Red mushroom button 2 NC 1 NO nickel-plated ring ST22-DC-21. ST22-DC-21\.

Mushroom button – a reliable safety and control element

This red mushroom button, designated ST22-DC-21, is a key component in control and safety systems. Designed for mounting in 22 mm diameter holes, it provides solid and intuitive operation. The construction with a red mushroom and a nickel-plated front ring guarantees good visibility and durability, even in demanding industrial conditions.

Construction and application

This button is characterized by a screw connection, which facilitates its integration with the existing electrical installation. Its construction based on a self-returning mechanism (with a function to return to the initial position after release) makes it ideal for applications requiring immediate response. The use of plastic in the front ring provides additional protection against mechanical damage. Thanks to the IP65 protection class, the button is resistant to dust and water ingress, making it suitable for operation in harsh environmental conditions.

Key features and benefits

• Contact configuration: It has 2 normally closed (NC) contacts and 1 normally open (NO) contact, allowing for flexible use in various control circuits.
• Strength and durability: Made of high-quality materials, resistant to mechanical damage and external factors.
• Safety: The red color of the mushroom and the clear construction ensure quick identification in emergency situations.
• Easy installation: Standard hole diameter (22 mm) and screw connection facilitate installation and replacement.
• Protection against weather conditions: IP65 protection class guarantees reliable operation even in wet or dusty environments.
• Versatility: Suitable for a wide range of applications – from simple control circuits to advanced safety systems.
• Clear identification: Nickel-plated front ring increases readability and mounting aesthetics.

This button is not only a control element, but above all a guarantee of safety and reliability in every system in which it is installed. Its solid construction and high quality of workmanship translate into long-term and trouble-free operation.