{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1924-5AH21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1924-5AH21","canonicalUrl":"https://aoctrl.com/siemens/3RT1924-5AH21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1924-5AH21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Magnet coil for contactors Size S0, 48 V AC 50/60 Hz, screw terminal, order code 3RT1924-5AH21.","salesMarkdown":"The Siemens SIRIUS 3RT1924-5AH21 is a magnet coil for Size S0 contactors, rated 48 V AC at both 50 Hz and 60 Hz. It snaps onto the contactor's coil terminals via screw connections — the same footprint as the standard S0 coil interface. ## Lifecycle reality — phased out, successor available This coil is a phased-out product. The official Siemens preferred successor is 3RT2924-5AH21, which drops into the same Size S0 contactor and shares the same 48 V AC 50/60 Hz coil rating. If you are stocking spares or filling a BOM line, the successor is a direct form-fit-function swap — no rewiring, no mounting change. ## Sourcing posture For the successor 3RT2924-5AH21, we can also quote that alongside the original code if you need a drop-in replacement for a BOM freeze.","metaTitle":"Siemens 3RT1924-5AH21 SIRIUS Magnet Coil, 48 V AC, 50/60 Hz","metaDescription":"Siemens SIRIUS 3RT1924-5AH21 magnet coil for Size S0 contactors, 48 V AC 50/60 Hz. Phased-out product; official successor is 3RT2924-5AH21. Sourced to order against RFQ. Contact fo","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":"48 V","at 60 Hz rated value":"48 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=101668&mlfb=3RT1924-5AH21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1924-5AH21/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RT1924-5AH21?","answer":"Siemens lists 3RT2924-5AH21 as the preferred successor type. It shares the same 48 V AC 50/60 Hz coil rating and the same Size S0 mounting interface — direct drop-in, no panel rework."},{"question":"How do I get current pricing and availability for 3RT1924-5AH21?","answer":"Submit an RFQ for this order code. We source it through independent distribution and confirm availability and current pricing at quote time. The successor 3RT2924-5AH21 can also be quoted alongside if needed."},{"question":"What compliance documentation does Siemens provide for 3RT1924-5AH21?","answer":"The coil carries Siemens SIRIUS branding and is designed for IEC/EN 60947-series applications. Specific RoHS, REACH, and UL documentation should be requested at quote time — the evidence does not list individual cert marks for this coil variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1924-5AH21","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/3RT1924-5AH21 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}}