20 amp 3 pole Miniature Circuit Breaker

5 out of 5 based on 3 reviews | Write a review

$71.39

Three pole DIN rail mountable miniature circuit breaker is rated at 230/400V AC supply with 6kA short circuit breaking capacity. Short-circuit protection, with C curve trip characteristic.

SKU: ATO-MCB-3P20

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Delivery date: 6-12 days

Overview

Circuit Breaker Information

Rated Current: 20 amp
Rated Voltage: 230/400V AC, 50Hz
Number of poles: 3 pole
6 kA short circuit interrupting capacity
35mm DIN rail mounted
It can be manually switched ON and OFF as similar to normal switch if necessary
Thermal-magnetic overcurrent protection, short circuit protection, with C curve trip characteristic

Technical Data

Model		ATO-NB8-633PC20
Electrical Parameters	Height	86 mm
	Width	18 mm per pole
	Mounting	DIN Rail
	Rated Current (In)	20A
	Number of poles	3P
	Rated Voltage (Ue)	230/400V
	Rated Insulation Voltage (Ui)	500V
	Dielectric Test Voltage	2000V
	Reted Frequency	50Hz
	Short Circuit Interrupting Capacity	6KA
	Trip Characteristic	C Curve (5-10In)
	Rated Short-Circuit Breaking Capacity	6000A
	Operating Short-Circuit Breaking Capacity	6000A
Mechanical Parameters	Electrical Life	10000 times
	Mechanical Life	20000 times
	Flame Retardant Grade	V0
	Protection Degree	Direct installation: IP20B Installed in the distribution box: IP40B
	Calibration Temperature	30℃
	Operating Temperature	-35℃~+70℃
	Storage Temperature	-35℃~+85℃
	Tightening Torque	2 N.m
	Max. Tolerable Torque	2.5 N.m
	Terminal Size Acceptability–Min/Max	1 mm² / 25mm²
	Wire Insertion Depth	13mm

Circuit Breaker Dimension (Unit: mm)

20 amp 3 pole Miniature Circuit Breaker Dimensions

Tips: Motor protection circuit breaker selection
There are two features for motor as follows: Firstly, starting current is several times of rated current. Secondly, it has certain overload capacity. In order to ensure motor operation is reliable, circuit breaker should be chosen in accordance with these two features of motor.
How to choose a motor protective circuit breaker?

The long time delay action current setting value is determined by the rated current of motor.
The returnable time of 6 times of long time delay action current setting value of circuit breaker is larger than the actual starting time of motor.
Instantaneous action current setting value of circuit breaker: Cage motor should be 8 to 15 times as large as the rated current of releaser; winding motor should be 3 to 6 times as large as the rated current of releaser.

Existing reviews of 20 amp 3 pole Miniature Circuit Breaker

Good circuit breaker and arrived on time.

Good circuit breaker and arrived on time. I installed it for heat pump as the old one was burnt. Works fine and no issues so far.

From: Jules G. | Date: 05/11/2018

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Great buy.

I ordered this MCB as a DIN rail switch for solar panels. Very easy to install and works great. This is an easy and an inexpensive way to protect your equipment. Great buy.

From: Lizard | Date: 30/05/2022

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Just what I needed.

This MCB is just what I needed. Using this as a switch on the DC input side of my photovoltaic charge controller. The DIN rail in wide enough for me to install a surge and lightning protector next to it.

From: Stefan | Date: 27/10/2022

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