Siemens 3RH1921-1DA11-0KR0: 1 NO + 1 NC Auxiliary Switch Block
Siemens 3RH1921-1DA11-0KR0: 1 NO + 1 NC auxiliary switch block for motor contactors.
The Siemens 3RH1921-1DA11-0KR0 is a side-mounted auxiliary switch block designed for use with Siemens motor contactors. It features one normally open (NO) and one normally closed (NC) contact, adhering to EN 50012 standards. This unit utilizes screw terminals for secure connections and is compatible with contactor sizes S0 through S12. Please note, this is a phased-out product, with the SIRIUS 3RH2 series being its successor.
This auxiliary switch block is typically used to expand the control and signaling capabilities of motor starters. It can be employed in various industrial applications such as motor control panels, conveyor systems, pump controls, and general machine automation where additional contact states are required for interlocking, signaling, or diagnostics.
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| Type | Auxiliary Switch Block |
| Contacts | 1 NO + 1 NC |
| Mounting | Side |
| Terminal Type | Screw |
| Standards | EN 50012 |
| Contactor Size Compatibility | S0 to S12 |
| Series | SIRIUS 3RH19 |