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Siemens 3SB3801-2EF3 Enclosed Emergency Stop Pushbutton Assembly

Siemens 3SB3801-2EF3 Metal Enclosed Emergency Stop

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ManufacturerSiemens

Part number3SB3801-2EF3

Actuator Type Emergency Stop Mushroom Pushbutton

Head Diameter 40mm

Enclosure Material Metal

Enclosure Top Color Yellow

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Durable Metal Enclosure 40mm Emergency Stop Mushroom Button Yellow Enclosure Top Protective Collar Dual Normally Closed (NC) Contacts Rotate-to-unlatch Reset

Product description

The Siemens 3SB3801-2EF3 is a metal enclosed command device designed for 22mm round installations, featuring a 40mm emergency stop mushroom pushbutton with a protective collar and a yellow plastic enclosure top. This unit is equipped with two normally closed (NC) contacts for enhanced safety redundancy and uses screw terminals for reliable connections. The rotate-to-unlatch mechanism ensures a clear manual reset. This product is phased out, with SIRIUS ACT 3SU1 being the successor.

This robust assembly is crucial for safety-critical applications in manufacturing, automotive production, and heavy industry, where reliable emergency shutdown and a durable metal enclosure are necessary. The dual NC contacts offer an additional layer of safety assurance.

Stanlo Automation, a veteran-owned surplus parts distributor, is your premier source for industrial automation components. We offer the Siemens 3SB3801-2EF3, providing a dependable surplus solution to maintain your systems and minimize operational downtime.

Technical specifications

Actuator Type	Emergency Stop Mushroom Pushbutton
Head Diameter	40mm
Enclosure Material	Metal
Enclosure Top Color	Yellow
Protective Collar	Yes
NC Contacts	2
Reset Mechanism	Rotate-to-unlatch
Terminal Type	Screw Terminal
Mounting Type	Floor Mounting
Cable Entry	2 x M20 (Top/Bottom)

Common applications

Machine Safety

Emergency Shutdown

Industrial Control Panels

Manufacturing Automation

Heavy Industry

Safety Circuits

Compatible systems

Industrial control panels and machinery requiring 22mm momentary pushbuttons with dual NC contacts and emergency stop functionality within a metal housing.

Also known as

3SB38012EF3, Siemens Metal Dual NC E-Stop, 22mm Yellow Metal Button

Replaces / compatible with

This is a phased-out Siemens product. The preferred successor is the SIRIUS ACT 3SU1 series, specifically part number 3SU1851-0NB00-2AC2.

Technical note

Expert tip

The protective collar surrounding the 40mm mushroom head not only aids in preventing accidental activation but also offers a degree of impact protection to the button itself.

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Frequently asked questions

What are the benefits of the dual NC contacts in the Siemens 3SB3801-2EF3?

The dual NC contacts in the Siemens 3SB3801-2EF3 provide redundancy for safety circuits. This means that if one contact fails, the other can still ensure the emergency stop function is activated, enhancing overall machine safety.