What It Is and Where It Fits
The Siemens 3RH2911-2HA11-Z W96 is a front-mounted auxiliary switch block delivering one normally-open and one normally-closed contact pair (1 NO + 1 NC), terminated via spring-loaded (cage-clamp) terminals. It is designed to snap onto the front of Siemens 3RT2 contactors and 3RH2 contactor relays, adding status feedback or control logic without extra panel wiring. The spring-loaded terminal accepts solid or ferruled stranded conductors — strip length and wire gauge follow the standard 3RH2 accessory range, so no special tooling is needed beyond a screwdriver for the release button.
Sourcing and Lifecycle Reality
Note the product class designation: C — manufactured or produced to order, not a stocked shelf item. This means the part is built in multi-unit packaging (196 units per pack) and cannot be returned for credit once ordered. Plan your BOM quantity accordingly; a single-piece order may not be economical. RoHS compliance is confirmed since October 2009, and REACH Article 33 information is available on request. No export restrictions apply (AL: N / ECCN: N).
What the Ratings Mean for Fit
The 1 NO + 1 NC contact arrangement is the standard building block for auxiliary circuits — one set for the contactor's own holding circuit (typically the NO), the other for a remote status signal or interlock (the NC). The spring-loaded terminal ensures vibration-resistant connection in panel environments where screw terminals might loosen over time. Group Code R711 and Product Group 5344 are Siemens internal classification codes used for catalog sorting and cross-reference lookups. They confirm this part belongs to the 3RH2/3RT2 accessory family, not a different mounting scheme.