{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9908-0BB12","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9908-0BB12","canonicalUrl":"https://aoctrl.com/siemens/3VA9908-0BB12","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9908-0BB12","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON auxiliary release, 48 V DC undervoltage release, for 3VA1 and 3VA20 up to 3VA25 molded-case breakers, 28.8 mm depth, 4 kV surge voltage resistance.","salesMarkdown":"## Undervoltage release for SENTRON 3VA breakers The Siemens 3VA9908-0BB12 is a SENTRON-branded undervoltage release accessory designed specifically for the 3VA1 and 3VA20 through 3VA25 series of molded-case circuit breakers. Rated for 48 V DC operation, the release draws a maximum of 2.5 W under steady-state DC conditions. That means it's designed for the fixed-installation environment inside a distribution panel where transient overvoltages from the mains are expected and conductive pollution (dust, condensation) is possible — typical for industrial switchgear rooms. The accessory occupies three slots in the breaker's accessory compartment. Physical dimensions are 65.1 mm high, 25.7 mm wide, and 28.8 mm deep — the depth is the critical dimension when checking clearance inside the enclosure door or against a rear-mounted busbar. Wiring termination requires a 10 mm strip length (0.4 in) on the conductor. That's a standard measurement for cage-clamp or screw terminals in this class — set your wire stripper to 10 mm and no more; over-stripping leaves bare conductor exposed past the terminal entry.","metaTitle":"Siemens 3VA9908-0BB12 SENTRON Undervoltage Release, 48 V DC","metaDescription":"Siemens 3VA9908-0BB12 SENTRON undervoltage release accessory for 3VA1 and 3VA20-3VA25 breakers. 48 V DC coil, 4 kV surge rating, active production. Available to order against 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":"3VA9908-0BB12","Height":"65.1 mm","Maximum":"16","Minimum":"20","Accessories":"Auxiliary release","description":"UNDERVOLTAGE RELEASE 48 V DC ACCESSORY FOR 3VA1 and 3VA20 up to 3VA25","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","consumed active power / at DC / maximum":"2.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/16b87f638ed2b868b96d08b58ca3d430.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=43324&mlfb=3VA9908-0BB12"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3VA9908-0BB12?","answer":"As a SENTRON accessory for IEC/UL-rated breakers, the 3VA9908-0BB12 is designed for overvoltage category III and degree of pollution 3 environments, with a 4 kV surge voltage resistance rating. Standard Siemens documentation includes the product's CE declaration and RoHS/REACH compliance statements available through the manufacturer's support portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9908-0BB12","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/3VA9908-0BB12 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}