{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RQ4052-1SM40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RQ4052-1SM40","canonicalUrl":"https://aoctrl.com/siemens/3RQ4052-1SM40","factsUrl":"https://aoctrl.com/api/mcp/products/3RQ4052-1SM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RQ4 coupling relay, narrow design, output optocoupler 3RQ4052-1SM40, 24 V DC, 1 NO contact, screw terminal, 6.2 mm width, thermal current 3 A.","salesMarkdown":"The Siemens 3RQ4052-1SM40 is an output optocoupler relay from the SIRIUS 3RQ4 family of narrow-design coupling relays. It switches a single normally-open (NO) contact rated for a thermal current of 3 A, controlled by a 24 V DC input. The 6.2 mm width is the key space-saving feature — it packs into a dense DIN-rail terminal block arrangement where every millimeter of panel width matters. The 3 A thermal current (Ith) is the continuous current the NO contact can carry in free air at 40 °C ambient. For switching inductive loads like small contactor coils or solenoid valves, derate to roughly 1.5–2 A depending on the load power factor and switching frequency. The 24 V DC input is the control side — it powers the internal LED that drives the optocoupler output, providing galvanic isolation between the PLC or controller output and the switched circuit. The 6.2 mm housing width matches the standard SIRIUS 3RQ4 footprint, so it occupies one slot on a DIN-rail terminal block assembly. No special tooling needed — a standard slotted screwdriver for the terminals and a flat-blade for the DIN-rail clip. RoHS compliant since 26 September 2024. Export classification is AL: N / ECCN: EAR99, meaning no special export licensing for most destinations.","metaTitle":"Siemens 3RQ4052-1SM40 SIRIUS 3RQ4 Coupling Relay, 24 V DC, 3","metaDescription":"Siemens 3RQ4052-1SM40 SIRIUS 3RQ4 output optocoupler relay, 24 V DC coil, 1 NO contact, 3 A thermal current, 6.2 mm wide, screw terminal. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"title":"3RQ4052-1SM40","Group Code":"R711","description":"output optocoupler, 24 V DC, 1 NO contact, screw terminal, width 6.2 mm, thermal current 3 A","Product Group":"4950","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 3RQ4 coupling relays, narrow design","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : EAR99","Packaging dimensions (L x W x H)":"95.00 x 93.00 x 65.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 26-09-24","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/08901043687c69b658274f854ea5b0b0.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RQ4052-1SM40?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 4950. These are Siemens internal classification codes used for catalog sorting and cross-referencing."},{"question":"What compliance documentation is available for this part?","answer":"The part is RoHS compliant since 26 September 2024. It also has a REACH Article 33 disclosure for lead (CAS 7439-92-1) above 0.1% w/w. Export control is AL: N / ECCN: EAR99."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RQ4052-1SM40","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/3RQ4052-1SM40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}