{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9978-0BD11","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9978-0BD11","canonicalUrl":"https://aoctrl.com/siemens/3VA9978-0BD11","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9978-0BD11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON universal auxiliary release, 12 V DC, 3 slots, 28.8 mm depth, 25.7 mm width, 65.1 mm height, for 3VA4/5/6 circuit breakers.","salesMarkdown":"The Siemens SENTRON 3VA9978-0BD11 is a universal auxiliary release designed as an accessory for the 3VA4, 3VA5, and 3VA6 molded-case circuit breaker families. It operates on a 12 V DC control supply and draws a maximum active power of 20 W. The release occupies 3 slots in the breaker accessory bay and measures 28.8 mm deep, 25.7 mm wide, and 65.1 mm high. Stripped length for the connection wire is 10 mm (0.4 in). ## Integration Notes Mounts into the accessory slot of 3VA4, 3VA5, or 3VA6 breakers — no additional DIN-rail space required. The 12 V DC control supply must be stable within the release's tolerance; verify the power supply's ripple and sag characteristics against the 20 W maximum draw.","metaTitle":"Siemens 3VA9978-0BD11 SENTRON Auxiliary Release, 12 V DC, 3","metaDescription":"Siemens SENTRON 3VA9978-0BD11 universal auxiliary release for 3VA4/5/6 breakers. 12 V DC, 20 W max, 690 V rated insulation, 4 kV surge. Active production. Order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"28.8 mm","Width":"25.7 mm","title":"3VA9978-0BD11","Height":"65.1 mm","Accessories":"Auxiliary release","description":"universal release 12V DC accessory for: 3VA4/5/6","Number Of Slots":"3","Product version":"Auxiliary release","Stripped Length":"10 mm","lifecycle_stage":"current","Product Brand Name":"SENTRON","Degree of pollution":"3","Product Designation":"Accessories","Overvoltage category":"III","Stripped Length [In]":"0.4 in","Surge Voltage Resistance":"4 kV","Tension assignée d'isolement Ui":"690 V","control supply voltage (Us) / at DC":"12V","Type of auxiliary circuit connection":"AWG18 / 750 mm","consumed active power / at DC / maximum":"20 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bf655a91429c950ea573515f068bd80e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=650537&mlfb=3VA9978-0BD11"},"ai":{"faq":[{"question":"Where can I buy 3VA9978-0BD11 and how do I get a price?","answer":"The 3VA9978-0BD11 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing; lead time and stock are confirmed at quote time."},{"question":"What is 3VA9978-0BD11's listed depth?","answer":"The listed depth is 28.8 mm."},{"question":"What is 3VA9978-0BD11's listed width?","answer":"The listed width is 25.7 mm."},{"question":"What compliance documentation does Siemens provide for 3VA9978-0BD11?","answer":"The part carries overvoltage category III and pollution degree 3 ratings per IEC standards. Specific compliance documentation (RoHS, REACH, UL, IEC) is typically included with the product or available from Siemens upon request; verify with your distributor at time of order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9978-0BD11","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/3VA9978-0BD11 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}}