{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1945-5AK61","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1945-5AK61","canonicalUrl":"https://aoctrl.com/siemens/3RT1945-5AK61","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1945-5AK61","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Magnet coil, 3RT1945-5AK61, for contactors Size S3, screw terminal, 110 V AC 50 Hz / 120 V 60 Hz.","salesMarkdown":"The Siemens SIRIUS 3RT1945-5AK61 is a magnet coil designed for Size S3 contactors in the SIRIUS family. It provides the electromagnetic actuation for the contactor main poles and auxiliary contacts, rated for 110 V AC at 50 Hz or 120 V at 60 Hz, with a screw terminal connection. The lifecycle stage for this order code is listed as current, but the description flags it as a phased-out product. The official successor is the SIRIUS 3RT2 series. ## Deployment context","metaTitle":"Siemens 3RT1945-5AK61 SIRIUS Magnet Coil, 110V AC 50Hz / 120","metaDescription":"Siemens SIRIUS 3RT1945-5AK61 magnet coil for Size S3 contactors. 110V AC 50Hz / 120V 60Hz, screw terminal. Lifecycle stage: current. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil"}},"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=155922&mlfb=3RT1945-5AK61","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1945-5AK61/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1945-5AK61?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the official successor for 3RT1945-5AK61?","answer":"The manufacturer lists the SIRIUS 3RT2 series as the successor. Verify panel fit and wiring before substituting."},{"question":"What brand and series is 3RT1945-5AK61?","answer":"It is a Siemens SIRIUS magnet coil for Size S3 contactors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1945-5AK61","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/3RT1945-5AK61 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}}