{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9978-0BD13","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9978-0BD13","canonicalUrl":"https://aoctrl.com/siemens/3VA9978-0BD13","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9978-0BD13","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON universal auxiliary release, 48V DC, for 3VA4/5/6 molded-case circuit breakers, 690 V rated insulation voltage, 4 kV surge resistance, overvoltage category III, degree of pollution 3, 3 slots, 28.8 x 25.7 x 65.1 mm.","salesMarkdown":"The Siemens SENTRON 3VA9978-0BD13 is a universal auxiliary release designed for the 3VA4, 3VA5, and 3VA6 series of molded-case circuit breakers. This release is intended for remote tripping applications — when the control voltage is applied, the release mechanism triggers the breaker, providing a means to disconnect the load from a central command or safety system. The 4 kV surge voltage resistance and overvoltage category III mean this release can handle transient overvoltages typical of fixed-installation distribution boards (per IEC 60947-1). The 20 W maximum DC power consumption is the coil's holding power — the release draws this only when energized to keep the trip mechanism ready. In a 24 VDC control loop, that is about 0.83 A; at 48 VDC it is about 0.42 A. The control transformer or power supply feeding the release must be sized to handle this continuous draw across all units in the panel. At 28.8 mm deep, 25.7 mm wide, and 65.1 mm tall, this release clips into the accessory slot on the side of a 3VA4/5/6 breaker. It occupies one of three available slots, so up to two more accessories (shunt trip, undervoltage release, auxiliary switch) can share the same breaker. The wire stripping length is 10 mm (0.4 in); the terminal accepts AWG18 or 750 mm² conductors. No DIN-rail space is consumed — the release is integrated into the breaker body itself.","metaTitle":"Siemens SENTRON 3VA9978-0BD13 Auxiliary Release, 48V DC, 690","metaDescription":"Siemens SENTRON 3VA9978-0BD13 universal auxiliary release for 3VA4/5/6 breakers. 48V DC, 690V rated insulation voltage, 4 kV surge, overvoltage cat III. Active production. Quoted o","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":"3VA9978-0BD13","Height":"65.1 mm","Accessories":"Auxiliary release","description":"universal release 48V DC accessory for: 3VA4/5/6","Number of slots":"3","Product version":"Auxiliary release","lifecycle_stage":"current","Product brand name":"SENTRON","Degree of pollution":"3","Product designation":"Accessories","Overvoltage category":"III","Wire stripping length":"10 mm","Surge voltage resistance":"4 kV","Wire stripping length [in]":"0.4 in","Rated insulation voltage Ui":"690 V","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/8f2f5692140ccd498a93b9d283be113a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=650539&mlfb=3VA9978-0BD13"},"ai":{"faq":[{"question":"What is the 3VA9978-0BD13 used for?","answer":"It is a universal auxiliary release that provides remote tripping for Siemens SENTRON 3VA4, 3VA5, and 3VA6 molded-case circuit breakers. When 48V DC is applied, the release mechanically trips the breaker, allowing a PLC, safety relay, or emergency-stop circuit to disconnect the load."},{"question":"What are the key specifications of 3VA9978-0BD13?","answer":"Rated insulation voltage 690 V, surge voltage resistance 4 kV, overvoltage category III, degree of pollution 3, 20 W DC power consumption, 3 accessory slots, dimensions 28.8 x 25.7 x 65.1 mm, wire stripping length 10 mm."},{"question":"Where can I buy 3VA9978-0BD13?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9978-0BD13","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/3VA9978-0BD13 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}}