ABB SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 63 A, Type B, Type C, Type D, Type K, 400 V AC, 250 V DC, 10 kA

RS Stock No.:: 178-077
Mfr. Part No.:: 2CCS571001R0635 S401MB63
Brand:: ABB

ABB SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 63 A, Type B, Type C, Type D, Type K, 400 V AC, 250 V DC, 10 kA

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Subtotal (1 unit)*

£46.87

(exc. VAT)

£56.24

(inc. VAT)

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Shipping from 26 February 2026

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Units	Per unit
1 +	£46.87

*price indicative

RS Stock No.:: 178-077
Mfr. Part No.:: 2CCS571001R0635 S401MB63
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
	Product Type	Miniature Circuit Breaker
	Number of Poles	1
	Current Rating	63 A
	Tripping Characteristics	Type B, Type C, Type D, Type K
	Rated AC Voltage	400 V
	Rated DC Voltage	250 V
	Breaking Capacity	10kA
	Range	SmiSSline
	Series	S400M
	Depth	75mm
	Standards/Approvals	EN 60898-1, IEC/EN 60947-2
	Width	18 mm
	Reset Actuator Type	Toggle Switch

	Select all
	Brand ABB
	Product Type Miniature Circuit Breaker
	Number of Poles 1
	Current Rating 63 A
	Tripping Characteristics Type B, Type C, Type D, Type K
	Rated AC Voltage 400 V
	Rated DC Voltage 250 V
	Breaking Capacity 10kA
	Range SmiSSline
	Series S400M
	Depth 75mm
	Standards/Approvals EN 60898-1, IEC/EN 60947-2
	Width 18 mm
	Reset Actuator Type Toggle Switch

COO (Country of Origin):: CH

ABB S400M Series MCB, 1 Pole, 63A Current Rating - S401MB63

This is a compact miniature circuit breaker (MCB) designed for efficient overload protection in commercial and industrial settings. With a width of 18mm and a length of 91mm, it can be easily mounted on standard DIN rails, ensuring straightforward installation. The current rating of 63A and a breaking capacity of 10kA make it suitable for various applications within electrical distribution systems.

Features & Benefits

• Type B MCB ensures effective overload protection

• Thermal tripping mechanism for enhanced safety

• Screw terminal design simplifies wiring connections

• Compact DIN rail MCB optimises installation space

Applications

• Utilised in industrial control panels to safeguard circuits for high-power equipment such as motors and compressors

• Used in lighting control panels to ensure protection for circuits driving high-intensity lamps and LED fixtures

Is it compatible with existing DIN rail installations?

Yes, it is designed for seamless DIN rail compatibility.

Can it be reset manually after tripping?

Yes, it features a toggle switch for manual reset.