{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9978-0BL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9978-0BL20","canonicalUrl":"https://aoctrl.com/siemens/3VA9978-0BL20","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9978-0BL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON shunt trip auxiliary release, 380-600 VAC 50/60 Hz, 40 VA, 3 slots, for 3VA4/5/6 molded case circuit breakers.","salesMarkdown":"The Siemens SENTRON 3VA9978-0BL20 is a shunt trip auxiliary release for remote tripping of 3VA5 and 3VA6 molded case circuit breakers. It operates on a 380-600 VAC supply at 50/60 Hz, drawing up to 40 VA apparent power. The three-slot design occupies the accessory bay on the left side of the breaker. The 10 mm stripped length on the terminals matches standard ferrule sizing for panel wiring — no special crimp tool needed. At 65.1 mm high, 25.7 mm wide, and 31.2 mm deep, this shunt trip nests inside the breaker's accessory compartment without increasing the overall mounting footprint. The breaker itself occupies the same DIN-rail or screw-mount position whether the shunt trip is installed or not.","metaTitle":"Siemens 3VA9978-0BL20 Shunt Trip, 380-600 VAC, 3 Slots","metaDescription":"Siemens SENTRON 3VA9978-0BL20 shunt trip auxiliary release for 3VA4/5/6 breakers. 380-600 VAC 50/60 Hz, 40 VA, 4 kV surge. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"31.2 mm","Width":"25.7 mm","title":"3VA9978-0BL20","Height":"65.1 mm","Maximum":"16","Minimum":"20","Accessories":"Auxiliary release","description":"shunt trip left 380-600V AC 50/60Hz 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","Apparent Power Consumption / Maximum":"40 VA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ce58bfe413094e97b52f51ec8f0b9d78.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=650545&mlfb=3VA9978-0BL20"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9978-0BL20","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/3VA9978-0BL20 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}}