{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF3320-1DA04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF3320-1DA04","canonicalUrl":"https://aoctrl.com/siemens/3RF3320-1DA04","factsUrl":"https://aoctrl.com/api/mcp/products/3RF3320-1DA04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RF33 solid-state contactor, 1-pole, 3RF3320-1DA04, AC-1 / 20 A / 40 °C, 48-460 V load voltage, 24 V DC control, screw terminals, short-circuit-proof with B miniature circuit breaker.","salesMarkdown":"The Siemens 3RF3320-1DA04 is a 1-pole SIRIUS 3RF33 solid-state contactor rated for AC-1 resistive loads at 20 A and 40 °C ambient, with a load voltage range of 48-460 V and a 24 V DC control voltage. It is designed for switching resistive heating elements, lighting banks, or other non-inductive loads where silent, wear-free switching matters — no coil hum, no contact bounce, no arcing. The screw terminals make it straightforward to wire in a panel; the 24 V DC control side is common in PLC-driven cabinets. The part is listed as short-circuit-proof when paired with a B-curve miniature circuit breaker, which simplifies protection coordination — you don't need to oversize the breaker to handle inrush, because solid-state switching has none. That B-curve MCB covers the semiconductor's fault current capability without nuisance tripping on normal operation. RoHS compliance is confirmed since January 2024, and REACH Article 33 declares lead (CAS 7439-92-1) above 0.1% w/w in the current candidate list. For a BOM freeze or compliance audit, that lead declaration means the part carries the standard EU substance notification — it does not block sale but must be documented in the supply chain. ## What the AC-1 rating means for fit If you are switching motor loads (AC-3 or AC-4), the current must be derated significantly; this 1-pole solid-state contactor is not a general-purpose motor starter. The 48-460 V load voltage range covers common single-phase line voltages from 48 V control circuits up to 460 V industrial supplies. The 24 V DC control voltage is standard for modern PLC outputs; the solid-state input draws minimal current and has no coil to hold in, so it is compatible with low-current digital outputs from a controller. No suppression diode needed across the control terminals — there is no inductive kickback from a coil. Packaged at 105 x 27 x 122 mm, this single-pole contactor snaps onto a DIN rail — standard TS35 profile. The 27 mm width means it takes up one standard modular device slot on the rail, leaving room for the associated B-curve MCB alongside.","metaTitle":"3RF3320-1DA04 SIRIUS 3RF33 Solid-State Contactor, 20 A AC-1","metaDescription":"Siemens SIRIUS 3RF3320-1DA04 solid-state contactor, 1-pole, 20 A AC-1 at 40 °C, 48-460 V load, 24 V DC control. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"title":"3RF3320-1DA04","Group Code":"R711","description":"solid-state contactor 1-pole 3RF3 AC-1 / 20 A / 40 °C 48-460 V / 24 V DC short-circuit-proof 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/ca7b1a4febe0f5bb4f380c9403f4c995.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RF3320-1DA04?tree=CatalogTree"},"ai":{"faq":[{"question":"What load types is this contactor rated for?","answer":"It is rated for AC-1 resistive loads at 20 A and 40 °C ambient. That covers resistive heating, lighting, and other non-inductive loads. For inductive or motor loads, a different contactor family (AC-3 rated) would be needed."},{"question":"What control voltage does it use?","answer":"The control voltage is 24 V DC. The solid-state input is compatible with standard PLC digital outputs and draws minimal current — no coil holding current."},{"question":"What compliance documentation is available?","answer":"RoHS compliance is confirmed effective January 2024. REACH Article 33 declares lead (CAS 7439-92-1) above 0.1% w/w in the candidate list. Export control is AL: N / ECCN: 9N9999."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF3320-1DA04","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/3RF3320-1DA04 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}}