{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5945-5AQ01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5945-5AQ01","canonicalUrl":"https://aoctrl.com/siemens/3RT5945-5AQ01","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5945-5AQ01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT5945-5AQ01 magnet coil, AC control supply voltage, rated 380 V at 50 Hz, tolerance band 0.8... 1.1, current production lifecycle stage.","salesMarkdown":"The Siemens SIRIUS 3RT5945-5AQ01 is a replacement magnet coil for contactors in the SIRIUS platform, designed for AC control supply voltage at 380 V rated value at 50 Hz. The coil's operating tolerance band of 0.8... 1.1 at 50 Hz means it will reliably pick up and hold across a voltage range of roughly 304 V to 418 V — a margin that covers typical line sag without nuisance dropout. ## Panel Integration As a SIRIUS-series magnet coil, the 3RT5945-5AQ01 mounts directly onto the contactor armature — no separate DIN-rail footprint. The AC coil draws its control voltage from the contactor's coil terminals; verify the control transformer is sized for the inrush VA of the specific contactor frame this coil drives. The 0.8... 1.1 tolerance band at 50 Hz ensures reliable operation even on lightly loaded control transformers where voltage may sag during simultaneous pickup of multiple contactors.","metaTitle":"3RT5945-5AQ01 SIRIUS Magnet Coil, 380 V AC 50 Hz, Current Pr","metaDescription":"Siemens SIRIUS 3RT5945-5AQ01 replacement magnet coil for contactors. Rated 380 V AC at 50 Hz, 0.8...1.1 tolerance band. Current production. 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":"380 V","Type Of Voltage Of The Control Supply Voltage":"AC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/62a4c4acecfa3c5ba81b8a29bc2cce7e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580095&mlfb=3RT5945-5AQ01","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5945-5AQ01/alternatives.json"},"ai":{"faq":[{"question":"What is the operating voltage tolerance for 3RT5945-5AQ01?","answer":"The coil has a tolerance band of 0.8... 1.1 at 50 Hz, meaning it operates reliably from approximately 304 V to 418 V AC."},{"question":"Where can I buy 3RT5945-5AQ01?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3RT5945-5AQ01 drop into a panel specified around 3RH2122-2AV00?","answer":"No — 3RT5945-5AQ01 is a magnet coil for a power contactor, while 3RH2122-2AV00 is an auxiliary contactor. They are not mechanically interchangeable; the coil mounts to its specific contactor frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5945-5AQ01","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/3RT5945-5AQ01 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}}