ABB SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 40 A, Type B, Type C, Type D, Type K, 400 V ac AC, 250 V dc DC,

RS Stock No.:: 178-162
Mfr. Part No.:: 2CCS571001R0405 S401M-B40
Brand:: ABB

ABB SmiSSline S400M Miniature Circuit Breaker, 1-Pole, 40 A, Type B, Type C, Type D, Type K, 400 V ac AC, 250 V dc DC,

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Subtotal (1 unit)*

$83.09

(exc. GST)

$91.40

(inc. GST)

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Shipping from 05 March 2026

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Units	Per unit
1 - 9	$83.09
10 - 49	$80.20
50 +	$76.45

*price indicative

RS Stock No.:: 178-162
Mfr. Part No.:: 2CCS571001R0405 S401M-B40
Brand:: ABB

Specifications

Technical data sheets

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	40 A
	Tripping Characteristics	Type B, Type C, Type D, Type K
	Rated AC Voltage	400 V ac
	Rated DC Voltage	250 V dc
	Breaking Capacity	10kA
	Mount Type	DIN Rail
	Range	SmiSSline
	Series	S400M
	Width	18 mm
	Depth	75mm
	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 40 A
	Tripping Characteristics Type B, Type C, Type D, Type K
	Rated AC Voltage 400 V ac
	Rated DC Voltage 250 V dc
	Breaking Capacity 10kA
	Mount Type DIN Rail
	Range SmiSSline
	Series S400M
	Width 18 mm
	Depth 75mm
	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, 40A Current Rating - S401M-B40

This miniature circuit breaker (MCB) provides overload and short circuit protection for electrical distributions. It is designed in a compact form factor with dimensions of 18mm width, 91mm length, and 75mm depth, offering a dependable solution for various applications. The MCB has a current rating of 40A and is suitable for both 230V and 400V AC systems, making it an appropriate component for professionals in the automation, electronics, and electrical industries.

Features & Benefits

• 10kA breaking capacity accommodates high fault currents

• Overload protection prevents circuit damage from excess current

• Thermal tripping mechanism enhances operational safety

• Screw terminal design ensures secure electrical connections

Applications

• Used in industrial control panels to protect circuits for high-power equipment such as large motors and generators

• Employed in lighting control panels to safeguard circuits driving high-intensity lamps and extensive LED arrays

• Utilised in distribution boards for commercial and large residential installations to provide reliable circuit protection

Can it handle high voltage ratings?

Yes, it can operate at rated AC voltages of 230V and 400V.

Will it protect against overload situations?

Yes, it features thermal tripping for overload protection.

Is it easy to install in existing systems?

Yes, it is designed for simple DIN rail mounting.