{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1NE22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1NE22","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1NE22","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1NE22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, front-mount for 3RT2/3RH2, 2 NO + 2 NC, solid-state compatible, screw terminals, IP20.","salesMarkdown":"The Siemens 3RH2911-1NE22 is a SIRIUS auxiliary switch block designed to snap onto the front of 3RT2 contactors and 3RH2 contactor relays. It provides 2 normally-open and 2 normally-closed instantaneous contacts, with two of those contacts (1 NO and 1 NC) rated as solid-state compatible — meaning they handle the low-voltage, low-current switching typical of PLC inputs and electronic modules without the contact oxidation that standard auxiliary contacts can develop in that range. The other two contacts (1 NO, 1 NC) are standard auxiliary contacts for general signal feedback. This block fits contactor frame sizes S00, S0, S2, and S3, which covers the full SIRIUS range from the smallest 3RT2 contactors up to the larger 3RT2 power contactors. The screw-type terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid/stranded wire, or 2x (20...16) / 2x (18...14) AWG. The front-mount design adds 43.7 mm depth, 36 mm width, and 37.5 mm height to the contactor assembly. Snap-on front mounting means no DIN rail space is consumed — the switch clips directly onto the contactor's front face. This is the typical arrangement for adding auxiliary contacts to a contactor that already occupies a DIN-rail position. The IP20 protection rating on the front means the terminals are finger-safe once wired, suitable for enclosed panel environments. The insulation voltage is rated 690 V AC at pollution degree 3, with a 6 kV surge voltage withstand — consistent with the contactor's own insulation coordination. Compared to the 3RH2122-1BA40 — a DIN-rail-mounted auxiliary contactor rather than a front-mount switch block — the 3RH2911-1NE22 is a more compact, contactor-specific add-on. The 3RH2122-1BA40 measures 73 mm deep x 45 mm wide, requires its own DIN rail slot, and carries 10 A rated operational current at AC-12. The 3RH2911-1NE22 clips onto the contactor's front, adding only 43.7 mm depth and 36 mm width, and its contacts are rated for the signal-level switching that electronic controls demand. For a panel already using 3RT2 contactors, the front-mount block saves one DIN-rail position per contactor. If you are replacing a 3RH2122-1BA40 in an existing panel, the 3RH2911-1NE22 will not drop in directly — it requires the contactor's front-mount interface and rewiring to the contactor's coil terminals. The mirror contact feature per IEC 60947-4-1 (applicable when used with 3RT2.2/3/4 contactors) means the NC contacts are mechanically linked to the NO contacts so that an NC mirror contact cannot close if the NO main contacts are welded. This is a safety requirement in applications where the auxiliary contact provides feedback to a safety circuit about the contactor's state. Contact reliability is specified as one incorrect switching operation per 100 million switching operations at 5 V, 1 mA — important for direct PLC input sensing without an interposing relay.","metaTitle":"Siemens 3RH2911-1NE22 SIRIUS Auxiliary Switch, 2NO+2NC, Scre","metaDescription":"Siemens 3RH2911-1NE22 SIRIUS auxiliary switch, front-mount for 3RT2/3RH2 contactors. 2 NO + 2 NC with solid-state compatible contacts, screw terminals. IP20, 690V insulation. Activ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1NE22","Height":"37.5 mm","at 24 V":"0.3 A","at 48 V":"0.3 A","at 60 V":"0.3 A","description":"auxiliary switch, solid-state compatible, on the front, 2 NO + 2 NC,.3/.4,.3/.4,.1/.2,.1/.2, current path: 1 NO (solid-state compatible), 1 NO, 1 NC, 1 NC (solid-state compatible), screw terminal, for contactors 3RT2 and contactor relays 3RH2","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Category":"Auxiliary switch","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","Suitability For Use":"Contactor relay and power contactor","Design Of The Product":"for snapping onto the front","Instantaneous Contact":"2","Substance Prohibitance (Date)":"10/01/2009","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"one incorrect switching operation of 100 million switching operations (5 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT2.2/3/4","Mechanical Service Life (Operating Cycles) Typical":"5 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$22.86","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/411a90398ff97005f1bbd219294a438f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=773609&mlfb=3RH2911-1NE22"},"ai":{"faq":[{"question":"What is the difference between the 3RH2911-1NE22 and the 3RH2122-1BA40?","answer":"The 3RH2911-1NE22 is a front-mount auxiliary switch block that clips onto 3RT2/3RH2 contactors, adding 43.7 mm depth and 36 mm width. The 3RH2122-1BA40 is a standalone DIN-rail auxiliary contactor measuring 73 mm deep x 45 mm wide, requiring its own rail slot. The 3RH2911-1NE22 has two solid-state-compatible contacts for low-level switching; the 3RH2122-1BA40 is rated 10 A at AC-12. They are not direct drop-in replacements — the 3RH2911-1NE22 needs the contactor's front-mount interface."},{"question":"What compliance documentation is available for 3RH2911-1NE22?","answer":"The part carries RoHS compliance with a substance prohibition date of October 1, 2009, and is manufactured under IEC 60947-4-1 for mirror contact requirements. Standard Siemens documentation includes the declaration of conformity, CE marking, and the product datasheet. No specific UL or CSA listing is stated in the available specifications."},{"question":"Where can I buy 3RH2911-1NE22 and get current pricing?","answer":"The 3RH2911-1NE22 is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — lead times and stock levels are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1NE22","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RH2911-1NE22 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}