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Siemens 3SB3603-0AA21 22mm Momentary Pushbutton - 1NC Red

Siemens 3SB3603-0AA21 22mm Momentary Flat Pushbutton, 1 NC, Red.

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ManufacturerSiemens

Part number3SB3603-0AA21

Actuator Type Momentary Pushbutton

Button Shape Flat

Button Color Red

Contact Configuration 1 NC

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22mm metal round unit Momentary action Flat red pushbutton actuator 1 NC contact High visibility red actuator Screw terminals

Product description

The Siemens 3SB3603-0AA21 is a 22mm metal round complete unit featuring a momentary contact pushbutton with a flat red actuator. This unit includes one Normally Closed (NC) contact and is designed for clear visual indication in control systems. The red plastic actuator provides high visibility.

This momentary pushbutton is ideal for applications such as start/stop functions, emergency stop interfaces (when used with appropriate circuitry), and general operator controls in industrial settings. Its durable metal housing and IP67 protection ensure reliable operation in harsh environments. The screw terminals provide a secure connection.

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Technical specifications

Actuator Type	Momentary Pushbutton
Button Shape	Flat
Button Color	Red
Contact Configuration	1 NC
Terminal Type	Screw
Mounting Diameter	22mm
Enclosure Material	Metal
IP Rating	IP67

Common applications

Machine control panels

Operator interfaces

Industrial automation

Emergency stop functions

Control stations

Compatible systems

Industrial control panels Automation systems Machine interfaces Control stations

Also known as

Siemens 3SB3603-0AA21-0CC0 Red Flat Push Button 3SB3603-0AA21 Momentary Red Pushbutton

Replaces / compatible with

This part is phased out. The preferred successor is the SIRIUS ACT 3SU1 series, specifically type 3SU1150-0AB20-1CA0. Consult manufacturer data for precise replacement guidance.

Technical note

Expert tip

The red color of the actuator ensures high visibility, crucial for operator recognition in safety-critical or high-traffic industrial environments.

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Frequently asked questions

What type of contact does the Siemens 3SB3603-0AA21 pushbutton have?

The Siemens 3SB3603-0AA21 pushbutton is equipped with one Normally Closed (NC) contact. It operates with a momentary action, meaning the contact returns to its default state when pressure is released.