{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM9908-0BB26","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM9908-0BB26","canonicalUrl":"https://aoctrl.com/siemens/3VM9908-0BB26","factsUrl":"https://aoctrl.com/api/mcp/products/3VM9908-0BB26","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, undervoltage release, 380-400V AC 50/60Hz, 2.5 VA, 3 slots, for 3VM breakers to 630A, order code 3VM9908-0BB26.","salesMarkdown":"The Siemens 3VM9908-0BB26 is a SENTRON undervoltage release — an auxiliary accessory that trips a 3VM molded-case circuit breaker when supply voltage drops below its dropout threshold. It's wired to the line side of the breaker and holds the mechanism closed only while voltage is present; on loss or dip, it releases the trip bar. Rated 380-400 V AC, 50/60 Hz, with an apparent power draw of 2.5 VA. This release fits the 3VM breaker family up to 630 A. Three accessory slots in the breaker accept one or more releases; this unit occupies one slot. ## Fit and panel integration Physical envelope: 65.1 mm tall, 25.7 mm wide, 28.8 mm deep. Stripped length for the connecting conductors is 10 mm (0.4 in). The release snaps into the designated slot on the breaker — no DIN-rail footprint of its own, it's a captive accessory. Status is Active per the manufacturer. This is a current-production accessory for the 3VM line.","metaTitle":"Siemens 3VM9908-0BB26 SENTRON Undervoltage Release, 380-400V","metaDescription":"Siemens 3VM9908-0BB26 SENTRON undervoltage release for 3VM breakers to 630A. 380-400V AC, 50/60Hz, 2.5 VA. Active product, available to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"28.8 mm","Width":"25.7 mm","Height":"65.1 mm","Maximum":"16","Minimum":"20","Accessories":"Auxiliary release","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":"2.5 VA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e3a9467547a17ef94fa57eaffc6bb7e7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=575133&mlfb=3VM9908-0BB26","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VM9908-0BB26/alternatives.json"},"ai":{"faq":[{"question":"What is 3VM9908-0BB26 used for?","answer":"It's an undervoltage release for Siemens 3VM molded-case circuit breakers up to 630 A. It trips the breaker when the supply voltage drops below the release's dropout point, protecting downstream equipment from undervoltage conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM9908-0BB26","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/3VM9908-0BB26 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}