{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9978-0BL30","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9978-0BL30","canonicalUrl":"https://aoctrl.com/siemens/3VA9978-0BL30","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9978-0BL30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON shunt trip / auxiliary release, order code 3VA9978-0BL30, 24V AC 50/60Hz or 24-30V DC coil, 30 VA / 45 W, 4 kV surge, pollution degree 3, for 3VA4/5/6 breakers.","salesMarkdown":"## What this accessory does The Siemens 3VA9978-0BL30 is a SENTRON shunt trip (auxiliary release) designed to remotely trip a 3VA4, 3VA5, or 3VA6 molded-case circuit breaker on command. It mounts in one of the three accessory slots on the breaker's right side. The coil accepts 24 V AC at 50/60 Hz or 24–30 V DC, drawing 30 VA apparent power on AC or 45 W on DC. That draw matters for control-transformer sizing and DC-supply budgeting, especially if multiple shunt trips share one supply. ## Physical fit in the panel The shunt trip body measures 25.7 mm wide, 65.1 mm high, and 31.2 mm deep. Width corresponds to roughly 1.5 modular DIN-rail units — plan the gland-plate fill accordingly if it sits next to other 18 mm-wide modules. Strip the control wires to 10 mm (0.4 in) for the screw terminals. That's a standard length for cage-clamp or screw-clamp terminations on SENTRON accessories.","metaTitle":"Siemens 3VA9978-0BL30 SENTRON Shunt Trip, 24V AC/DC, 4 kV","metaDescription":"Siemens 3VA9978-0BL30 SENTRON shunt trip / auxiliary release for 3VA4/5/6 breakers. 24V AC 50/60Hz or 24-30V DC coil, 4 kV surge, pollution degree 3. Active production, sourced to","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":"3VA9978-0BL30","Height":"65.1 mm","Maximum":"16","Minimum":"20","Accessories":"Auxiliary release","description":"shunt trip left 24V AC 50/60Hz/24-30V DC accessory for: 3VA4/5/6","Number Of Slots":"3","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","Design Of The Product":"auxiliary release","Surge Voltage Resistance":"4 kV","Apparent Power Consumption / Maximum":"30 VA","consumed active power / at DC / maximum":"45 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2e2d442dbcad0c2cc4b53a4cbd910b1f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=650546&mlfb=3VA9978-0BL30"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9978-0BL30","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/3VA9978-0BL30 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}}