3RH2921-2DA20 SIEMENS

The 3RH2921-2DA20 is a laterally mounted auxiliary switch block designed for use with Siemens 3RH contactors and 3RT spring-type terminal contactors. This auxiliary switch features a 2NO (normally open) contact configuration, providing reliable switching for control and signaling circuits. Specifically, it incorporates one NO contact on current path 33/34 and another on 43/44, designated for right-side mounting (R). Additionally, it includes one NO contact on current path 53/54 and another on 63/64, intended for left-side mounting (L). The spring-type terminals ensure quick, secure, and vibration-resistant connections, simplifying installation and maintenance. This auxiliary switch block enhances the functionality of the main contactor by providing additional contacts for interlocking, signaling, or other control functions. Its compact design allows for easy integration into existing control panels without significant space requirements. The 3RH2921-2DA20 auxiliary switch is crucial for creating comprehensive and reliable control systems. It adheres to Siemens' high-quality standards, ensuring long-term performance and dependability. This device is ideal for applications requiring additional switching capabilities alongside the main contactor.