{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1900-1A","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1900-1A","canonicalUrl":"https://aoctrl.com/siemens/3RU1900-1A","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1900-1A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, mechanical RESET accessory, 3RU1900-1A, for 3RU11/3RB20/3RB21 overload relays sizes S00...S3, includes resetting plunger, holder and funnel.","salesMarkdown":"The Siemens 3RU1900-1A is a mechanical RESET accessory for the SIRIUS 3RU11 and 3RB20/3RB21 overload relay family. It includes a resetting plunger, holder, and funnel, and covers frame sizes S00, S0, S2, and S3. This part is a phased-out product. The official Siemens successor is the SIRIUS 3RU2 series, with preferred replacement order codes 3RU2900-1A or 3RB3980-1A. The 3RU1900-1A is marked as a phased-out product. For new builds or BOM revisions, the direct drop-in replacement path is the 3RU2900-1A. ## Environmental ratings These cover most panel environments, including unheated warehouses.","metaTitle":"Siemens 3RU1900-1A SIRIUS Mechanical Reset, Phased Out","metaDescription":"Siemens 3RU1900-1A SIRIUS mechanical reset accessory for 3RU11/3RB20/3RB21 overload relays, sizes S00-S3. Phased-out product; successor is 3RU2900-1A. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"title":"3RU1900-1A","description":"Mechanical RESET for 3RU11/3RB20/3RB21 Size S00...S3! Phased-out product! Successor is SIRIUS 3RU2 Preferred successor type is >>3RU2900-1A or >>3RB3980-1A<<","During Storage":"-50 ... +80°C","lifecycle_stage":"current","During Operation":"-20 ... +70°C","Product Brand Name":"SIRIUS","Product Designation":"mechanical RESET","Design Of The Product":"resetting plunger, holder and funnel","Size Of Overload Relay":"S00, S0, S2, S3"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4a41dfc4e2c4539e8176e34d962f5462.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=69297&mlfb=3RU1900-1A"},"ai":{"faq":[{"question":"What is the closest functional replacement for 3RU1900-1A?","answer":"The official Siemens replacement is the 3RU2900-1A (or 3RB3980-1A). These are the preferred successor types for the phased-out 3RU1900-1A."},{"question":"What overload relays does the 3RU1900-1A fit?","answer":"It fits the SIRIUS 3RU11 and 3RB20/3RB21 overload relays in frame sizes S00, S0, S2, and S3."},{"question":"What are the temperature limits for storage and operation?","answer":"Storage temperature range is -50 to +80 °C; operating temperature range is -20 to +70 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1900-1A","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/3RU1900-1A 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}}