{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2XA31-0MA0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2XA31-0MA0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2XA31-0MA0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XA31-0MA0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary switch block, 3 NO + 1 NC, spring-loaded terminals, rated 10 A, for 3RT2 contactors and 3RH2 contactor relays, IP20 front protection.","salesMarkdown":"The Siemens 3RH2911-2XA31-0MA0-ZX95 is a front-mounted auxiliary switch block in the SIRIUS family, designed to snap onto 3RT2 power contactors and 3RH2 contactor relays. It provides 3 normally-open and 1 normally-closed auxiliary contacts, wired to terminals 53/54, 61/62, 73/74, and 83/84. The spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferrules or 2x (0.5 to 2.5 mm²) solid, or 2x (20 to 14 AWG). The contacts are rated 10 A maximum, but the real selection driver is the AC-15 rating at 690 V: 1 A. That's the inductive load rating for contactor coils and solenoid valves — the duty cycle that kills underspecified contacts. If you're switching a 24 VDC contactor coil, the 24 V rated value is 10 A; at 110 V it drops to 3 A, and at 220 V to 1.2 A. For DC-13 (solenoid) loads, the 24 V rating is 6 A, 60 V is 2 A, 110 V is 1 A, and 220 V is 0.3 A. If the signal chain involves a PLC input at low voltage, this block won't give you intermittent dropout from oxide films. That means it's suitable for direct mounting in the same panel as the power contactor without additional isolation barriers, even in environments with conductive dust or humidity (PD3). The IP20 front protection keeps fingers out but doesn't seal against washdown — this is a panel-interior part. Snap-on mounting directly to the front of 3RT2 contactors or 3RH2 contactor relays. The block is 36 mm wide, 47.7 mm deep, and 41.5 mm high — it adds about 48 mm to the depth of the contactor. No tools needed for installation; it clips onto the contactor's front interface. The spring-loaded terminals face forward, so wiring is accessible with the contactor DIN-rail mounted.","metaTitle":"Siemens 3RH2911-2XA31-0MA0-ZX95 SIRIUS Auxiliary Switch, 3NO","metaDescription":"Siemens SIRIUS auxiliary switch block for 3RT2 contactors and 3RH2 relays. 3 NO + 1 NC, spring-loaded terminals, rated 10 A. Current production. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","Height":"41.5 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":"3","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 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 ... 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":"spring-loaded 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=646175&mlfb=3RH2911-2XA31-0MA0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XA31-0MA0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the note 'with 3RH2' on this component?","answer":"The note indicates this auxiliary switch block is designed to mount on 3RH2 contactor relays, as well as 3RT2 power contactors. It's the front-mount version, not a side-mount or base-mount auxiliary."},{"question":"What are the key current ratings I need to check for fit?","answer":"The maximum contact rating is 10 A. For AC-15 inductive loads (contactor coils) at 690 V, the rating is 1 A. For DC-13 solenoid loads at 24 V, it's 6 A; at 110 V it's 1 A; at 220 V it's 0.3 A. The AC-15 690 V figure is the one that governs most 400 V control circuits."},{"question":"Will this drop into a panel specified around 3RH2422-1AB00?","answer":"No, these are different form factors. The 3RH2911 is a front-mount auxiliary block for 3RT2/3RH2 contactors. The 3RH2422 is a complete contactor relay with its own coil and base-mounted auxiliaries. They are not mechanically interchangeable without changing the base contactor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2XA31-0MA0-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/3RH2911-2XA31-0MA0-ZX95 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}}