Siemens 3SU1 Series Twist Release Emergency Stop Push Button, Surface Mount, 1NC

The SIRIUS ACT range of push buttons and signalling devices presents an expertly designed selection of push buttons, pilot lights and switches that are intelligent, reliable and physically robust. An innovative Snap-on concept makes the task of installing a unit so effortless that it can be done with one hand.

Made with real metals and high-grade plastics, installed with smart functions and interaction abilities, these state-of-the-art push buttons, indicator lights and switches have been extreme element tested to guarantee a long usage life and reliability for all your operations.
These devices are suitable for use in any climate according to EN ISO 6270-2 and are designed for standards industrial applications.
The SIRIUS ACT 3SU1 pushbuttons and signalling devices due to their resistant material polyamide as standard gives them improved resistance to oils and detergents.
These units can be recycled thanks to their low pollutant content.
The range has a number of certifications and approvals in particular:
•Communautés Européennes (The CE approval mark is required in order to market your products within Europe. The CE mark indicates to European authorities that your claims of product compliance meet the applicable standards.)
•Underwriters Laboratories Inc. (Product safety certification organization)
•Underwriters Laboratories Inc. (Product safety certification organization)
•UL Recognized Component Mark (Approval mark for recognized components)
•Canadian Standards Association
•China Compulsory Certification
•Association of German Electrical Engineers
This range of push buttons can be used in the following industries:
•Food and Beverage Industry
•Pharmaceutical Industry
•Rail and Transport Industry
•Automotive Industry
•Mining and Quarrying Industry
•Factory Automation Industry

IEC 60947-1, EN 60947-1
IEC 60947-5-1, EN 60947-5-1

The mounting type of the enclosure of this 3SU1851-0NA00-2AA2 can be vertically only.
This is a typical emergency off/stop function device with the operating voltage of AC (alternating current)/DC (direct current) electricity.
The electrical connection on enclosure should follow cable routing above and below, both 1 x M20.
The ambient temperature during operation ranging from -25°C to +70°C, during storage however ranging from -40°C to +80°C.
The Emergency Stop Mushroom Pushbuttons represents worldwide standards, in particular:
•IP66 where a device can withstand high-pressure water jets and is suitable for tough outdoor use
•IP67 where a device can withstand immersion in one meter of water for 30 minutes
•IP69K where a device can withstand both rough treatment and intensive, high-temperature cleaning. They are ideal for environments with high sanitary requirements, such as the food and beverage industry.

What is the different between a push button switch for an emergency stop and a general-purpose push button switch?