Deliver to
United Kingdom
The Siemens SIRIUS ACT 3SU1050 4BF11 0AA0 is a robust, 22 mm metal, shiny-finish key-operated selector switch head designed for industrial control and access systems. Featuring a 2-position (O–I) latching mechanism and supplied with two SB30 lock keys, it’s engineered for secure operator control. Its durable Ronis lock system, rugged stainless grade metal construction, and high ingress protection ratings (up to IP69K) make it ideal for harsh environments and critical applications.
If you're specifying a reliable key switch for machinery, control panels, or access systems, this Siemens SIRIUS ACT unit stands out for its combination of security, durability, and ease of installation. It allows only authorised personnel to operate critical switches, reducing misuse or accidental activation. Its premium metal finish and exceptional ingress protection make it suitable for industrial zones, outdoor applications, and environments exposed to wash down or contamination. Offering a reputable Siemens build and long service life (rated for ~300,000 actuations), it delivers investment protection and peace of mind.
For more information please check the datasheets.
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