{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA31-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA31-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA31-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA31-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1FA31-ZW97, 3 NO + 1 NC per EN 50005, screw terminals, size S00, 10 A maximum, snap-on mounting.","salesMarkdown":"It provides 3 normally open (NO) and 1 normally closed (NC) contact configuration per EN 50005, wired via screw-type terminals. The block snaps onto the contactor without tools, adding auxiliary contacts for status feedback, interlocking, or control logic extension. Rated at 10 A maximum, with derated currents per voltage level: 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, and 3 A at 400 V. The AC-15 rating at 690 V is 1 A, which governs switching of electromagnetic loads like contactor coils in higher-voltage control circuits. The insulation voltage is 690 V at pollution degree 3, and surge voltage resistance is 6 kV — adequate for industrial control panels with standard overvoltage category III. Mechanical service life is 10 million switching cycles typical. ## Physical integration and environment Dimensions: 36.5 mm wide, 37.5 mm high, 41.5 mm deep. Snap-on mounting to the contactor — no DIN rail required for the block itself, though the contactor typically mounts on a 35 mm rail. IP20 protection on the front, suitable for enclosed panel use. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16) and 2x (18 to 14) AWG.","metaTitle":"Siemens 3RH1911-1FA31-ZW97 Auxiliary Switch Block, 3 NO + 1","metaDescription":"Siemens SIRIUS 3RH1911-1FA31-ZW97 auxiliary switch block, 3 NO + 1 NC contacts, rated 10 A. Phased-out; successor is 3RH2 series. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 mm","Height":"37.5 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"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","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Instantaneous Contact":"3","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","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 (Switching Cycles) Typical":"10 000 000","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=510199&mlfb=3RH1911-1FA31-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA31-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RH1911-1FA31-ZW97?","answer":"The official successor is the SIRIUS 3RH2 series auxiliary switch blocks. Verify the contact configuration and mounting compatibility for your specific contactor frame."},{"question":"Where can I buy the 3RH1911-1FA31-ZW97 and get a price?","answer":"This part is sourced through independent distribution channels. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the contact configuration of this auxiliary switch block?","answer":"It provides 3 normally open (NO) and 1 normally closed (NC) contacts, arranged per EN 50005."},{"question":"What is the maximum current rating?","answer":"The maximum continuous current is 10 A, with derated values at higher voltages: 6 A at 24 V, 6 A at 230 V, and 3 A at 400 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA31-ZW97","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/3RH1911-1FA31-ZW97 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}}