{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1921-1MA00-0FJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1921-1MA00-0FJ0","canonicalUrl":"https://aoctrl.com/siemens/3RV1921-1MA00-0FJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1921-1MA00-0FJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens, alarm switch, 3RV1921-1MA00-0FJ0, for circuit-breaker size S0...S3, lifecycle stage current.","salesMarkdown":"The Siemens 3RV1921-1MA00-0FJ0 is an alarm switch designed for use with circuit-breaker sizes S0 through S3 from the Benedikt & Jaeger range. It signals the tripped or switched state of the breaker, giving the panel a remote indication without running separate sense wires into the breaker enclosure. Mounts directly onto the S0, S1, S2, or S3 frame of the circuit breaker — no additional bracket or adapter needed. The switch mechanism engages with the breaker's internal trip indicator, so wiring it into the control circuit gives the PLC or annunciator a clean dry-contact signal on fault.","metaTitle":"Siemens 3RV1921-1MA00-0FJ0 Alarm Switch, S0..S3, Current Lif","metaDescription":"Siemens 3RV1921-1MA00-0FJ0 alarm switch for circuit-breaker sizes S0 through S3. Lifecycle stage current. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"lifecycle_stage":"current"}},"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=100779&mlfb=3RV1921-1MA00-0FJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1921-1MA00-0FJ0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RV1921-1MA00-0FJ0 used for?","answer":"It is an alarm switch that mounts on circuit-breaker sizes S0 through S3 to provide a remote electrical signal when the breaker trips or is manually switched."},{"question":"Where can I buy the 3RV1921-1MA00-0FJ0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1921-1MA00-0FJ0","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/3RV1921-1MA00-0FJ0 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}}