{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5944-5BF41","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5944-5BF41","canonicalUrl":"https://aoctrl.com/siemens/3RT5944-5BF41","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5944-5BF41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil, 3RT5944-5BF41, 110 V DC, for size S3 contactors, screw-type terminals.","salesMarkdown":"The Siemens 3RT5944-5BF41 is a SIRIUS magnet coil, 110 V DC rated, for size S3 contactors with screw-type connections. It replaces a failed coil on a SIRIUS S3 power contactor without removing the contactor from the DIN rail. ## What the 110 V DC rating means for fit The coil is wound for a 110 V DC control supply. That's a common voltage in industrial DC control buses, but it is specific — if your panel runs 24 V DC or 48 V DC control, this coil will not pull in reliably. That means Siemens has not flagged this order code for phase-out or last-time-buy as of the latest data. It remains available through the standard SIRIUS distribution channel. ## Panel integration — size S3 footprint This coil mounts onto any SIRIUS size S3 contactor frame. The screw terminals accept 2x (2.5... 16 mm²) solid or stranded wire.","metaTitle":"Siemens 3RT5944-5BF41 SIRIUS Magnet Coil, 110 V DC, Size S3","metaDescription":"Siemens 3RT5944-5BF41 SIRIUS magnet coil, 110 V DC, for size S3 contactors. Current lifecycle stage. Screw connection. 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":"110 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=580082&mlfb=3RT5944-5BF41","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5944-5BF41/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT5944-5BF41 used for?","answer":"It is a replacement magnet coil for SIRIUS size S3 contactors, 110 V DC control voltage, with screw-type terminals. Use it when the original coil on an S3 contactor fails in the field."},{"question":"Will 3RT5944-5BF41 drop into a panel wired for 3RT5046-1BM40?","answer":"The 3RT5046-1BM40 is a complete power contactor (size S3, 220 V DC coil), not just a coil. The 3RT5944-5BF41 coil itself is the same physical size and terminal arrangement as the coil inside the 3RT5046-1BM40, but the voltage is different — 110 V DC versus 220 V DC. If your panel control voltage is 110 V DC, the coil fits the same contactor frame; if it's 220 V DC, you need the 220 V DC coil variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5944-5BF41","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/3RT5944-5BF41 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}}