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Siemens 3SB3603-1HA20 Emergency Stop Button - 1NC Red

Siemens 3SB3603-1HA20 22mm Emergency Stop Button, 40mm, 1 NC, Red.

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ManufacturerSiemens

Part number3SB3603-1HA20

Actuator Type Emergency Stop Mushroom Pushbutton

Head Size 40mm

Operation Latching, Rotate-to-unlatch

Contact Configuration 1 NC

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12-month warranty

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Veteran-owned

CAGE: 9NK75

22mm metal round unit 40mm red mushroom head Latching operation Rotate-to-unlatch reset 'NOT-HALT' inscription 1 NC contact Screw terminals

Product description

The Siemens 3SB3603-1HA20 is a 22mm metal round emergency stop mushroom pushbutton. It features a 40mm red head, a latching mechanism, and a rotate-to-unlatch release. This unit includes one Normally Closed (NC) contact and a yellow backing plate with the inscription 'NOT-HALT'.

Designed for critical safety applications, this emergency stop button provides immediate shutdown capabilities. Its robust metal construction and IP67 rating ensure reliability in demanding industrial environments. The screw terminals offer a secure connection for electrical wiring.

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Technical specifications

Actuator Type	Emergency Stop Mushroom Pushbutton
Head Size	40mm
Operation	Latching, Rotate-to-unlatch
Contact Configuration	1 NC
Inscription	NOT-HALT
Terminal Type	Screw
Mounting Diameter	22mm
Enclosure Material	Metal
IP Rating	IP67

Common applications

Emergency stop circuits

Machine safety

Industrial control panels

Production lines

Safety interlocks

Compatible systems

Industrial control panels Safety circuits Machine safety systems PLC systems

Also known as

Siemens 3SB3603-1HA20-0CC0 Red Emergency Mushroom Button Siemens NOT-HALT Switch

Replaces / compatible with

This part is phased out. The preferred successor is the SIRIUS ACT 3SU1 series, specifically type 3SU1150-1HB20-1CH0. Always refer to manufacturer documentation for precise replacement compatibility.

Technical note

Expert tip

The 'NOT-HALT' inscription clearly indicates the function of this button, ensuring operators understand its critical safety role.

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Frequently asked questions

How is the Siemens 3SB3603-1HA20 emergency stop button reset?

The Siemens 3SB3603-1HA20 emergency stop button is reset by rotating the mushroom head. It features a latching mechanism that requires this specific action to disengage the safety circuit.