{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1951-1TA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1951-1TA11","canonicalUrl":"https://aoctrl.com/siemens/3RH1951-1TA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1951-1TA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1951-1TA11 auxiliary contact block, 1 NO + 1 NC, side-mounted for 3RT135/136/137 contactors, screw terminal.","salesMarkdown":"The Siemens 3RH1951-1TA11 is a side-mounted auxiliary contact block for the SIRIUS 3RT.3 contactor family, specifically the 3RT135, 3RT136, and 3RT137 frames rated up to 525 A. It provides one normally-open and one normally-closed contact pair via screw terminals. ## Integration Note Mounts on the side of the contactor, not the front. The screw terminals accept standard wire sizes for 24 VDC or 120 VAC control circuits typical in motor starter assemblies. The 1 NO + 1 NC configuration covers a feedback signal and a permissive interlock in one block.","metaTitle":"Siemens 3RH1951-1TA11 Auxiliary Contact Block, 1NO+1NC, Scre","metaDescription":"Siemens SIRIUS 3RH1951-1TA11 auxiliary contact block, 1 NO + 1 NC, side-mounted for 3RT135/136/137 contactors. Screw terminals. RoHS compliant since 2017-03-27. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"title":"3RH1951-1TA11","Group Code":"R711","description":"Auxiliary contact block for 3RT135, 3RT136, 3RT137 1 NC 1 NO, can be mounted on the side, screw terminal","Product Group":"5805","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 3RT.3 contactors, 4-pole, up to 525 A","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","Packaging dimensions (L x W x H)":"50.00 x 70.00 x 10.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 27-03-17","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/56f7bb2103fddf898f0d9a908ce07d29.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RH1951-1TA11?tree=CatalogTree"},"ai":{"faq":[{"question":"What contactors does this block fit?","answer":"It side-mounts on Siemens SIRIUS 3RT135, 3RT136, and 3RT137 contactors, which are 4-pole frames within the 3RT.3 family rated up to 525 A."},{"question":"What compliance documentation is available?","answer":"RoHS compliance is confirmed effective 27 March 2017. REACH Article 33 candidate-list information is available per the manufacturer's disclosure. Export control is AL: N / ECCN: N."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1951-1TA11","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/3RH1951-1TA11 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}}