ABB SMISSLINE TP S400M Miniature Circuit Breaker, 1-Pole, 50 A, Type B, Type C, Type D, Type K, 400 V AC, 250 V DC, 50

RS Stock No.:: 178-156
Mfr. Part No.:: 2CCS571001R0505 S401M-B50
Brand:: ABB

ABB SMISSLINE TP S400M Miniature Circuit Breaker, 1-Pole, 50 A, Type B, Type C, Type D, Type K, 400 V AC, 250 V DC, 50

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Subtotal (1 unit)*

£41.02

(exc. VAT)

£49.22

(inc. VAT)

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Shipping from 26 February 2026

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Units	Per unit
1 +	£41.02

*price indicative

RS Stock No.:: 178-156
Mfr. Part No.:: 2CCS571001R0505 S401M-B50
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	50 A
	Tripping Characteristics	Type B, Type C, Type D, Type K
	Rated AC Voltage	400 V
	Rated DC Voltage	250 V
	Breaking Capacity	50kA
	Mount Type	DIN Rail
	Range	SMISSLINE TP
	Series	S400M
	Depth	75mm
	Width	18 mm
	Standards/Approvals	EN 60898-1, IEC/EN 60947-2
	Reset Actuator Type	Toggle Switch

	Select all
	Brand ABB
	Product Type Miniature Circuit Breaker
	Number of Poles 1
	Current Rating 50 A
	Tripping Characteristics Type B, Type C, Type D, Type K
	Rated AC Voltage 400 V
	Rated DC Voltage 250 V
	Breaking Capacity 50kA
	Mount Type DIN Rail
	Range SMISSLINE TP
	Series S400M
	Depth 75mm
	Width 18 mm
	Standards/Approvals EN 60898-1, IEC/EN 60947-2
	Reset Actuator Type Toggle Switch

COO (Country of Origin):: CH

ABB S400M Series MCB, 1 Pole, 50A Current Rating - S401M-B50

This miniature circuit breaker (MCB) is designed to limit current, ensuring reliability and safety. The MCB operates at a current rating of 50A and features a compact design with dimensions of 91mm in length, 75mm in depth, and 18mm in width. Its ability to perform effectively under severe conditions makes it an essential component for electrical systems.

Features & Benefits

• Provides overload protection for enhanced safety

• Thermal and electromechanical tripping mechanisms

• Capable of breaking up to 10kA at maximum voltage

• DIN Rail mount simplifies installation and maintenance

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 the Smissline system?

Yes, it is specifically designed for the Smissline circuit breakers.

Will it function effectively in extreme temperatures?

It operates within a temperature range of -25°C to 60°C.

Can installation be done easily?

Yes, the DIN rail mounting style allows for straightforward installation.

Is it compliant with international standards?

Yes, it complies with IEC/EN 60898-1 standards.