{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2HA02","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2HA02","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2HA02","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary switch block, 3RH2911-2HA02, 2 NC contacts, spring-loaded terminals, 10 A max, snap-on mounting for contactors 3RT2 and contactor relays 3RH2.","salesMarkdown":"This is a Siemens SIRIUS auxiliary switch block, order code 3RH2911-2HA02, designed to snap onto the front of 3RT2 contactors and 3RH2 contactor relays. It carries two normally-closed (NC) contacts, each rated for a maximum of 10 A, with the switching capacity derated by voltage — at 24 V it handles 6 A, at 110 V it handles 1 A, and at 400 V it handles 3 A. For AC-15 pilot-duty loads at 690 V it's rated 1 A. That means in a control panel you're using this to signal a 'stopped' or 'off' state back to the PLC or safety relay, not to break motor current directly. Connections are spring-loaded terminals — no screwdriver needed for the wire, just strip and push. Accepts 2x (0.5 to 1.5 mm²) with ferrules, or 2x (0.5 to 2.5 mm²) bare stranded. That's a standard panel-building wire range; you'll be fine with 18 AWG or 16 AWG. Snap it onto the contactor front; the 36 mm width sits flush with the contactor body, so it doesn't steal extra DIN-rail space. ## Insulation and protection Mechanical life is rated at 10 million switching cycles, and contact reliability is 1 faulty switching per 100 million operations at 17 V, 1 mA — that's a good number for dry-circuit signaling where you can't afford a missed contact.","metaTitle":"Siemens 3RH2911-2HA02 Auxiliary Switch, 2 NC, Spring-Loaded","metaDescription":"Siemens SIRIUS 3RH2911-2HA02 auxiliary switch block, 2 NC contacts, spring-loaded terminals, rated 10 A max. For 3RT2 contactors & 3RH2 relays. Snap-on mounting. Available to order","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":"0","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":"$4.31","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/af54e88a26a4026d5bbcfd3e9c7258a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=419347&mlfb=3RH2911-2HA02","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2HA02/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RH2911-2HA02 used for?","answer":"It's an auxiliary switch block that snaps onto Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays to provide two normally-closed auxiliary contacts for status feedback or interlocking in a control circuit."},{"question":"Where can I buy the 3RH2911-2HA02 and get a price?","answer":"We source and quote this part to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is listed here because it changes with supply. Submit an RFQ through the site and we'll get you a firm number."},{"question":"What wire size does the 3RH2911-2HA02 accept?","answer":"Spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferruled ends, or 2x (0.5 to 2.5 mm²) bare stranded wire. For AWG, that's 2x (20 to 14)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2HA02","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/3RH2911-2HA02 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}}