MOREDAY AC Moulded Case Circuit Breaker New 1p 2p 3p 4p Mccb 400amp

Molded case circuit breakers can automatically cut off the current after the current exceeds the trip setting. Plastic case refers to the use of plastic insulators as the outer casing of the device to isolate the conductors and the grounded metal parts. Molded case circuit breakers typically contain a thermal-magnetic trip unit, while larger models are equipped with solid-state trip sensors. The trip unit is divided into: thermal magnetic trip and electronic trip. Commonly used rated currents are as follows: 16, 25, 30, 40, 50, 63, 80, 100, 125, 160, 200, 225, 250, 315, 350, 400, 500, 630A.


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Protection against overload – currents above the rated value that last longer than what is normal for the application.

Protection against electrical faults – During a fault such as a short circuit or line fault, there are extremely high currents that must be interrupted immediately.

Switching a circuit on and off – This is a less common function of circuit breakers, but they can be used for that purpose if there isn’t an adequate manual switch.

The wide range of current ratings available from molded-case circuit breakers allows them to be used in a wide variety of applications. MCCBs are available with current ratings that range from low values such as 15 amperes, to industrial ratings such as 2,500 amperes. This allows them to be used in both low-power and high-power applications.

MDM1 series molded case circuit breaker, rated voltage up to AC1000V, current up to 400A. AC800V voltage breaking capacity up to 30kA, can realize the system short circuit protection.

Equipped with the protection devices for over-current, short circuit and under voltage, the product is capable of preventing damage of circuits and supply units. The product conforms to IEC60947-2 standard.


Protect your electrical equipment:

1. Protection against overload

2. Electric fault protection

3. Switching a circuit on and off

4. Prevent Fires 


Q 1: What's the rated current range you can offer?

A: We offer DC MCB from 1A to 125A, and DC MCCB from 63A to 630A.


Q 2: What's your DC MCB quality?
A: Our DC MCB is designed for solar PV system, all the parts in the DC MCB are for direct current standard. Not all the MCB are DC MCB!


Q 3: What's your production capacity of DC MCB?
A: We can make 300,000 pole one month. If you have order plan, feel free to contact me, I will tell you delivery time according to your demand.


Q 4: Do you have a catalog? Can you send me the catalog to check all your products?
A: Yes, We have catalogue. Please contact us for catalog.


Q 5: Can you help me to select suitable products?
A: Sure, please send us inquiry and tell us your demand, we have professional team  to support you in model selection.

Q 6: How you control quality?

A: Our production strictly follow ISO9001 quality control system, after four time  qulatiy  inspect and high temperature testing we will print "QA"pass, also  we  have  ERP system for more convinent management&Delivery control.

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