Description
The Siemens 3SU1000-4HF21-0AA0 is an advanced SIRIUS ACT 2-position key switch head, offering secure and reliable operation with latching functionality. Designed for a standard 22mm cutout, this key switch head provides a robust solution for controlling access and activating/deactivating machinery in industrial settings. Its durable construction ensures longevity and consistent performance.
This Siemens key switch head is engineered to meet stringent safety and operational standards, providing a clear indication of the switch’s position. The latching mechanism ensures that the switch remains in its set position until intentionally changed, enhancing operational safety and preventing accidental activation. The Siemens 3SU1000-4HF21-0AA0 is a vital component for secured control systems.
Ideal for use in control panels, safety circuits, and access control systems, this key switch head offers a secure way to manage critical functions. Its 22mm mounting size makes it compatible with a wide range of standard enclosures and panels, simplifying integration into existing or new systems. The Siemens 3SU1000-4HF21-0AA0 is a versatile control element.
Choose the Siemens 3SU1000-4HF21-0AA0 for its advanced security features and industrial-grade reliability. This key switch head offers a dependable solution for managing access and controlling operations in demanding environments. Invest in this high-quality Siemens component for enhanced safety and control.







