{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9978-0BL31","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9978-0BL31","canonicalUrl":"https://aoctrl.com/siemens/3VA9978-0BL31","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9978-0BL31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON shunt trip (auxiliary release), 48-60 V AC 50/60 Hz / DC, 30 VA / 30 W, 4 kV surge, for 3VA4/5/6 breakers, 3VA9978-0BL31.","salesMarkdown":"The Siemens 3VA9978-0BL31 is a SENTRON shunt trip — an auxiliary release that sits in the left accessory slot of 3VA4, 3VA5, and 3VA6 molded-case circuit breakers. That's your emergency-stop or undervoltage-release circuit sorted without a separate contactor. The coil draws 30 VA apparent (30 W active at DC), which is the load the control transformer or power supply has to handle. At 48 V that's about 0.63 A; at 60 V about 0.5 A. This is a snap-in accessory for the left side of 3VA4/5/6 breakers. The breaker's own DIN-rail mount carries it; no extra panel space needed. The 10 mm stripped length on the wiring terminals matches standard ferrule or solid-wire prep for the control circuit.","metaTitle":"Siemens 3VA9978-0BL31 SENTRON Shunt Trip, 48-60V AC/DC","metaDescription":"Siemens SENTRON shunt trip accessory for 3VA4/5/6 breakers. 48-60V AC/DC, 4 kV surge, 30 VA. 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":"3VA9978-0BL31","Height":"65.1 mm","Maximum":"16","Minimum":"20","Accessories":"Auxiliary release","description":"shunt trip left 48-60V AC 50/60Hz/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","Apparent Power Consumption / Maximum":"30 V·A","consumed active power / at DC / maximum":"30 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b6fb972f419ca9b6c732f0559a0f4e7c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=650547&mlfb=3VA9978-0BL31"},"ai":{"faq":[{"question":"What is 3VA9978-0BL31 used for?","answer":"It's a shunt trip (auxiliary release) that mounts in the left accessory slot of Siemens 3VA4, 3VA5, and 3VA6 molded-case circuit breakers. Applying 48–60 V AC/DC trips the breaker remotely — used for emergency-stop circuits, undervoltage releases, or remote load shedding."},{"question":"Where can I buy 3VA9978-0BL31?","answer":"Sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9978-0BL31","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/3VA9978-0BL31 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}}