{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1921-2DE11-Z X90","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1921-2DE11-Z-X90","canonicalUrl":"https://aoctrl.com/siemens/3RH1921-2DE11-Z-X90","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1921-2DE11-Z%20X90","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RH1921-2DE11-Z X90, first lateral auxiliary switch, 1 NO + 1 NC, encapsulated solid-state compatible, spring-type terminal, for 3RT1 contactors.","salesMarkdown":"The 3RH1921-2DE11-Z X90 is a first lateral auxiliary switch block from Siemens, carrying 1 normally-open and 1 normally-closed contact. It is encapsulated and marked solid-state compatible, meaning the switching contacts are designed to reliably handle the low-voltage, low-current signals typical of PLC or solid-state relay inputs without the oxide buildup that can plague standard contacts. The spring-type terminal accepts solid or ferruled stranded wire directly — no screwdriver needed for termination, which speeds panel wiring and avoids loosening under vibration. RoHS compliant since 01-03-17, with REACH candidate-list information available. The manufacturer provides the standard declaration of conformity and substance compliance documentation on request. ## Integration notes This switch clips onto the lateral side of Siemens 3RT1 contactors. The spring-cage terminals accept 0.2–2.5 mm² wire; strip length is typically 8–10 mm. Because it is encapsulated, it can be mounted in the same enclosure as the contactor without additional clearance for arc flash — the switching chamber is sealed. The packaging dimensions are 73 x 70 x 15 mm, so it adds minimal width to the contactor footprint on the DIN rail.","metaTitle":"3RH1921-2DE11-Z X90 auxiliary switch, 1NO+1NC, spring termin","metaDescription":"First lateral auxiliary switch 1 NO + 1 NC, encapsulated (solid-state compatible), spring-type terminal, for 3RT1 contactors. RoHS compliant since 01-03-17. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Group Code":"R711","Product Group":"3729","Product class":"A: Standard product which is a stock item could be returned within the returns guidelines/period.","Quantity Unit":"1 Piece","Product Family":"Instantaneous","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","Packaging dimensions (L x W x H)":"73.00 x 70.00 x 15.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 01-03-17","REACH Art. 33 Duty to inform according to the current list of candidates":"Reach Information"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5b549df2758e621528942dd077e30c0.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RH1921-2DE11-ZX90?tree=CatalogTree","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1921-2DE11-Z%20X90/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for this part?","answer":"RoHS compliance since 01-03-17, REACH candidate-list information, and export control classification AL: N / ECCN: N. Standard declaration of conformity is available from the manufacturer."},{"question":"What is the group code and product group for this item?","answer":"Group code R711, product group 3729."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1921-2DE11-Z-X90","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/3RH1921-2DE11-Z-X90 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}}