Siemens 3RH1911-2HA22 4-Pole Auxiliary Switch Block
Siemens 3RH1911-2HA22 4-pole auxiliary switch block for motor contactors.
The Siemens 3RH1911-2HA22 is a 4-pole auxiliary switch block designed for Siemens motor contactors, featuring spring-type terminals and a contact configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, compliant with EN 50012. This is a phased-out product, with the SIRIUS 3RH2 series, specifically the 3RH2911-2HA22, being its preferred successor.
This auxiliary switch block is used to add essential auxiliary functions to motor contactors, such as status monitoring, interlocking, and control circuits. It is widely implemented in motor control panels, industrial machinery, and automation systems where reliable motor protection and control are required.
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| Poles | 4 |
| Contacts | 2 NO + 2 NC |
| Terminal Type | Spring-type |
| Standard | EN 50012 |
| Application | Motor Contactors |