{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1MA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1MA11","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1MA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1MA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1911-1MA11 auxiliary switch block, 1 NO + 1 NC, snap-on mounting, screw-type terminals, 10 A max, 41.5 mm depth.","salesMarkdown":"It uses screw-type terminals and is rated for a maximum of 10 A, with specific switching capacities at different voltages — for example, 6 A at 24 V, 3 A at 400 V, and 0.26 A at 600 V. The mechanical service life is rated at 10,000,000 switching cycles typical, with contact reliability of 1 faulty switching per 100 million operations at 17 V, 1 mA. ## Panel integration Snap-on mounting onto the contactor or contactor relay — no DIN rail footprint of its own. The block measures 36.5 mm wide, 41.5 mm deep, and 37.5 mm high. Front protection is IP20, so it's suited for enclosed panel use where no washdown or dust ingress is expected. Wiring is via screw terminals accepting 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core-end processing. The 10 A maximum is the thermal current (Ith) — the continuous current the contacts can carry in free air. The real switching capacity depends on voltage and load type: at 24 V it switches 6 A, at 110 V it drops to 1 A, and at 600 V it's only 0.26 A. For AC-15 inductive loads (typical for contactor coils and solenoid valves), the rated value at 690 V is 1 A. The surge voltage resistance is 6 kV, and insulation voltage is 690 V at pollution degree 3.","metaTitle":"Siemens 3RH1911-1MA11 SIRIUS Auxiliary Switch Block, 1 NO +","metaDescription":"Siemens SIRIUS 3RH1911-1MA11 auxiliary switch block, 1 NO + 1 NC, snap-on mounting, screw terminals, 10 A max. Phased-out; successor is 3RH2911-1MA11. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 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","Mounting type":"snap-on mounting","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","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":"1","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 conductors 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","Insulation voltage with degree of pollution 3 at AC rated value":"690 V","Type of electrical connection for auxiliary and control current circuit":"screw-type terminals"}},"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=367758&mlfb=3RH1911-1MA11","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1MA11/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RH1911-1MA11?","answer":"The preferred successor is the SIRIUS 3RH2911-1MA11."},{"question":"What are the key ratings of the 3RH1911-1MA11?","answer":"Maximum 10 A, with switching capacities of 6 A at 24 V, 3 A at 400 V, and 0.26 A at 600 V. Mechanical life is 10,000,000 cycles typical. Insulation voltage is 690 V at pollution degree 3, with 6 kV surge voltage resistance."},{"question":"Will the 3RH1911-1MA11 drop into a panel designed for the 3RH2422-1AB00?","answer":"No. The 3RH2422-1AB00 is a full auxiliary contactor with 2 NO + 2 NC, screw and snap-on mounting onto 35 mm DIN rail, and dimensions of 90 mm width and 73 mm depth. The 3RH1911-1MA11 is a smaller auxiliary switch block (36.5 mm wide, 41.5 mm deep) that snaps onto S00 contactors — not a direct panel swap without rewiring and re-spacing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1MA11","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/3RH1911-1MA11 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}}