{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5BB41","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5BB41","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5BB41","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BB41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, magnet coil for Size S3 contactors, 24 V DC, screw terminal, order code 3RT1944-5BB41.","salesMarkdown":"The Siemens 3RT1944-5BB41 is a SIRIUS magnet coil for Size S3 contactors, a 24 V DC replacement coil with screw terminals. It's listed as a current lifecycle product, but the manufacturer's own description flags it as a phased-out part with a direct successor in the SIRIUS 3RT2 series. ## What the 24 V DC rating means for fit The 24 V DC coil rating is the control voltage that pulls the contactor in — not the main power path. If your panel's control transformer or DC power supply is already delivering 24 VDC, this coil drops straight in. The screw terminals match the Size S3 contactor's standard wiring interface, so no adapter plate or re-termination block is needed for a like-for-like swap. The screw terminals accept the same wiring as the parent contactor's control circuit.","metaTitle":"Siemens 3RT1944-5BB41 SIRIUS Magnet Coil, 24 V DC, Size S3","metaDescription":"Siemens SIRIUS 3RT1944-5BB41 magnet coil for Size S3 contactors, 24 V DC screw terminal. Phased-out product; successor is SIRIUS 3RT2. 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","1 at DC rated value":"24 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=191162&mlfb=3RT1944-5BB41","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BB41/alternatives.json"},"ai":{"faq":[{"question":"What is the brand and product line?","answer":"This is a Siemens SIRIUS magnet coil. The SIRIUS line covers industrial control gear including contactors, overload relays, and accessories for panel building and motor control."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5BB41","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/3RT1944-5BB41 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}}