MPN

Eaton xEffect MCB, 3P, 40A Curve C, 240 → 415V AC, 10 kA Breaking Capacity

RS Stock No.:: 847-3374
Mfr. Part No.:: 278877 FAZ-C40/3
Brand:: Eaton

Eaton xEffect MCB, 3P, 40A Curve C, 240 → 415V AC, 10 kA Breaking Capacity

Subtotal (1 unit)*

£102.17

(exc. VAT)

£122.60

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

4 unit(s) ready to ship
Plus 3 unit(s) shipping from 15 September 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	£102.17

*price indicative

RS Stock No.:: 847-3374
Mfr. Part No.:: 278877 FAZ-C40/3
Brand:: Eaton

Eaton MCB, 40A Current Rating, Type C Tripping Characteristics - 278877 FAZ-C40/3

This Eaton MCB is designed for efficient circuit protection. As a three-pole unit with a current rating of 40A, it ensures optimal functionality across various applications. The compact dimensions of 54mm in width and 80mm in length facilitate easy installation on a DIN rail, making it a practical choice for control panel applications.

Features & Benefits

• Type C circuit offers reliable tripping for inductive loads
• 10 kA breaking capacity protects against short circuits
• Toggle switch reset for easy manual operation
• Compact 54mm width saves valuable panel space
• Thermal-magnetic design ensures quick fault response
• Field-installable accessories enhance operational flexibility

Applications

• Ideal for business equipment and lighting circuits
• Suitable for supplementary protection in automation systems
• Utilised in control circuits for industrial systems
• Efficient for powering various electrical appliances

How does the toggle switch reset function improve usability?

The toggle switch reset allows for straightforward manual reactivation after a fault, ensuring minimal downtime and user-friendly operation.

What benefits come from the high breaking capacity?

A 10 kA breaking capacity provides robust protection against potentially damaging fault currents, safeguarding both the MCB and connected devices effectively.

In what scenarios is the Type C characteristic most beneficial?

The Type C characteristic is advantageous in applications with inductive loads, such as motors and transformers, ensuring reliable tripping with medium inrush currents.

How does the DIN rail mounting style contribute to installation?

The DIN rail mounting style allows for quick and efficient installation, ensuring secure positioning and facilitating easy replacements or inspections without complex procedures.

What factors should be considered when using the MCB in control circuits?

When integrating the MCB into control circuits, it is essential to account for the total load, circuit specifics, and environmental conditions to ensure optimal performance and safety.

Note

Eaton formerly known as Moeller

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Eaton
	Number of Poles	3
	Current Rating	40A
	Tripping Characteristics	Type C
	Rated AC Voltage	240 → 415V
	Breaking Capacity at Maximum Voltage Rating	10 kA
	Range	xEffect
	Circuit Breaker Type	MCB
	Width	85mm
	Length	54mm
	Mounting Style	DIN Rail Mount
	Depth	73mm

	Select all
	Brand Eaton
	Number of Poles 3
	Current Rating 40A
	Tripping Characteristics Type C
	Rated AC Voltage 240 → 415V
	Breaking Capacity at Maximum Voltage Rating 10 kA
	Range xEffect
	Circuit Breaker Type MCB
	Width 85mm
	Length 54mm
	Mounting Style DIN Rail Mount
	Depth 73mm

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