{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RQ4128-1AB30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RQ4128-1AB30","canonicalUrl":"https://aoctrl.com/siemens/3RQ4128-1AB30","factsUrl":"https://aoctrl.com/api/mcp/products/3RQ4128-1AB30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RQ4 coupling relay, 3RQ4128-1AB30, H-0-A coupler with plug-in relay, 24 V AC/DC, 1 change-over contact, screw terminal, 6.2 mm width, 6 A thermal current.","salesMarkdown":"The Siemens 3RQ4128-1AB30 is a SIRIUS 3RQ4 coupling relay in the narrow 6.2 mm housing. It's an H-0-A coupler with a plug-in relay, meaning it integrates a manual Hand-Off-Auto switch directly into the relay package — a common setup for local override of automated control signals in a panel. Rated for 24 V AC/DC coil supply and a thermal current of 6 A through its single change-over contact. RoHS compliant since 26 September 2024, with REACH Article 33 information available. No UL or CSA listing appears in the spec record, so if a panel requires those marks, verify the specific project's acceptance criteria before committing the BOM line. ## Integration Notes Screw terminal connections — strip length and torque per standard Siemens terminal specs for the 3RQ4 family. Plug-in relay base means the relay itself can be swapped without rewiring the base terminals.","metaTitle":"Siemens 3RQ4128-1AB30 SIRIUS 3RQ4 Coupling Relay, 24 V AC/DC","metaDescription":"Siemens 3RQ4128-1AB30 SIRIUS 3RQ4 coupling relay, 24 V AC/DC, 1 change-over contact, 6 A thermal current, screw terminal, 6.2 mm wide. Active production. RoHS compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"title":"3RQ4128-1AB30","Group Code":"R711","description":"H-0-A coupler with plug-in relay, 24 V AC/DC, 1 change-over contact, screw terminal, width 6.2 mm, thermal current 6 A, with H-0-A switch","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 : N","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":"Reach Information"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ed61afbd3830bf3b44f3783e4db16259.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RQ4128-1AB30?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this part?","answer":"RoHS compliance is confirmed since 26 September 2024. REACH Article 33 duty-to-inform information is available per the current candidate list. No UL, CSA, or IEC certification marks are listed in the spec record."},{"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-reference lookups."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RQ4128-1AB30","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/3RQ4128-1AB30 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}}