
Siemens 3SK1121-1CB41
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The Siemens 3SK1121-1CB41 is a SIRIUS safety relay basic unit from the Advanced series, developed for reliable safety switching in industrial control panels and machine safety applications. This 24 V DC safety relay is equipped with 2 instantaneous NO enabling contacts and 2 delayed NO enabling contacts, with an adjustable time delay of 0.05 to 3 s. It is a practical solution for safety circuits where controlled restart or delayed switching is required.
With screw terminals for secure wiring and the proven quality of Siemens SIRIUS components, this safety relay supports efficient panel building and dependable operation in demanding electrical environments.
For OEMs, machine builders and maintenance professionals, the 3SK1121-1CB41 offers a compact and professional choice for safety relay technology, industrial automation and control cabinet integration.