ABB S400, SmiSSline S400M Miniature Circuit Breaker, 3-Pole, 4 A, Type D, Type B, Type C, Type K, 400 V AC, 250 V DC, 10

RS Stock No.:: 178-140
Mfr. Part No.:: 2CCS573001R0045 - S403MB40
Brand:: ABB

ABB S400, SmiSSline S400M Miniature Circuit Breaker, 3-Pole, 4 A, Type D, Type B, Type C, Type K, 400 V AC, 250 V DC, 10

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Subtotal (1 unit)*

£133.44

(exc. VAT)

£160.13

(inc. VAT)

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Shipping from 26 February 2026

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Units	Per unit
1 +	£133.44

*price indicative

RS Stock No.:: 178-140
Mfr. Part No.:: 2CCS573001R0045 - S403MB40
Brand:: ABB

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	ABB
	Number of Poles	3
	Product Type	Miniature Circuit Breaker
	Current Rating	4 A
	Tripping Characteristics	Type D, Type B, Type C, Type K
	Rated AC Voltage	400 V
	Rated DC Voltage	250 V
	Mount Type	DIN Rail
	Breaking Capacity	10kA
	Range	S400, SmiSSline
	Series	S400M
	Standards/Approvals	EN 60898-1, IEC/EN 60947-2
	Depth	75mm
	Width	54 mm
	Reset Actuator Type	Toggle Switch

	Select all
	Brand ABB
	Number of Poles 3
	Product Type Miniature Circuit Breaker
	Current Rating 4 A
	Tripping Characteristics Type D, Type B, Type C, Type K
	Rated AC Voltage 400 V
	Rated DC Voltage 250 V
	Mount Type DIN Rail
	Breaking Capacity 10kA
	Range S400, SmiSSline
	Series S400M
	Standards/Approvals EN 60898-1, IEC/EN 60947-2
	Depth 75mm
	Width 54 mm
	Reset Actuator Type Toggle Switch

COO (Country of Origin):: CH

ABB S400M Series MCB, 3 Poles, 4A Current Rating - 2CCS573001R0045 - S403MB40

This miniature circuit breaker (MCB) is designed to provide electrical protection. It features a compact design, suitable for DIN rail mounting. With a rated current of 4A and a breaking capacity of 10kA, this device ensures effective interruption and protection in various applications, accommodating standard voltages of both 230V and 400V.

Features & Benefits

• 10kA breaking capacity ensures effective short-circuit protection

• Thermal tripping mechanism supports overload prevention

• Electromechanical tripping enhances operational reliability

• Compact DIN rail mount design simplifies installation

• Compact design for space saving in electrical installations

Applications

• Utilised in domestic distribution boards for safety

• Ideal for industrial control panels and systems

• Suitable for use with lighting circuits and appliances

Can it be installed with standard DIN rails?

Yes, this MCB is designed for easy DIN rail installation.

How does the thermal element provide overload protection?

The thermal element heats up with excess current, activating the breaker to protect the circuit from overloads.