{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1DC11-0KW0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1DC11-0KW0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1DC11-0KW0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1DC11-0KW0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH2911-1DC11-0KW0, 1 NO + 1 NC, lateral mount, screw terminals, 10 A max, 66 mm depth.","salesMarkdown":"The Siemens 3RH2911-1DC11-0KW0 is a lateral-mounted auxiliary switch block from the SIRIUS family, carrying 1 normally-open and 1 normally-closed contact. The NO contact is leading (closes first on pickup), the NC contact is lagging (opens first on dropout), which gives you sequenced switching for interlocking or logic feedback in a motor starter or contactor relay circuit. ## Switching ratings — what they mean on the line The block is rated for 10 A maximum, but the real-world limit depends on your voltage and load type. At 24 V DC it switches 6 A; at 60 V DC it drops to 2 A; at 220 V DC you're down to 0.3 A. For AC-15 inductive loads at 690 V it's rated 1 A. These aren't just numbers — they tell you where this block will hold up and where it won't. If you're switching a 24 V DC pilot light or a PLC input, the 6 A rating gives you plenty of headroom. If you're trying to break a 220 V DC solenoid at 0.5 A, the 0.3 A rating says you're pushing it — expect contact wear. The contacts are rated for 10 million mechanical switching cycles typical, and the contact reliability spec says fewer than 1 faulty switching per 100 million operations at 17 V, 1 mA. That's a solid number for dry-signal switching — think PLC inputs or safety relay feedback where a bad contact means a nuisance fault. ## Mounting and wiring in the panel Snap-on mounting clips directly to the contactor. The 10 mm width keeps the assembly tight. Screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire.","metaTitle":"Siemens 3RH2911-1DC11-0KW0 SIRIUS Auxiliary Switch, 1 NO + 1","metaDescription":"Siemens SIRIUS 3RH2911-1DC11-0KW0 auxiliary switch block, 1 NO + 1 NC, 10 A max, snap-on for 3RT2.1 contactors. Screw terminals, IP20 front. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"66 mm","Width":"10 mm","Height":"57.4 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":"1","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"1","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 (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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=528788&mlfb=3RH2911-1DC11-0KW0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1DC11-0KW0/alternatives.json"},"ai":{"faq":[{"question":"Will the 3RH2911-1DC11-0KW0 fit a 3RT5056 power contactor without rewiring?","answer":"This block is designed to snap onto 3RT2.1 contactors. The 3RT5056 is a different frame size and series — it will not mechanically fit without adaptation, and the terminal assignments differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1DC11-0KW0","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/3RH2911-1DC11-0KW0 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}}