{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1944-5AK62","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1944-5AK62","canonicalUrl":"https://aoctrl.com/siemens/3RT1944-5AK62","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AK62","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS magnet coil, 3RT1944-5AK62, for Size S3 contactors, spring-loaded connection, 110 V AC 50 Hz / 120 V 60 Hz.","salesMarkdown":"The Siemens 3RT1944-5AK62 is a SIRIUS magnet coil for Size S3 contactors with spring-loaded connection technology. This part is flagged as a phased-out product. The official successor is the SIRIUS 3RT2 series. For a BOM freeze or last-time-buy planning, the 3RT2 family is the drop-in replacement path. The coil draws 0.8 to 1.1 A at 50 Hz — that's the inrush current at pickup, not the holding current. The holding VA is lower, but the pick-up surge is what stresses the control transformer. If you're replacing a coil in an existing SIRIUS Size S3 contactor, the spring-loaded terminals accept the same wire range as the original screw terminals, so no re-termination needed. The 110 V AC / 120 V AC dual-frequency rating means it works on 50 Hz or 60 Hz supply without a separate tap change. ## Comparison to the 3RT1017-1AK61 The 3RT1017-1AK61 is a complete power contactor (Size S00), not just a coil. The 3RT1944-5AK62 coil will not drop into a panel wired for the 3RT1017-1AK61 without changing the contactor base and rewiring the control circuit.","metaTitle":"Siemens 3RT1944-5AK62 SIRIUS Magnet Coil, 110 VAC 50 Hz / 12","metaDescription":"Siemens SIRIUS 3RT1944-5AK62 magnet coil for Size S3 contactors, 110 VAC 50 Hz / 120 V 60 Hz. 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":{"at 50 Hz":"0.8 ... 1.1","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil","at 50 Hz rated value":"110 V","at 60 Hz rated value":"120 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=312331&mlfb=3RT1944-5AK62","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1944-5AK62/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1944-5AK62?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the rated voltage of 3RT1944-5AK62?","answer":"110 V AC at 50 Hz and 120 V AC at 60 Hz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1944-5AK62","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/3RT1944-5AK62 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}}