RS Better World

Siemens SIRIUS ACT 3SU18 Series Twist Release Emergency Stop Push Button, Panel Mount, 22 mm Cutout, 2 NC, IP69K, IP69,

RS Stock No.:: 173-6855
Distrelec Article No.:: 302-15-399
Mfr. Part No.:: 3SU1851-0NB00-2AA2
Brand:: Siemens

Siemens SIRIUS ACT 3SU18 Series Twist Release Emergency Stop Push Button, Panel Mount, 22 mm Cutout, 2 NC, IP69K, IP69,

Subtotal (1 unit)*

£90.74

(exc. VAT)

£108.89

(inc. VAT)

FREE delivery for orders over £60.00

In Stock

1 unit(s) ready to ship
Plus 1 unit(s) ready to ship from another location
Plus 10 unit(s) shipping from 07 May 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	£90.74

*price indicative

Better World

Our Better World range features products that make it easy for you to make a greener product choice you can trust. Click here to find out more.

RS Stock No.:: 173-6855
Distrelec Article No.:: 302-15-399
Mfr. Part No.:: 3SU1851-0NB00-2AA2
Brand:: Siemens

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Siemens
	Mount Type	Panel Mount
	Product Type	Emergency Stop Push Button
	Cutout Diameter	22mm
	Contact Configuration	2 NC
	Housing Material	Metal
	Push Button Actuation	Twist Release
	Illuminated	No
	Series	SIRIUS ACT 3SU18
	IP Rating	IP69K, IP69, IP67, IP66
	Colour	Red, Yellow
	Terminal Type	Screw
	Number of Auxiliary Contacts	2
	Contact AC Voltage	500V ac
	Contact Current	10A
	Contact DC Voltage	500V dc
	Head Style	Mushroom
	Switch Configuration	2 NC
	Depth	109mm
	Standards/Approvals	ISO 13850, IEC 81346-2, IEC 60068-2-27, IEC 60068-2-6, IEC 60721
	Head Diameter	40mm
	Hazardous Area Certification	NO
	Length	85mm
	Width	85mm
	Better World Claim	Extended Product Life, Low Carbon Manufacture
	Better World Product	Yes
	Push Button Material	Plastic

	Select all
	Brand Siemens
	Mount Type Panel Mount
	Product Type Emergency Stop Push Button
	Cutout Diameter 22mm
	Contact Configuration 2 NC
	Housing Material Metal
	Push Button Actuation Twist Release
	Illuminated No
	Series SIRIUS ACT 3SU18
	IP Rating IP69K, IP69, IP67, IP66
	Colour Red, Yellow
	Terminal Type Screw
	Number of Auxiliary Contacts 2
	Contact AC Voltage 500V ac
	Contact Current 10A
	Contact DC Voltage 500V dc
	Head Style Mushroom
	Switch Configuration 2 NC
	Depth 109mm
	Standards/Approvals ISO 13850, IEC 81346-2, IEC 60068-2-27, IEC 60068-2-6, IEC 60721
	Head Diameter 40mm
	Hazardous Area Certification NO
	Length 85mm
	Width 85mm
	Better World Claim Extended Product Life, Low Carbon Manufacture
	Better World Product Yes
	Push Button Material Plastic

Siemens SIRIUS ACT 3SU18 Series Emergency Stop Push Button, 22mm Cutout Diameter, 2NC Contact Configuration - 3SU1851-0NB00-2AA2

This emergency stop push button is intended for critical industrial safety applications, providing immediate shutdown capabilities in machinery and processes. Its robust design and user-friendly twist release mechanism make it a suitable choice for automation, electronics, and mechanical industries, focusing on safety in high-pressure environments.

Features & Benefits

• Floor mounting design facilitates installation for various setups

• IP66, IP67, and IP69 ratings offer exceptional environmental protection

• Twist release actuation enables swift user response in emergencies

• Red and yellow colour options improve visibility and safety awareness

• Voltage rating spans 5V to 500V for versatile usage

Applications

• Facilitates emergency shutdowns in manufacturing machinery

• Ideal for electrical control panels and machine safety systems

• Commonly found in environments with high dust and moisture exposure

• Integrated into safety circuits for industrial and commercial equipment

How is installation carried out for this emergency stop push button?

It can be easily mounted on the floor to adapt to various machinery setups.

What voltage range is compatible with this push button?

It supports a range from 5V to 500V, accommodating different electrical systems.

How does the twist release feature enhance safety?

It allows for immediate action in emergencies, restoring normal operation swiftly.