ABB S400, SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 4 A, Type K, Type B, Type C, Type D, 400 V AC, 250 V DC, 10

RS Stock No.:: 176-352
Mfr. Part No.:: 2CCS571001R0044 S401M-C4
Brand:: ABB

ABB S400, SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 4 A, Type K, Type B, Type C, Type D, 400 V AC, 250 V DC, 10

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Subtotal (1 unit)*

£36.85

(exc. VAT)

£44.22

(inc. VAT)

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In Stock

Plus 11 unit(s) shipping from 09 February 2026

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Units	Per unit
1 +	£36.85

*price indicative

RS Stock No.:: 176-352
Mfr. Part No.:: 2CCS571001R0044 S401M-C4
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	1
	Product Type	Miniature Circuit Breaker
	Current Rating	4 A
	Tripping Characteristics	Type K, Type B, Type C, Type D
	Rated AC Voltage	400 V
	Rated DC Voltage	250 V
	Breaking Capacity	10kA
	Range	S400, SmiSSline
	Series	S400M
	Standards/Approvals	EN 60898-1, IEC/EN 60947-1, IEC/EN 60947-2
	Width	18 mm
	Depth	75mm
	Reset Actuator Type	Toggle Switch

	Select all
	Brand ABB
	Number of Poles 1
	Product Type Miniature Circuit Breaker
	Current Rating 4 A
	Tripping Characteristics Type K, Type B, Type C, Type D
	Rated AC Voltage 400 V
	Rated DC Voltage 250 V
	Breaking Capacity 10kA
	Range S400, SmiSSline
	Series S400M
	Standards/Approvals EN 60898-1, IEC/EN 60947-1, IEC/EN 60947-2
	Width 18 mm
	Depth 75mm
	Reset Actuator Type Toggle Switch

COO (Country of Origin):: CH

ABB S400M Series MCB, 1 Pole, 4A Current Rating - S401M-C4

This miniature circuit breaker (MCB) is designed for reliable protection in commercial and industrial applications. The 1-pole configuration provides effective overload and short circuit protection. With compact dimensions of 18mm in width, 91mm in length, and 75mm in depth, this DIN rail mount MCB integrates seamlessly into standard electrical installations.

Features & Benefits

• Thermal tripping mechanism provides overload protection

• Electromechanical mechanism safeguards against short circuits

• Rated breaking capacity of 10kA ensures high performance

• Compact design optimises space in electrical panels

Applications

• Utilised in electrical distribution systems

• Designed for safety in commercial premises

• Ideal for protection of industrial machinery

Can it handle both AC and DC voltage?

Yes, it accommodates rated AC voltage up to 400V and DC voltage up to 60V.

Will it provide automatic reset after a fault?

No, it requires a manual reset using the toggle switch.

Is it suitable for harsh environments?

Yes, it operates effectively between -25°C and 60°C.