25 amp 1 pole Miniature Circuit Breaker

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$53.99

Single pole miniature circuit breaker (MCB) with a 25A current rating, featuring C-curve trip characteristics compliant with IEC standards. This mini circuit breaker offers 6 kA rated impulse withstand voltage for its micro design, providing reliable protection against overloads and short circuits in electrical conductors.

SKU: ATO-MCB-1P25

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Overview
Related Video

A single pole miniature circuit breaker (MCB) is a compact mini safety switch that protects electrical circuits from overcurrent, preventing potential damage from overloads or short circuits. This 25 amp micro circuit breaker is commonly used in residential and light commercial installations.

Single Pole MCB Breaker Information

Rated Current: 25 amp
Rated Voltage: 230/400V AC, 50Hz
Number of poles: 1 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-NB8-631PC25
Rated Current		25A
Rated Voltage		230/400V
Frequency		50Hz
Number of Poles		1P
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

Single Pole MCB Breaker Dimension (Unit: mm)

Details

Tips: Miniature circuit breaker structure

A miniature circuit breaker (MCB) consists of several key components that work together to provide circuit protection. The main parts include:

Housing: Made of high-strength, fire-resistant plastic to protect internal components.
Operating Mechanism: Includes a toggle switch or lever that allows manual switching of the circuit on or off.
Contacts: Metallic components that open and close the circuit. When the mini MCB trips, these contacts separate to interrupt the current flow.
Bimetallic Strip: A thermal element that bends when exposed to excessive current, triggering a trip in case of overload.
Magnetic Coil (Solenoid): Provides instant tripping during short circuits by generating a strong magnetic force.
Arc Chute: A series of plates that dissipate and extinguish the electrical arc formed when contacts open.

These components ensure reliable circuit protection, preventing damage from overcurrent conditions in residential, commercial, and industrial applications.

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.

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Existing reviews of 25 amp 1 pole Miniature Circuit Breaker

Worked as expected and I would buy again!

Needed miniature circuit breaker for solar rated at 25 amps. Running great so far. Good disconnect switch. Had 18 amps running through it no problems. This MCB worked as expected with good quality and I would buy again.

From: Alaska | Date: 19/05/2022

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A functional 25A circuit breaker

The price was so cheap that I bought five circuit breakers at a time, and the circuit breaker in my home was aged, I changed a new one. The quality is very good, just installed, the operation is sensitive, and the circuit protection is very safe.

From: Chuck | Date: 30/11/2018

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