{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1945-5AN61","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1945-5AN61","canonicalUrl":"https://aoctrl.com/siemens/3RT1945-5AN61","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1945-5AN61","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS series, magnet coil, 200 V AC at 50 Hz / 220 V AC at 60 Hz, Size S3, screw terminal, AC control supply voltage.","salesMarkdown":"The Siemens SIRIUS 3RT1945-5AN61 is a magnet coil for Size S3 contactors, rated 200 V AC at 50 Hz and 220 V AC at 60 Hz. It draws 0.8 to 1.1 A at 50 Hz. This is a replacement coil — you swap it into an existing S3 contactor frame, not a standalone device. The control supply is AC only. The 0.8 to 1.1 A draw at 50 Hz tells you the coil's inrush and hold current — size your control transformer and fuse accordingly. AC coil means no polarity concerns, but you do need to verify the control voltage matches your panel's supply; a 24 V DC coil won't work here. ## Panel Integration Screw terminal connection, Size S3 contactor frame. Mounts on DIN rail via the contactor base. The coil plugs onto the contactor magnet stack — no wiring changes to the main power circuit.","metaTitle":"Siemens 3RT1945-5AN61 SIRIUS Magnet Coil, 200/220 V AC","metaDescription":"Siemens SIRIUS 3RT1945-5AN61 magnet coil for Size S3 contactors. 200 V AC at 50 Hz, 220 V AC at 60 Hz. 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":{"at 50 Hz":"0.8 ... 1.1","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Magnet coil","at 50 Hz rated value":"200 V","at 60 Hz rated value":"220 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=56665&mlfb=3RT1945-5AN61","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1945-5AN61/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1945-5AN61 and how do I get a price?","answer":"We source this phased-out coil to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"Will 3RT1945-5AN61 drop into a panel specified around 3RT1016-1AN22?","answer":"No. 3RT1016-1AN22 is a Size S00 power contactor, not a Size S3. The coil form factor and mounting are different. The 3RT1945-5AN61 fits only Size S3 contactor frames."},{"question":"What is the at 50 Hz rating on 3RT1945-5AN61?","answer":"The coil draws 0.8 to 1.1 A at 50 Hz. The rated voltage at 50 Hz is 200 V AC."},{"question":"What compliance documentation does Siemens provide for 3RT1945-5AN61?","answer":"As a SIRIUS product, standard documentation includes a CE declaration of conformity and RoHS compliance. Specific certificates (UL, CSA, IEC) are typically listed on the Siemens Industry Online Support portal for the SIRIUS series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1945-5AN61","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/3RT1945-5AN61 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}}