{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1NF11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1NF11","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1NF11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1NF11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1911-1NF11, solid-state compatible auxiliary switch block, 1 NO + 1 NC, screw-type terminals, size S00, snap-on mounting, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH1911-1NF11 is a solid-state compatible auxiliary switch block with 1 normally open and 1 normally closed instantaneous contact, designed for use with SIRIUS contactor relays and power contactors in the size S00 frame. It snaps onto a 35 mm DIN rail per EN 50022 and occupies a 36.5 mm wide slot — the S00 footprint that fits alongside the base contactor without eating extra panel width. The contacts are rated for 0.3 A at both 24 V and 60 V — this is a signal-level auxiliary switch, not a power contactor. It handles PLC inputs, relay coils, and indicator lamps, not motor currents. That low-level switching guarantee means it works with solid-state inputs and dry-contact circuits where oxide films on standard contacts would cause intermittent faults. Mechanical service life is 5 million operating cycles typical — adequate for most auxiliary switching duties in a control panel, though a high-cycle pick-and-place line might want to budget for replacement sooner. Screw-type terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core-end processing, or 2x (20... 16) and 2x (18... 14) AWG. Strip and torque per Siemens standard — no special tooling needed.","metaTitle":"Siemens 3RH1911-1NF11 SIRIUS Auxiliary Switch, 1 NO + 1 NC,","metaDescription":"Siemens SIRIUS 3RH1911-1NF11 auxiliary switch block, 1 NO + 1 NC, screw terminals, size S00, snap-on mounting. Phased-out; successor 3RH2911-1NF11. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"41.5 mm","Width":"36.5 mm","Height":"37.5 mm","at 24 V":"0.3 A","at 60 V":"0.3 A","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay and power contactor","Instantaneous Contact":"1","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 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 ... 16), 2x (18 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=333769&mlfb=3RH1911-1NF11","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1NF11/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RH1911-1NF11?","answer":"The Siemens SIRIUS 3RH2911-1NF11 is the preferred successor. Same size S00 footprint, same snap-on DIN rail mounting, same screw-type terminals, same 1 NO + 1 NC contact arrangement."},{"question":"Will 3RH1911-1NF11 fit a panel designed for 3RT1015-1BB42?","answer":"The 3RT1015-1BB42 is a power contactor (size S00, 45 mm wide), while the 3RH1911-1NF11 is an auxiliary switch block (36.5 mm wide). They share the same S00 frame and snap-on mounting, so the auxiliary switch clips onto the contactor or mounts adjacent on the same DIN rail. No rewiring needed for the auxiliary circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1NF11","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/3RH1911-1NF11 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}}