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Siemens 3SB3801-2DF3 Enclosed Emergency Stop Pushbutton Assembly

Siemens 3SB3801-2DF3 Metal Enclosed Emergency Stop

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ManufacturerSiemens

Part number3SB3801-2DF3

Actuator Type Emergency Stop Mushroom Pushbutton

Head Diameter 40mm

Enclosure Material Metal

Enclosure Top Color Yellow

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CAGE: 9NK75

Durable Metal Enclosure 40mm Emergency Stop Mushroom Button Yellow Enclosure Top Protective Collar 1 NC Contact Rotate-to-unlatch Reset

Product description

The Siemens 3SB3801-2DF3 is a robust metal enclosed command device for 22mm round installations. It features a 40mm emergency stop mushroom pushbutton with a protective collar and a distinctive yellow plastic enclosure top. This unit is configured with one normally closed (NC) contact and utilizes screw terminals for secure electrical connections. The rotate-to-unlatch mechanism is standard for safe reset. This product is phased out, with SIRIUS ACT 3SU1 being the successor.

This assembly is designed for critical safety applications in demanding industrial environments such as manufacturing plants, machine tools, and automated systems where a durable metal enclosure and reliable emergency stop functionality are essential.

Stanlo Automation, a veteran-owned surplus parts distributor, is your trusted source for industrial automation components. We offer the Siemens 3SB3801-2DF3, providing a quality surplus solution to keep your equipment running efficiently and safely.

Technical specifications

Actuator Type	Emergency Stop Mushroom Pushbutton
Head Diameter	40mm
Enclosure Material	Metal
Enclosure Top Color	Yellow
Protective Collar	Yes
NC Contacts	1
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 Machinery

Safety Circuits

Compatible systems

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

Also known as

3SB38012DF3, Siemens Metal E-Stop, 22mm Yellow Button

Replaces / compatible with

This is a phased-out Siemens product. The preferred successor is the SIRIUS ACT 3SU1 series, specifically part number 3SU1851-0NA00-2AC2.

Technical note

Expert tip

The metal enclosure provides superior protection against physical impact and environmental factors compared to plastic alternatives, making it suitable for rugged industrial settings.

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Frequently asked questions

What type of reset mechanism does the Siemens 3SB3801-2DF3 use?

The Siemens 3SB3801-2DF3 uses a rotate-to-unlatch reset mechanism. To reset the emergency stop pushbutton after it has been activated, you need to rotate the mushroom head in the indicated direction.