40 amp 4 pole Miniature Circuit Breaker

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$83.29

ATO 4 pole MCB miniature circuit breaker features a 40 amp current rating with a C trip curve, ensuring reliable protection against overloads and short circuits in electrical systems. This C40 mini circuit breaker is designed with a 6kA breaking capacity, providing enhanced protection for both commercial and industrial applications.

SKU: ATO-MCB-4P40

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Overview
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4 pole MCB miniature circuit breaker is rated for 40 amps with a C trip curve, offering dependable overload and short circuit protection for electrical systems. This mini circuit breaker features a 6kA breaking capacity, delivering superior protection in both commercial and industrial settings.

4 Pole MCB Breaker Information

Rated Current: 40 amp
Rated Voltage: 230/400V AC, 50Hz
Number of poles: 4 pole
6 kA rated short-circuit breaking capacity
Compliant with IEC standard
C curve trip characteristic
With overload protection and short circuit protection function

Technical Data

Model		ATO-NB8-634PC40
Rated Current		40A
Rated Voltage		230/400V
Frequency		50Hz
Number of Poles		4P
Mechanical Life		20000 Times
Electrical Life		10000 Times
Rated Short-Circuit Breaking Capacity		6000A
Operating Short-Circuit Breaking Capacity		6000A
Rated Impulse Withstand Voltage (1.2/50)		6kV
Dielectric Test Voltage		2000V (50Hz, 1 min)
Heat & Humidity Resistance		28 Cycles
Vibration Resistance		No Obvious Vibration and Impact
Terminal Block	Terminal Block Type	Pillar Terminal Block
	Min. Terminal Size Acceptability	1mm²
	Max. Terminal Size Acceptability	25mm²
	Standard Connection Torque	2 N.m
	Max. Tolerable Torque	2.5 N.m
	Wire Insertion Depth	13mm
Reference Temperature		30℃
Operating Temperature		-35℃~+70℃
Storage Temperature		35℃~+85℃
Applicable Altitude		2000m
Tripping Mode		Thermal Magnetic Trip
Electromagnetic Tripping Type		Type C (5In-10In)
Shell Flame Retardant Grade		V0
Wire Entry Method		Both Upper and Lower
Installation Method		TH35-7.5 Standard Rail
Protection Level	Direct Installation	IP20B
	Installed in the Distribution Box	IP40B

4 Pole MCB Breaker Dimensions (Unit: mm)

Details

Tips: Main parameters of miniature circuit breaker

A miniature circuit breaker (MCB) is an essential component used for protecting electrical circuits from overload and short circuits. Here are the main parameters to consider when selecting an MCB:

Rated Current (In): The maximum current the MCB can carry without tripping, typically measured in amperes (A).
Breaking Capacity (Icu): The maximum fault current the mini circuit breaker can interrupt without causing damage, expressed in kA.
Tripping Curve: Defines the time it takes for the MCB to trip at different levels of overcurrent. Common types include B, C, and D curves, each suitable for different applications.
Rated Voltage (Un): The voltage the micro circuit breaker is designed to operate at, usually 230V or 400V for residential or industrial systems.
Poles: The number of poles (single, double, triple, or four-pole) depends on the configuration of the circuit.
Environmental Conditions: Consider temperature, humidity, and altitude ratings for optimal performance.

Types of Circuit Breakers

In this video, we'll take a closer look at the meaning behind these abbreviations and explain the types of circuit breakers they represent. By understanding the different types of circuit breakers on the market, you can make an informed decision and choose the right type for your specific requirements, thereby enhancing the protection of your electrical infrastructure.

Isolator vs Circuit Breaker

Although isolators and circuit breakers have similar functions in a circuit, they are two separate entities. This video explains you the difference between the two devices in terms of working, features, operation, affordability, etc. You can choose between them based on your specific requirements.

Essential Electronic Components in Electrical Systems

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Existing reviews of 40 amp 4 pole Miniature Circuit Breaker

Would buy again.

This 4 pole MCB is very easy to install. I have mine mounted on a board and use it for solar panels. It works great. I will definitely buy again when I upgrade my solar system. Good quality.

From: Aaron | Date: 28/10/2022

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Nice 40 amp 4 pole MCB.

I used this miniature circuit breaker for solar wiring before my MPPT. It seems to be doing the job. Very nice and good quality. Good value for the money. I will recommend it to my neighbors and friends.

From: Stefan | Date: 28/06/2022

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