{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1924-2B","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1924-2B","canonicalUrl":"https://aoctrl.com/siemens/3RA1924-2B","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1924-2B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA1924-2B mechanical locking device, for reversing starter size S0/S2/S3, lateral mounting, phased-out product with successor SIRIUS 3RA2.","salesMarkdown":"## What this mechanical interlock does in a reversing starter The 3RA1924-2B is a SIRIUS mechanical locking device that prevents simultaneous closure of two contactors in a reversing starter — the classic interlock that keeps forward and reverse contactors from pulling in together and shorting the phases. It mounts laterally on reversing starters in frame sizes S0, S2, and S3, and each contactor carries one NC auxiliary contact as part of the interlock circuit. ## Lifecycle reality — phased out, successor named Siemens lists this as a phased-out product. For BOM lines that still specify 3RA1924-2B, availability runs through independent distribution channels. Quantities are confirmed at RFQ; no stock-holding claim is made here. ## RoHS compliance date on record The substance prohibitance date is 07/01/2006, which aligns with the original EU RoHS directive effective date — the part meets the 2006 RoHS threshold for the six restricted substances.","metaTitle":"Siemens 3RA1924-2B SIRIUS mechanical locking device","metaDescription":"Siemens 3RA1924-2B SIRIUS mechanical interlock for reversing starters size S0/S2/S3, lateral mount. Phased-out product with successor 3RA2 series.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"title":"3RA1924-2B","description":"Mechanical interlocking for reversing starter for lateral mounting with each one auxiliary contact (1 NC per contactor) Size S0, S2, S3! Phased-out product! Successor is SIRIUS 3RA2","lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"Mechanical locking device","Design Of The Product":"for reversing starter size S0/S2/S3, can be mounted laterally","Substance Prohibitance (Date)":"07/01/2006"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$13.97","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bc19a65176bfa3c9d6346610877fe1ad.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=181023&mlfb=3RA1924-2B"},"ai":{"faq":[{"question":"What frame sizes does the 3RA1924-2B fit?","answer":"It fits reversing starters in frame sizes S0, S2, and S3, with lateral mounting. Each contactor in the reversing pair uses one NC auxiliary contact as part of the interlock circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1924-2B","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/3RA1924-2B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}