{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1921-1DA11-0KR0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1921-1DA11-0KR0","canonicalUrl":"https://aoctrl.com/siemens/3RH1921-1DA11-0KR0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1DA11-0KR0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 1NO+1NC, side-mount, screw terminal, Size S0...S12, 3RH1921-1DA11-0KR0.","salesMarkdown":"This is a Siemens SIRIUS auxiliary switch block, order code 3RH1921-1DA11-0KR0, with one normally-open and one normally-closed contact. It mounts laterally on contactors in the Size S0 through S12 frame range, using the EN 50012 interface. The 10 mm screw terminals accept standard panel wiring. ## Lifecycle and replacement The manufacturer lists this part as a phased-out product. The official successor is the SIRIUS 3RH2 series.","metaTitle":"Siemens 3RH1921-1DA11-0KR0 Auxiliary Switch Block, 1NO+1NC,","metaDescription":"Siemens 3RH1921-1DA11-0KR0 auxiliary switch block, 1NO+1NC, side-mount, screw terminal, for contactors Size S0...S12. Phased-out; successor SIRIUS 3RH2. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Part #":"3RH1921-1DA11-0KR0","Weight":"1.36 kgs","Category":"Contactors and Starters","Sub Category":"Electrical Contactors","Top Category":"Circuit Breakers, Fuses & Protection","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$41.58","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=33526&mlfb=3RH1921-1DA11-0KR0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1DA11-0KR0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1921-1DA11-0KR0?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What replaces 3RH1921-1DA11-0KR0?","answer":"The official successor is the SIRIUS 3RH2 series, which uses the same mounting footprint and contact configuration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1921-1DA11-0KR0","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/3RH1921-1DA11-0KR0 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}}