{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RQ4052-1SM50","brand":"Siemens","brandSlug":"siemens","productSlug":"3RQ4052-1SM50","canonicalUrl":"https://aoctrl.com/siemens/3RQ4052-1SM50","factsUrl":"https://aoctrl.com/api/mcp/products/3RQ4052-1SM50","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RQ4 coupling relay, output optocoupler, 24 V DC coil, 1 NO contact, 2 A thermal current, 6.2 mm width, screw terminal.","salesMarkdown":"The Siemens 3RQ4052-1SM50 is an output optocoupler relay from the SIRIUS 3RQ4 family of coupling relays in a narrow 6.2 mm housing. It provides galvanic isolation between a 24 V DC control signal and a single normally-open (NO) contact rated for a thermal current of 2 A, terminated via screw terminals. This form factor is designed for dense DIN-rail mounting in control panels where space is at a premium — the 6.2 mm width allows high channel counts per linear meter of rail. The optocoupler input means the coil side draws minimal current from the 24 V DC supply, making it suitable for PLC digital output cards with limited per-channel drive capability. ## Compliance and regulatory documentation The 3RQ4052-1SM50 is RoHS compliant since 26 September 2024, and carries a REACH Article 33 duty-to-inform notification for lead (CAS 7439-92-1) above 0.1% w/w in the product. ## Integration notes for the controls engineer The 6.2 mm width and screw terminal design suit panel layouts where terminal-block density is already high. The 24 V DC coil operates from standard PLC output voltages, and the 2 A thermal current rating covers signal-level switching for solenoid valves, contactor coils, and indicator loads within that current envelope. Because it is an optocoupler relay, there is no mechanical coil to wear out — switching life is effectively limited by the output contact rating. For cold-storage or refrigeration panel environments, the sealed optocoupler input side avoids condensation issues that can plague electromechanical relay coils in sub-zero enclosures.","metaTitle":"Siemens 3RQ4052-1SM50 SIRIUS 3RQ4 Coupling Relay, 24 V DC, 2","metaDescription":"Siemens 3RQ4052-1SM50 SIRIUS 3RQ4 output optocoupler relay, 24 V DC, 1 NO contact, 2 A thermal current, 6.2 mm wide, screw terminal. Active production, RoHS compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"title":"3RQ4052-1SM50","Group Code":"R711","description":"output optocoupler, 24 V DC, 1 NO contact, screw terminal, width 6.2 mm, thermal current 2 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/a946b8924437f1794f9ac8eba55bff84.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RQ4052-1SM50?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this part?","answer":"The part is RoHS compliant since 26 September 2024 and carries a REACH Article 33 notification for lead content above 0.1% w/w. Export classification is AL: N / ECCN: EAR99."},{"question":"What is the group code and product group for this order code?","answer":"The group code is R711 and the product group is 4950, which are Siemens internal classification codes used for catalog and ordering system identification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RQ4052-1SM50","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/3RQ4052-1SM50 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}}