The Siemens SIRIUS DIN Rail Auxiliary Relay 3RH1921-1CA01 has screw connections and is ideal as a contactor relay or power contactor. The relay has 1 NC contact and can be fitted onto the front side of the contactor size S0 to S12. * Contact type: 1 NC * Size: For fitting on to front side S0 - SS3 * Protection class: IP20 * Operating temperature: -25°C to 60°C * Rated voltage: 690V * Mounting: Snap on * Dimensions: 10(W) x 38(H) x 51(D)mm * Connections: Screw type * Type: Auxiliary Switch, EN 50005 * Manufacturer's part: Siemens 3RH1921-1CA01 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-01-20 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-04-01 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-05-17 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-06-23 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-08-01 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-08-22 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-10-24 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2025-12-06 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2026-03-10 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2026-04-03 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2026-04-26 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2026-06-10 https://elecena.pl/product/27724728/siemens-3rh1921-1ca01-auxiliary-switch-block-din-en-50005-1-pole 2026-07-03