{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FA40-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FA40-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA40-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1FA40-ZW97 auxiliary switch block, 4 NO contacts, screw terminals, 10 A max, IP20 front, snap-on DIN rail mount, for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"## Fit and function — mounts on 3RH2 contactor relays and 3RT2 contactors The 3RH2911-1FA40-ZW97: This auxiliary switch block is designed for front mounting on Siemens 3RH2 contactor relays and 3RT2 power contactors, as noted in the product description (with 3RH2). The four normally-open (4 NO) instantaneous contacts provide auxiliary switching for control circuits, status feedback, or interlock logic. Snap-on mounting to DIN rail (EN 60715) means installation takes seconds without tools, consistent with the SIRIUS modular platform. The 36 mm width and 43.7 mm depth fit standard panel layouts. ## Switching capacity and contact ratings — AC-15 duty for inductive loads Rated 10 A maximum at 24 V and 6 A at 230 V in AC-15 duty. These are the switching current limits for inductive loads such as contactor coils, solenoid valves, and small motors. At 400 V the rating drops to 3 A, so confirm the load voltage and category before specifying. Contact reliability is specified as 1 faulty switching per 100 million operations at 17 V, 1 mA — this is the dry-circuit performance floor. Mechanical service life is 10 million switching cycles typical, supporting high-cycle applications like conveyor interlocks or press controls. ## Environmental and installation constraints Operating temperature range is -25 to +60 °C, storage range -55 to +80 °C. IP20 protection on the front means this block is intended for dry, enclosed control panels only — not for washdown or outdoor exposure. Screw-type terminals accept 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²) conductors, or 2x (20...16) and 2x (18...14) AWG. Surge voltage resistance is 6 kV, confirming insulation coordination for 400/690 V industrial networks per IEC 60947. ## Sourcing and lifecycle — active production, quoted to order This auxiliary switch is sourced and quoted to order against your BOM quantity.","metaTitle":"Siemens 3RH2911-1FA40-ZW97 Auxiliary Switch, 4 NO, 10 A","metaDescription":"Siemens 3RH2911-1FA40-ZW97 auxiliary switch block, 4 NO contacts, 10 A max, screw terminals, snap-on DIN rail mount. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1FA40-ZW97","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","description":"auxiliary switch, on the front, 4 NO,.3/.4,.3/.4,.3/.4,.3/.4, current path: 1 NO, 1 NO, 1 NO, 1 NO, screw terminal, for contactors 3RT2 and contactor relays 3RH2, multi-unit packaging, pack = 120 units","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4a395092efd4a8ba301e947bf21f3a40.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=17342&mlfb=3RH2911-1FA40-ZW97"},"ai":{"faq":[{"question":"What contactor relays does this auxiliary switch mount on?","answer":"This block is designed for front mounting on Siemens 3RH2 contactor relays and 3RT2 power contactors. The four NO contacts provide auxiliary switching for control circuits or status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-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/3RH2911-1FA40-ZW97 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}