{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5BW42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5BW42","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5BW42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BW42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, magnet coil for Size S3 contactors, 3RT1944-5BW42, 48 V DC, spring-loaded connection technology.","salesMarkdown":"The Siemens SIRIUS 3RT1944-5BW42 is a replacement magnet coil for Size S3 contactors in the SIRIUS family. It is a 48 V DC coil with spring-loaded (cage-clamp) terminals, designed to be swapped into an existing S3 contactor when the original coil fails or when a control voltage change is needed. ## Lifecycle reality — phased out, successor named This order code is explicitly marked as a phased-out product. The manufacturer's designated successor is the SIRIUS 3RT2 series.","metaTitle":"Siemens 3RT1944-5BW42 SIRIUS Magnet Coil, 48 V DC, Spring-Lo","metaDescription":"Siemens SIRIUS 3RT1944-5BW42 magnet coil for Size S3 contactors. 48 V DC, spring-loaded terminals. Phased-out; successor is the SIRIUS 3RT2 series. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"lifecycle_stage":"current","Product Brand Name":"SIRIUS","1 at DC rated value":"48 V","Product Designation":"Magnet coil","Type Of Voltage Of The Control Supply Voltage":"DC"}},"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=106068&mlfb=3RT1944-5BW42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BW42/alternatives.json"},"ai":{"faq":[{"question":"What voltage does this coil require?","answer":"48 V DC. The control supply voltage type is DC, and the rated value is 48 V."},{"question":"What connection technology does this coil use?","answer":"Spring-loaded (cage-clamp) terminals. No screwdriver needed for the wire connection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5BW42","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/3RT1944-5BW42 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}}