Auxiliary switch electronically compliant to DIN EN 50012 on the side, spring-loaded connection, 1 NO + 1 NC, encapsulated, size S3 ... S12 2. Auxiliary switch block, auxiliary switch SIRIUS 3RH19 for extending the auxiliary contacts in the control circuit. This 3RH19 auxiliary switch can be mounted on the 3RT1 contactors of sizes S0-S12 without tools. The 3RH19/3RH29 auxiliary switch blocks are available as front or side-mountable versions, with up to four instantaneous switching or up to two leading switching NO and NC contacts. The auxiliary switches can be designed as positively guided contact elements in 3RH auxiliary contactors or as mirror contacts in 3RT power contactors. They are available with screw connection and spring-loaded connection. Simple, efficient, always up-to-date - the SIRIUS modular system.
| Property | Value |
| Number of contacts as normally open: | 1 |
| Number of contacts as normally closed: | 1 |
