Siemens SIRIUS ACT Emergency Stop Pushbutton, 22mm, Red Mushroom, 1NC, Pull-to-Unlatch, Screw Terminal 3SU11001HB203CH0

The Siemens 3SU11001HB203CH0 is an emergency stop pushbutton from the SIRIUS ACT series, featuring a 40 mm red mushroom actuator designed for quick and reliable machine shutdown. Its pull-to-unlatch mechanism prevents accidental reset, while the modular design allows flexible integration into control panels.

Highlights

• 22 mm mounting diameter fits standard panel cut-outs
• Red mushroom head with 40 mm diameter for high visibility
• Pull-to-unlatch operation ensures deliberate reset
• 1 NC contact block with screw terminals
• Robust plastic front ring

In daily use

This emergency stop button is built for industrial environments where safety and reliability are critical. The large mushroom head is easy to strike in an emergency, and the pull-to-unlatch action requires a conscious effort to restart, reducing the risk of unintended operation. Its screw terminals provide secure wiring connections, and the modular design allows the contact block to be replaced or expanded as needed.

Full specifications

• Product type: Emergency stop pushbutton
• Series: SIRIUS ACT
• Mounting diameter: 22 mm
• Actuator type: Mushroom pushbutton
• Actuator colour: Red
• Mushroom head diameter: 40 mm
• Unlatching method: Pull-to-unlatch
• Contact configuration: 1 NC
• Terminal type: Screw terminal
• Housing material (front ring): Plastic
• Operating temperature range: -25 to +70 °C
• Rated insulation voltage: 500 V
• Rated impulse withstand voltage: 6 kV
• Mechanical durability: 100,000 operating cycles
• Electrical durability: 100,000 operating cycles

Final note

A dependable emergency stop solution for machine safety circuits, combining high visibility with robust construction.