{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1FA40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1FA40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1FA40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, front-mounted, 4 NO, screw terminals, 10 A, for 3RT2 contactors and 3RH2 contactor relays, snap-on mounting.","salesMarkdown":"The Siemens 3RH2911-1FA40-ZX95 is a front-mounted auxiliary switch block from the SIRIUS family, designed specifically for 3RT2 contactors and 3RH2 contactor relays. It provides four normally open (NO) instantaneous contacts in a single compact add-on module that snaps onto the front of the base device without tools. Snap-on mounting onto the contactor or relay face means no additional DIN-rail space is consumed — the block rides with the base device. Panel layout stays unchanged when adding this auxiliary contact set. Rated at 10 A thermal current (Ith), with AC-15 switching capacity of 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. These are the values that govern whether the contacts hold under repeated inductive load switching — the 400 V / 3 A rating, for instance, is what matters for a 400 V control transformer primary or a valve solenoid on a 400 VAC line. DC switching ratings are also specified: 10 A at 24 V DC, 4.7 A at 60 V DC, 1.2 A at 220 V DC, and 0.26 A at 600 V DC. Rated for 10 million mechanical switching cycles typical — this is the wear limit before contact replacement is recommended, not a guaranteed minimum. The block is intended for use inside an enclosure that provides the environmental seal. Screw-type terminals accept 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) or 2x (18 to 14 AWG) for solid wire. Strip length and ferrule sizing follow standard Siemens terminal practice — no special tooling required. Dimensions: 36 mm wide, 37.5 mm high, 43.7 mm deep — compact enough to fit in shallow backpanels or behind enclosure doors with limited clearance.","metaTitle":"Siemens 3RH2911-1FA40-ZX95 Auxiliary Switch, 4 NO, 10 A","metaDescription":"Siemens SIRIUS 3RH2911-1FA40-ZX95 front-mounted auxiliary switch block, 4 NO contacts, 10 A thermal current, snap-on DIN rail. Active production, sourced 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-ZX95","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, reusable packaging, pack = 351 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/16a9da4d8e54b45effc525a815585674.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=383161&mlfb=3RH2911-1FA40-ZX95"},"ai":{"faq":[{"question":"What is the closest functional alternative — can the 3RH2422-1AB00 replace it?","answer":"The 3RH2422-1AB00 is a different form factor (contactor relay base device, not an add-on switch block). The 3RH2911-1FA40-ZX95 is a front-mounted accessory for 3RT2/3RH2 bases; it does not drop into a panel wired for a 3RH2422 without rewiring the mounting and connections. Stick with the 3RH2911 for add-on auxiliary contacts on the 3RT2/3RH2 platform."},{"question":"What does the 'Note with 3RH2' mean on this component?","answer":"It means this auxiliary switch block is designed to mount on the front of 3RH2 contactor relays (and 3RT2 contactors). The note confirms compatibility with those base devices — it is not a standalone relay but an add-on contact block."},{"question":"What are the key AC and DC switching ratings?","answer":"AC-15: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. DC: 10 A at 24 V, 4.7 A at 60 V, 1.2 A at 220 V, 0.26 A at 600 V. Thermal current (Ith) is 10 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1FA40-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/3RH2911-1FA40-ZX95 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}