Siemens Emergency stop pushbutton, mushroom, 22mm, round, red Part number 3SU1150-1HB20-1PA0

Product Overview

The Siemens SIRIUS ACT Emergency-Stop Mushroom Pushbutton (SKU: 3SU1150-1HB20-1PA0) is a 22 mm diameter front-panel operator designed for safety applications. It features a metal red mushroom head (Ø 40 mm), positive-latching actuation with a rotate-to-unlatch reset mechanism according to EN ISO 13850, and is designed for demanding industrial conditions.

Key Features

• Metal round red mushroom actuator (Ø 40 mm)
• Positive-latching emergency-stop functionality
• Rotate-to-unlatch resetting mechanism
• Mounting hole diameter: 22.3 mm
• Contact configuration: 2 × NC contacts (two normally closed) for safety circuits
• Screw-terminal connections for secure wiring
• Front protection rating: IP66 / IP67 / IP69K when installed

Technical Specifications

• Product Series: SIRIUS ACT Emergency-Stop Pushbuttons
• Article Number: 3SU1150-1HB20-1PA0
• Mounting Hole Diameter: 22.3 mm
• Mushroom Head Diameter: 40 mm
• Contact Configuration: 2 × NC (two normally closed contacts)
• Rated Insulation Voltage (Ui): 500 V
• Operating Voltage Range: 5 … 500 V AC/DC
• Ambient Operating Temperature: –25 °C … +70 °C
• Mechanical Service Life (typical): 300,000 operations
• Protection Rating (Terminals): IP20
• Front Protection: IP66 / IP67 / IP69K
• Standard Compliance: EN ISO 13850 (Emergency-Stop)

Compliance & Certifications

• Complies with EN ISO 13850 for emergency-stop devices
• Meets IP66 / IP67 / IP69K front protection standards
• RoHS compliant and built to Siemens industrial quality standards

Applications

Designed for integration into machine-side control panels, safety circuits, and automated systems requiring immediate operator intervention and high protection against dust and water. Commonly used in manufacturing lines, packaging machinery, conveyor systems, and industrial environments where a clearly visible and reliable emergency stop control is required.