3RH2911-1HA22 3RH Auxiliary switch 2NO+2NC 3RH/3RT, top mounted, screw terminal

The Siemens 3RH2911-1HA22 is a front-mount auxiliary contact block in the SIRIUS family designed to expand the control and signalling capabilities of industrial contactors and relays. It features two normally open (2NO) and two normally closed (2NC) instantaneous contacts with secure screw-clamp terminals, providing additional switching points for control circuits. This auxiliary switch block is suitable for mounting on the front of compatible 3RT2 and 3RH2 contactors and control relays, helping simplify wiring and improve status feedback in automation systems. Built for robust performance with an IP20 front rating and compliance with IEC/EN auxiliary contact standards, the 3RH2911-1HA22 supports reliable operation in machinery control panels and industrial electrical installations.