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Siemens 3SU1150-1BA20-1CA0 22mm Red Mushroom Latching Pushbutton

Siemens 3SU1150-1BA20-1CA0 22mm red mushroom latching pushbutton, 1NC.

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ManufacturerSiemens
Part number3SU1150-1BA20-1CA0
Actuator Type Mushroom Pushbutton
Shape Round
Diameter 22 mm
Material Metal
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12-month warranty
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22mm standard mounting 40mm large mushroom head Latching operation Pull-to-unlatch release 1 NC contact Metal construction

The Siemens 3SU1150-1BA20-1CA0 is a 22mm round, metal mushroom pushbutton actuator with a shiny red finish and a 40mm diameter head. This actuator features a latching mechanism, meaning it stays in the pressed position until intentionally released by pulling the button. It is configured with 1 Normally Closed (NC) contact and uses screw terminals for connection.

This latching mushroom pushbutton is ideal for applications requiring a maintained state after actuation, such as emergency stops (though this specific model is not an E-stop), process holds, or safety interlocks. It is commonly used in manufacturing environments, machine tooling, and assembly lines where a physical latching action is needed.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Siemens 3SU1150-1BA20-1CA0, ensuring you receive reliable components at competitive prices. We are committed to helping you minimize downtime and keep your automation systems operational with quality surplus parts.

Actuator TypeMushroom Pushbutton
ShapeRound
Diameter22 mm
MaterialMetal
FinishShiny
ColorRed
Head Diameter40 mm
Contact TypeLatching
Release MechanismPull-to-unlatch
Number of Contacts1 NC
Terminal TypeScrew Terminal
SeriesSIRIUS 3SU1
Machine safety interlocks
Process hold functions
Control stations
HMI panels
Industrial machinery
Emergency stop (non-certified applications)
Compatible with Siemens SIRIUS 3SU1 series mounting bases and accessories.
Siemens Red Mushroom Button 3SU1150 Latching Red 40mm mushroom pushbutton Metal latching actuator
This part is a standard component and typically replaces older versions or similar 22mm latching mushroom pushbuttons from Siemens or other manufacturers. Always verify specifications for direct replacement suitability.
Expert tip
The 40mm mushroom head provides a large, easily accessible target for manual operation, especially in emergency situations or when quick deactivation is required.
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How does the pull-to-unlatch mechanism work on the Siemens 3SU1150-1BA20-1CA0?
The pull-to-unlatch mechanism means that once the mushroom button is pressed and latches in place, it must be physically pulled outwards to reset it to its original position. This model includes one normally closed (NC) contact.