{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1911-1FA40-ZX95 auxiliary switch block, 4 NO contacts, screw-type terminals, 10 A maximum, snap-on mounting, IP20 front protection.","salesMarkdown":"This is a phased-out product. The official successor is the SIRIUS 3RH2 series. If you are sourcing for a BOM that lists this exact order code, the replacement path is clear, but the footprint and ratings differ — verify panel fit before committing the line. The 10 A maximum applies across the board, but the voltage-specific ratings tell you what the block can actually switch under load. At 24 V DC it handles 6 A; at 125 V DC, 6 A; at 230 V DC, 6 A; at 400 V AC, 3 A. The AC-15 rating at 690 V is 1 A. These are the numbers that govern real-world contact life — the 10 A ceiling is only valid for resistive loads at low voltage. Contact reliability is specified at one faulty switching operation per 100 million cycles at 17 V and 5 mA (or 1 mA for the auxiliary contacts). That is the low-energy switching floor — below those levels, you risk intermittent contact. Do not use this block for dry-circuit logic signals below that threshold. ## Lifecycle Status — Phased Out, Successor Identified The 3RH1911-1FA40-ZX95 is explicitly marked as a phased-out product. The manufacturer's designated successor is the SIRIUS 3RH2 series. No last-time-buy date is listed here, so procurement must treat this as a non-stocked item available only through independent distribution or remaining surplus. Snap-on mounting onto the contactor or contactor relay. The block carries 4 NO instantaneous contacts and uses screw-type terminals accepting 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16) and 2x (18 to 14) AWG. Front protection is IP20 — suitable for enclosed panels, not open washdown environments. Surge voltage resistance is rated at 6 kV, with insulation voltage at 690 V for pollution degree 3.","metaTitle":"Siemens 3RH1911-1FA40-ZX95 Auxiliary Switch Block, 4 NO, 10","metaDescription":"Siemens SIRIUS 3RH1911-1FA40-ZX95 auxiliary switch block. 4 NO contacts, 10 A max, screw terminals, snap-on mounting. Phased-out; successor is 3RH2 series. Sourced to order against","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","Mounting type":"snap-on mounting","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Product brand name":"SIRIUS","Contact reliability":"one incorrect switching operation of 100 million switching operations (17 V, 5 mA)","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":"4","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 conductors 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","Insulation voltage with degree of pollution 3 rated value":"690 V","Type of electrical connection for auxiliary and control current circuit":"screw-type terminals"}},"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=291466&mlfb=3RH1911-1FA40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZX95/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-ZX95","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/3RH1911-1FA40-ZX95 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}}