Siemens SIRIUS ACT 3SU1000-1HA20-0AA0 Emergency Stop Mushroom Pushbutton, Red, Plastic Front Ring, Pull-to-Release

The Siemens SIRIUS ACT emergency stop mushroom pushbutton is a high-performance safety component engineered for industrial control systems. Featuring a distinct red actuator and a durable plastic front ring, this device provides clear visual identification and reliable operation in demanding environments. The pull-to-release mechanism ensures that once activated, the system remains in a safe state until manually reset by an operator, preventing accidental restarts.

Advantages

This emergency stop button is built to withstand rigorous industrial use, offering high resistance to environmental factors and mechanical wear. Its modular design allows for seamless integration into existing control panels, simplifying both the assembly process and future maintenance. The ergonomic shape of the mushroom head ensures quick and intuitive activation during emergency situations, while the robust construction guarantees long-term operational reliability in various automation setups.

Suitable for

• Industrial machinery and production lines
• Control panels and operator consoles
• Safety-critical automation systems
• Emergency shutdown circuits in manufacturing plants

When it may not be suitable

This device is not intended for use in environments requiring specific hygienic standards, such as food processing or pharmaceutical cleanrooms, where stainless steel or specialized wash-down rated components are mandatory. It is also not suitable for applications where a turn-to-release mechanism is preferred over a pull-to-release function.

Key specifications

• Actuator type: Mushroom head
• Color: Red
• Front ring material: Plastic
• Reset method: Pull-to-release
• Series: SIRIUS ACT

How to use

Installation involves mounting the actuator into a standard panel cutout and securing it with the provided locking mechanism. Once installed, the device is ready for integration into the safety circuit. In an emergency, press the red mushroom head firmly to trigger the stop function. To reset the system, pull the mushroom head outward until it clicks back into the operational position, allowing the machine to be restarted safely.

What to consider before purchase

• Verify the panel cutout diameter requirements for your specific enclosure.
• Ensure the pull-to-release reset method aligns with your facility's safety protocols.
• Check compatibility with your existing SIRIUS ACT modular contact blocks.

Usage recommendations

Always perform a functional test of the emergency stop circuit after installation and during regular maintenance intervals to ensure the safety system remains fully operational.