Electronic auxiliary switch block on the front, 2 NO, current path 1 NO, 1 NO, for auxiliary and motor contactors, 3RT2, spring-loaded connection, .3/.4, --/-- , --/-- , .3/.4 SIRIUS 3RH29 auxiliary switch for extending the auxiliary contacts in the control circuit. The 3RH29 front auxiliary switches can be mounted on the 3RT2 contactors and 3RH2 auxiliary contactors without tools, regardless of size. 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 make and break contacts. The auxiliary switches can be designed as positively guided contact elements in 3RH contactor relays or as mirror contacts in 3RT contactors. They are available with screw connections and spring-loaded connections. Simple, efficient, always up-to-date - the SIRIUS modular system.
| Property | Value |
| Number of contacts as normally open: | 2 |
