{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF3340-1DA04-0KN0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF3340-1DA04-0KN0","canonicalUrl":"https://aoctrl.com/siemens/3RF3340-1DA04-0KN0","factsUrl":"https://aoctrl.com/api/mcp/products/3RF3340-1DA04-0KN0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RF33 solid-state contactor, 1-pole, AC-1 40 A at 40 °C, 48-460 V load, 24 V DC control, screw terminal, 3RF3340-1DA04-0KN0.","salesMarkdown":"## What the AC-1 rating tells you The 3RF3340-1DA04-0KN0 is a 1-pole solid-state contactor from the Siemens SIRIUS 3RF33 family, rated for 40 A in AC-1 duty (resistive loads) at 40 °C ambient. That 40 A figure applies to resistive heating or lighting banks where inrush stays under 1.5× steady-state. For motor or transformer loads (AC-3/AC-4), the allowable current drops significantly — the part's data sheet derating curve governs that choice. The load voltage range spans 48 to 460 V AC, making it suitable for 400 V three-phase lines common in European panel builds. ## Short-circuit protection and coordination Siemens specifies this contactor as short-circuit-proof up to 25 A when protected by a B-curve miniature circuit breaker. That coordination means the MCB clears a fault before the SSR's semiconductor junction sees destructive energy — a critical detail for panel builders sizing the upstream protective device. ## Control voltage and wiring The control input is 24 V DC — a standard PLC-level signal that avoids the coil hold-in issues of AC-operated contactors. Screw terminals on both power and control sides simplify panel wiring; no special tools beyond a screwdriver are needed. The unit ships as a single piece (1 piece per package) with dimensions 105 x 27 x 122 mm, sized for a standard DIN-rail footprint alongside other SIRIUS modular components.","metaTitle":"Siemens 3RF3340-1DA04-0KN0 SIRIUS 3RF33 solid-state contacto","metaDescription":"Siemens 3RF3340-1DA04-0KN0 solid-state contactor, 1-pole, AC-1 40 A at 40 °C, 48-460 V, 24 V DC control. Active production. RoHS since 15-01-24, REACH lead >0.1%.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"title":"3RF3340-1DA04-0KN0","Group Code":"R711","description":"solid-state contactor 1-pole 3RF3 AC-1 / 40 A / 40 °C 48-460 V / 24 V DC low power short-circuit-proof up to 25 A with B miniature circuit breaker screw terminal","Product Group":"3725","Product class":"A: Standard product which is a stock item could be returned within the returns guidelines/period.","Quantity Unit":"1 Piece","Product Family":"SIRIUS 3RF33 solid-state contactors, 1-pole","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : 9N9999","Packaging dimensions (L x W x H)":"105.00 x 27.00 x 122.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 15-01-24","REACH Art. 33 Duty to inform according to the current list of candidates":"Lead CAS-No. 7439-92-1 > 0,1 % (w / w)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb5a7b3f6447f6ab28ffc8d0d6f9a463.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RF3340-1DA04-0KN0?tree=CatalogTree"},"ai":{"faq":[{"question":"What is the group code and product group for this part?","answer":"The group code is R711 and the product group is 3725 — these are Siemens internal cataloging references used for cross-referencing within the SIRIUS family."},{"question":"What compliance documentation is available for this contactor?","answer":"The part is RoHS compliant since 15 January 2024. A REACH Article 33 declaration is published noting lead content above 0.1% by weight (CAS 7439-92-1). Export control classification is AL: N / ECCN: 9N9999."},{"question":"What is the maximum resistive load current at 40 °C ambient?","answer":"The AC-1 rating is 40 A at 40 °C ambient for resistive loads. This is the headline thermal current; derating applies for higher ambients or for inductive/motor loads (AC-3/AC-4 duty cycles)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF3340-1DA04-0KN0","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/3RF3340-1DA04-0KN0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}