{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA40-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA40-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH1911-1FA40-ZW97, 4 NO instantaneous contacts, snap-on mounting for S00 contactors, IP20 front.","salesMarkdown":"It adds four normally-open instantaneous contacts for signal feedback or interlocking in motor control circuits. Rated for 10 A at 24 V for AC-12 duty, it handles control-circuit switching across a range of voltages — 6 A at 24 V, 2 A at 48 V, 1 A at 110 V, and 0.3 A at 250 V — so the same block works from 24 VDC control loops up to 250 VAC pilot circuits. The surge voltage resistance is rated at 6 kV, and the contacts are mirror contacts per IEC 60947-4-1 when used with the 3RT1 contactor series, meaning a welded contact won't go undetected in safety circuits. Snaps directly onto the front of an S00 contactor — no tools, no DIN rail space consumed. The block measures 36.5 mm wide by 41.5 mm deep by 37.5 mm tall, so it adds minimal depth to the contactor assembly inside the panel. Terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, or 2x (20 to 16) AWG. Finely stranded with ferrules is the same range. Strip length follows standard practice for spring-cage terminals. The mechanical service life is rated at 10 million operating cycles typical, and contact reliability is 1 fault per 100 million operations at 17 V, 1 mA.","metaTitle":"Siemens 3RH1911-1FA40-ZW97 SIRIUS Auxiliary Switch, 4 NO Con","metaDescription":"Siemens SIRIUS 3RH1911-1FA40-ZW97 auxiliary switch for S00 contactors. 4 NO contacts, snap-on mount, 10 A at 24 V. Active production, 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":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"0.3 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 Category":"Auxiliary switch","Size Of Contactor":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","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","Design Of The Product":"for snapping onto the front","Instantaneous Contact":"4","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT1","operational current at AC-15 at 690 V rated value":"1 A","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","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","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"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=368167&mlfb=3RH1911-1FA40-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA40-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for this auxiliary switch?","answer":"The 3RT1015-1BB42 is a SIRIUS contactor that accepts this same 3RH1911 auxiliary switch block. The switch snaps onto the front of any S00 contactor, so if your panel is built around a 3RT1015, this block drops in without rewiring."},{"question":"Will this switch work with a 3RT1015-1BB42 contactor?","answer":"Yes. The 3RH1911-1FA40-ZW97 is designed for S00-size contactors, which includes the 3RT1015 series. It snaps onto the front and adds four NO auxiliary contacts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA40-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/3RH1911-1FA40-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}}