{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2NN22-0MC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2NN22-0MC0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2NN22-0MC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NN22-0MC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, solid-state compatible, 2 NO + 2 NC, spring-loaded terminals, snap-on mounting, 47.7 mm depth, 36 mm width, IP20.","salesMarkdown":"This Siemens SIRIUS 3RH2911-2NN22-0MC0 is a front-mounted auxiliary switch block built for contactor relays and power contactors. It gives you 2 NO plus 2 NC contacts, with two of those NO contacts rated as solid-state compatible — meaning they handle the low-voltage, low-current switching that PLC outputs and solid-state relays need without the contact reliability issues you get with standard silver contacts. The contact reliability spec backs that up: one incorrect switching operation per 100 million operations at 5 V and 1 mA. ## Snap-on fit and spring terminals It snaps onto the front of specific 3RT102 and 3RT103 contactor sizes using the listed adapter kits — 3RT2926-4NA00 for the 3RT102 frame, 3RT2936-4NA00 for the 3RT103 frame. Width is 36 mm, depth 47.7 mm, so it adds minimal real estate to the contactor face. Spring-loaded terminals accept 2x (0.5 to 2.5 mm²) stranded without ferrules, or 2x (0.5 to 1.5 mm²) with core-end processing. AWG range is 2x (20 to 14). That spring cage saves panel-build time versus screw terminals — no torquing, no re-torquing on commissioning. ## Ratings for a real panel Mechanical service life is 5 million switching cycles, typical for an auxiliary block that isn't carrying main motor current. Front protection is IP20 — finger-safe, but keep it inside the enclosure.","metaTitle":"Siemens 3RH2911-2NN22-0MC0 Auxiliary Switch, Solid-State Com","metaDescription":"Siemens 3RH2911-2NN22-0MC0 auxiliary switch block, solid-state compatible, 2 NO + 2 NC contacts, spring-loaded terminals, snap-on mount, 47.7 mm depth, IP20. Current production. Qu","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","Height":"41.5 mm","at 24 V":"0.3 A","at 60 V":"0.3 A","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Suitability For Use":"Contactor relay and power contactor","Instantaneous Contact":"2","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 2.5 mm²)","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Contact Reliability Of Auxiliary Contacts":"one incorrect switching operation of 100 million switching operations (5 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"5 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/957e436e97c28c45fc14c6fc0c0a81bf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458578&mlfb=3RH2911-2NN22-0MC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NN22-0MC0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RH2911-2NN22-0MC0?","answer":"The depth is 47.7 mm."},{"question":"What is the width of 3RH2911-2NN22-0MC0?","answer":"The width is 36 mm."},{"question":"Will 3RH2911-2NN22-0MC0 drop into a panel that was specified around 3RH2122-2AV60 without rewiring?","answer":"No — the 3RH2122-2AV60 is a different form factor (45 mm wide, 73 mm deep, screw and snap-on mounting) and a standalone auxiliary contactor, not a front-mounted switch block. The 3RH2911-2NN22-0MC0 is a smaller add-on block that clips onto specific 3RT contactors via adapter kits, so it won't physically replace the 3RH2122-2AV60 in the same panel footprint or wiring scheme."},{"question":"Where can I buy 3RH2911-2NN22-0MC0 and how is it quoted?","answer":"It's sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2NN22-0MC0","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/3RH2911-2NN22-0MC0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}