{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1LA20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1LA20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1LA20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1LA20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1LA20-ZX95, 2 NO, screw terminals, snap-on mounting for size S00 contactors, rated 10 A.","salesMarkdown":"It snaps onto the front of the contactor — no tools, no extra wiring space — and connects via screw terminals sized for 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) conductors. Rated at 10 A at 24 V and 6 A at 230 V for AC-15 duty, it handles the typical pilot-duty loads — relay coils, contactor coils, indicator lamps — that a control panel throws at auxiliary contacts. The block is IP20 front-protected, sized 36.5 mm wide by 37.5 mm high by 41.5 mm deep, and mounts on a 35 mm DIN rail via the contactor's own snap-on feature. ## Lifecycle reality — phased out, successor ready For new designs or replacement of a failed unit, the 3RH2 series (e.g., 3RH2122-1WB40) offers the same 2 NO contact arrangement, similar AC-15 ratings (10 A at 24 V, 3 A at 400 V), and adds a varistor surge suppressor.","metaTitle":"Siemens 3RH1911-1LA20-ZX95 Auxiliary Switch Block, 2 NO, S00","metaDescription":"Siemens SIRIUS auxiliary switch block 3RH1911-1LA20-ZX95, 2 NO, snap-on S00, 10 A rated. Phased-out; successor 3RH2 available. Sourced to order. Request quote.","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":"2","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=173835&mlfb=3RH1911-1LA20-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1LA20-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Will 3RH1911-1LA20-ZX95 drop into a panel wired for 3RH2122-1WB40?","answer":"No. The 3RH1911 is 41.5 mm deep and 36.5 mm wide; the 3RH2122 is 73 mm deep and 45 mm wide. They also mount differently on the contactor. You would need to rework the panel layout and wiring."},{"question":"What are the key ratings of 3RH1911-1LA20-ZX95?","answer":"Rated 10 A at 24 V (AC-15), 6 A at 230 V, 3 A at 400 V. Mechanical life 10 million cycles. Contact reliability: 1 fault per 100 million operations at 17 V, 5 mA. IP20 front protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1LA20-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/3RH1911-1LA20-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}}