{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5BE42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5BE42","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5BE42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BE42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, magnet coil for contactors, Size S3, spring-loaded connection, 60 V DC, phased-out product with successor SIRIUS 3RT2.","salesMarkdown":"The Siemens SIRIUS 3RT1944-5BE42 is a 60 V DC magnet coil designed for Size S3 contactors in the SIRIUS family, using spring-loaded connection technology. It replaces the older coil on a Size S3 contactor frame — the same frame that carries the 3RT1044 power contactor — and is the control-side component that pulls the contactor in and holds it closed. This part carries a lifecycle stage of \"current\" but the manufacturer explicitly flags it as a phased-out product. The official successor is the SIRIUS 3RT2 series. The successor 3RT2 series is the recommended forward-fit path for new designs. ## What the 60 V DC rating means for the panel The 60 V DC control voltage is the coil's nominal pick-up and hold rating. On a Size S3 contactor frame the coil draws a closing power of 15 W and a holding power of 15 W (typical for this frame size). The spring-loaded connection accepts solid or stranded conductors — 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²), max 2x (0.75... 4 mm²) — and the contactor mounts via screw and snap-on onto 35 mm DIN rail per EN 50022. The IP20 rating on the front means the coil's terminal area is finger-safe inside the enclosure; the contactor's main terminals are IP00, so the panel builder provides the enclosure protection.","metaTitle":"Siemens 3RT1944-5BE42 SIRIUS Magnet Coil, 60 V DC, S3","metaDescription":"Siemens SIRIUS 3RT1944-5BE42 magnet coil for Size S3 contactors, 60 V DC spring-loaded connection. Phased-out — 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":"60 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=409864&mlfb=3RT1944-5BE42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5BE42/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RT1944-5BE42?","answer":"The official successor is the SIRIUS 3RT2 series. For new designs or BOM updates, the 3RT2 coil is the recommended forward-fit path. The 3RT1944-5BE42 itself is sourced to order against an RFQ through independent channels."},{"question":"Where can I buy 3RT1944-5BE42?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. Submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5BE42","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/3RT1944-5BE42 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}}