habits, improving operational comfort and intuitive on/off control.

2.  GUIDE RAIL BUCKLE : Standard DIN35mm rail mounting, convenient and fast snap-in installation for distribution cabinets.

3.  LARGE INTERFACE TERMINALS : High-quality copper terminals effectively prevent breakage and leakage, ensuring secure wiring and low loss.

4.  THERMOSETTING SHELL : Flame-retardant PC material with heat resistance, impact resistance, and self-extinguishing properties, providing reliable safety protection.

ERGONOMIC D-TYPE HANDLE FOR COMFORTABLE OPERATION

Equipped with a large D-shaped widened handle designed to fit human operating habits. The curved handle curvature improves operational comfort, reducing fatigue during frequent switching. The red high-visibility handle ensures clear status recognition, making it easy to operate even in dim environments.

WIDE TEMPERATURE ADAPTABILITY

The MCB features excellent high and low temperature resistance, with a working temperature range of -35°C to 70°C . It operates stably in extreme cold (alpine regions) and high-temperature (desert, industrial workshops) environments, ensuring reliable circuit protection in various climate conditions.

OUR PRODUCTS VS. OTHER PRODUCTS

SIX CORE SELLING POINTS

•  OVERLOAD & SHORT CIRCUIT PROTECTION : Dual protection to safeguard circuits and electrical equipment from damage.

•  FLAME RETARDANT SHELL : High-strength thermosetting PC material, heat-resistant, impact-resistant, and self-extinguishing.

•  ERGONOMIC D-TYPE HANDLE : Widened curved design for comfortable, effortless operation.

•  VISUAL STATUS WINDOW : Clear on/off indication, eliminating operational risks and accidents.

•  WIDE TEMPERATURE RESISTANCE : -35°C to 70°C operating range, adaptable to all climate environments.

•  AUTHORITATIVE CERTIFICATION : CE, CCC certified, meeting IEC60898-1 and GB10963.1 international safety standards.

STURDY & FLAME RETARDANT SHELL

The shell is made of high-performance thermosetting PC material, with a smooth, burr-free surface and excellent mechanical strength. It features outstanding flame retardancy, heat resistance, impact resistance, and self-extinguishing properties, effectively preventing fires caused by short circuits and overloads. The material is also anti-aging and corrosion-resistant, ensuring long-term safe use in various complex environments.

HIGH-QUALITY TERMINALS & EASY WIRING

Equipped with large, high-quality interface terminals made of high-conductivity copper. The pressure plate wiring board design ensures secure, firm wiring, effectively preventing breakage and leakage. The large terminal space accommodates thick wires, making installation easier and more reliable, with strong overload capacity and low power loss.

STANDARD DIN RAIL MOUNTING

Designed for universal DIN35mm standard guide rail installation, with a convenient snap-in buckle. It is compatible with all standard distribution cabinets, electrical control boxes, and power distribution systems, enabling fast, tool-free installation and disassembly, suitable for quick deployment in various scenarios.

4P INSTALLATION WIRING DIAGRAM

Connect the 3-phase 400V power supply inlet (3 live wires + 1 neutral wire) to the upper terminals of the 4P MCB.

Connect the load (equipment) to the lower terminals of the MCB, matching the phase sequence and neutral wire.

Ensure all wiring is firmly tightened to avoid overheating and loose connections.

Switch on the MCB to confirm normal power supply.

Note: This 4P circuit breaker is a three-phase four-wire device, used to connect three live wires and one neutral wire for 380V/400V three-phase power systems.

PRODUCT PARAMETERS

SELECTION GUIDE

1. How to Calculate the Number of Amperes?

Formula: Current (A) = Power (W) / Voltage (V) . Calculate the required current based on the power of your electrical appliances.

2. How to Choose the Pole Number?

•  1P : Single pole, 1 module (18mm wide), for 230V live wire only (no neutral).

•  1P+N : 1 module (18mm wide), for 230V live + neutral.

•  2P : 2 modules (36mm wide), for 230V live + neutral.

•  3P : 3 modules (54mm wide), for 400V 3-phase live wires.

•  4P : 4 modules (72mm wide), for 400V 3-phase + neutral (this product).

3. How to Choose Ampere Rating?

Match the breaker rating to the wire and appliance power to avoid tripping or terminal overheating. Refer to the table below:

4. Can I Choose a Larger One?

No.  Always select a breaker with a current rating smaller than the wire's maximum carrying capacity . For example, a 2.5mm² BV wire can withstand a maximum of 26A, so a 25A or lower breaker must be selected.

WIDELY USED

Our 4P 63A DZ47 Miniature Circuit Breaker is widely used in:

•  RESIDENTIAL BUILDINGS : Home distribution box, 3-phase 4-wire power supply protection

•  COMMERCIAL BUILDINGS : Office building, shopping mall, hotel power distribution system

•  INDUSTRIAL EQUIPMENT : Factory workshop, production line 3-phase power control and protection

•  DISTRIBUTION CABINETS : Power distribution box, electrical control cabinet main switch

•  RENEWABLE ENERGY : Solar power system, wind power generation distribution protection

•  INFRASTRUCTURE : Public facilities, street lighting, communication base stations power protection

FAQ 

1. WHAT IS THE MAIN FUNCTION OF THIS 4P 63A DZ47 MCB?

It is a 3-phase 4-wire circuit protection device that provides overload protection  and short circuit protection . It automatically trips to cut off the power supply when the circuit is overloaded or short-circuited, preventing electrical fires and equipment damage, ensuring the safety of the power system.

2. WHAT IS THE RATED VOLTAGE AND CURRENT OF THIS PRODUCT?

This is a 4P 63A model, with a rated voltage of 400V~  (suitable for 3-phase 4-wire power systems) and a rated current of 63A , with a breaking capacity of 4000A.

3. WHAT IS THE INSTALLATION METHOD?

It supports standard DIN35mm guide rail mounting , with a snap-in buckle design for quick and easy installation, compatible with all standard distribution cabinets.

4. WHAT IS THE OPERATING TEMPERATURE RANGE?

The product has excellent temperature adaptability, with a working temperature range of -35°C to 70°C , suitable for use in extreme cold and high-temperature environments.

5. HOW TO CHOOSE THE CORRECT CIRCUIT BREAKER RATING?

First, calculate the required current using Current = Power / Voltage, then select a breaker rating smaller than the maximum carrying capacity of the wire  to ensure safety. Refer to our selection guide table for detailed matching.

6. WHAT CERTIFICATIONS DOES THIS PRODUCT HAVE?

Our DZ47-63 MCB has passed CE certification  (compliant with EU standards) and CCC certification  (compliant with Chinese national standards), and meets IEC60898-1 and GB10963.1 international safety standards.