{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA40-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA40-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1FA40-ZW96, 4 NO contacts, screw terminals, 10 A maximum, IP20 front, snap-on mounting for size S00 contactors.","salesMarkdown":"It provides four normally open (4 NO) instantaneous contacts, wired via screw-type terminals, and snaps onto the contactor without tools — a standard panel integration for motor control centers and distribution boards. The block is rated for a maximum continuous current of 10 A, but the real-world switching capacity depends on the voltage and duty. At 24 V DC it handles 6 A; at 110 V DC it drops to 1 A; at 230 V AC it carries 6 A. These are the numbers that govern whether the block can switch a given pilot device or solenoid without welding contacts. The AC-15 rating at 690 V is 1 A — that's the inductive load curve for contactor coils and valves at higher line voltages. Mechanical life is 10 million switching cycles typical, so the block outlasts most contactors it mounts on. That places it in the standard industrial insulation coordination class for ungrounded or grounded 400 V systems. ## Mechanical fit and wiring Dimensions are 36.5 mm wide, 37.5 mm high, 41.5 mm deep — compact enough for dense panel layouts on the S00 contactor footprint. Snap-on mounting means no screws for the block itself; the contactor carries it. Wiring accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16 AWG) and 2x (18 to 14 AWG) for stranded cable.","metaTitle":"Siemens 3RH1911-1FA40-ZW96 Auxiliary Switch Block, 4 NO, 10","metaDescription":"Siemens SIRIUS 3RH1911-1FA40-ZW96 auxiliary switch block, 4 NO contacts, 10 A max, IP20 front. 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":"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 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=273472&mlfb=3RH1911-1FA40-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RH1911-1FA40-ZW96?","answer":"The official successor is the SIRIUS 3RH2 series auxiliary switch block. The 3RH2140-1BP40 is a direct functional peer with the same 4 NO contact configuration and screw terminals, but it has a larger footprint (45 mm wide, 73 mm deep) and mounts on a 35 mm DIN rail rather than snapping onto the S00 contactor. Verify panel space and mounting before substituting."},{"question":"Where can I buy 3RH1911-1FA40-ZW96?","answer":"This phased-out part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."},{"question":"What is the contact configuration of 3RH1911-1FA40-ZW96?","answer":"It has 4 normally open (4 NO) instantaneous auxiliary contacts, identified as configuration 40 E per EN 50005."},{"question":"What is the maximum current rating of 3RH1911-1FA40-ZW96?","answer":"The maximum continuous current is 10 A. At 24 V DC it switches 6 A; at 230 V AC it also switches 6 A. The AC-15 inductive rating at 690 V is 1 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-ZW96","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-ZW96 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}}