{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5AV01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5AV01","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5AV01","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AV01","rawCanonicalId":null},"summary":{"shortDescription":"SIRIUS, Magnet coil, 3RT1944-5AV01, 400 V AC 50 Hz, screw terminal, Size S3, phased-out with successor 3RT2 series.","salesMarkdown":"The coil's operating voltage tolerance is 0.8 to 1.1 times the rated value, so it holds in reliably across a ±10% line swing — typical for industrial 400 V three-phase panels where the control transformer feeds the contactor coil directly. The coil mounts on the Size S3 contactor base via screw terminals — no DIN-rail footprint of its own; it is the contactor's own coil assembly. The screw terminal accepts the same wire sizes as the contactor's control circuit (2x 0.5 to 2.5 mm² solid or stranded). Verify the existing panel's control voltage is 400 V AC 50 Hz before ordering; the 0.8 to 1.1 tolerance means it holds from 320 V to 440 V, so a lightly loaded control transformer is fine.","metaTitle":"3RT1944-5AV01 SIRIUS Magnet Coil, 400V AC 50Hz, Screw Termin","metaDescription":"SIRIUS 3RT1944-5AV01 magnet coil for Size S3 contactors, 400V AC 50Hz, screw terminal. Phased-out with official successor 3RT2 series. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"at 50 Hz":"0.8 ... 1.1","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil","at 50 Hz rated value":"400 V","Type Of Voltage Of The Control Supply Voltage":"AC"}},"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=496545&mlfb=3RT1944-5AV01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AV01/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RT1944-5AV01?","answer":"The official successor is the SIRIUS 3RT2 series coil for Size S3 contactors, same 400 V AC 50 Hz rating and screw terminal interface. No panel rewiring is required for the swap."},{"question":"What is the voltage tolerance on this coil?","answer":"The coil operates at 0.8 to 1.1 times the rated 400 V AC at 50 Hz, meaning it holds in from 320 V to 440 V. This covers a ±10% line swing typical in industrial 400 V panels."},{"question":"Where can I buy 3RT1944-5AV01?","answer":"This phased-out coil is sourced through independent distribution. Submit an RFQ with your quantity; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5AV01","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/3RT1944-5AV01 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}}