{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1XA04-0MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1XA04-0MA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1XA04-0MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1XA04-0MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 4 NC, screw terminals, 10 A max, for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"The Siemens 3RH2911-1XA04-0MA0 is a front-mounted auxiliary switch block in the SIRIUS family, delivering four normally-closed (NC) contacts for 3RT2 contactors and 3RH2 contactor relays. It snaps onto the device front via the standard fastening method, adding four isolated NC current paths — labelled 51/52, 61/62, 71/72, 81/82 — without expanding the panel footprint beyond the 36 mm width of the base unit. ## Switching capacity and contact reliability The DC switching curve is steep: 10 A at 24 V, 6 A at 125/230/250 V, 3 A at 400 V, and 0.26 A at 600 V. For AC loads at 60 V it handles 4.7 A; at 110 V, 3 A; at 220 V, 1.2 A; at 440 V, 0.5 A. ## Mechanical endurance and environmental limits Rated for 10 million operating cycles typical mechanical service life, so it outlasts the base contactor in most cyclic applications. Insulation voltage is 690 V at pollution degree 3, with a 6 kV rated surge voltage resistance — sufficient for 400/480 V line-connected control circuits without additional suppression. Screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with ferrule, or 2x (20 to 16 AWG) and 2x (18 to 14 AWG) for solid/stranded. Depth is 43.7 mm, height 37.5 mm, so it stays within the envelope of the host contactor or relay.","metaTitle":"Siemens 3RH2911-1XA04-0MA0 Auxiliary Switch Block, 4 NC, 10","metaDescription":"Siemens SIRIUS 3RH2911-1XA04-0MA0 auxiliary switch block, 4 NC contacts, 10 A max, screw terminals. 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","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","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":"0","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 (Operating 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":"https://cdn.aoctrl.com/e1437c9ac8d3984de9bcd66876c021b8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=478429&mlfb=3RH2911-1XA04-0MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1XA04-0MA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2911-1XA04-0MA0 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability confirmation."},{"question":"What does the note 'with 3RH2' mean on this part?","answer":"It indicates this auxiliary switch block is designed for use with 3RH2 contactor relays — the 3RH2911-1XA04-0MA0 mounts on the front of those relays to add four NC auxiliary contacts."},{"question":"What is the depth of 3RH2911-1XA04-0MA0?","answer":"The depth is 43.7 mm, with a width of 36 mm and height of 37.5 mm — it fits within the standard envelope of the host contactor or relay."},{"question":"Will 3RH2911-1XA04-0MA0 drop into a panel specified around 3RT5056-8AP38-0PR0?","answer":"No — the 3RT5056-8AP38-0PR0 is a power contactor in a different frame size. The 3RH2911-1XA04-0MA0 is designed for 3RT2 contactors and 3RH2 contactor relays only; it will not mechanically fit the larger 3RT5056 platform without adapter hardware."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1XA04-0MA0","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/3RH2911-1XA04-0MA0 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}}