{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5AV02","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5AV02","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5AV02","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AV02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Magnet coil, 3RT1944-5AV02, 400 V AC 50 Hz, spring-loaded connection technology, Size S3, phased-out product.","salesMarkdown":"It uses spring-loaded (cage-clamp) connection technology — no screw-terminal torque checks on the coil leads, which speeds panel wiring and stays tight under vibration. This is a phased-out product; the official successor is the SIRIUS 3RT2 series. The 400 V AC 50 Hz coil voltage matches standard European 400 V three-phase line-to-line control circuits. The 0.8... 1.1 operating range at 50 Hz means the coil holds in from 320 V to 440 V — a 20 % undervoltage tolerance that keeps it engaged through sags. The spring-loaded connection accepts 0.5... 2.5 mm² stranded or solid, same as the SIRIUS auxiliary contact blocks, so the same ferrule kit and strip length (8 mm) apply across the panel.","metaTitle":"Siemens 3RT1944-5AV02 SIRIUS Magnet Coil, 400 V AC 50 Hz","metaDescription":"Phased-out Siemens SIRIUS magnet coil 3RT1944-5AV02 for Size S3 contactors, 400 V AC 50 Hz, spring-loaded terminals. Sourced to order; successor is SIRIUS 3RT2 series.","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=488014&mlfb=3RT1944-5AV02","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AV02/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5AV02","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/3RT1944-5AV02 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}}