{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9988-0BF21","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9988-0BF21","canonicalUrl":"https://aoctrl.com/siemens/3VA9988-0BF21","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0BF21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, time-delay device, 3VA9988-0BF21, fixed 100 ms OFF-delay at 110V AC, accessory for 3VA undervoltage release, stripped length 10 mm, 72.3 x 44.8 x 57.5 mm.","salesMarkdown":"The Siemens 3VA9988-0BF21 is a fixed-delay time-delay device from the SENTRON accessory range, designed specifically for use with 3VA undervoltage releases at 110V AC. It provides a minimum OFF-delay time of 100 ms, which means that after the undervoltage release trips, the load stays disconnected for at least that window before the release can reset — critical for ride-through coordination in a selective distribution scheme. This is a panel-mounted accessory, sized to snap into the 3VA breaker footprint alongside the release it serves. ## Dimensions & Integration The accessory measures 72.3 mm deep, 44.8 mm wide, and 57.5 mm high — a compact footprint that fits within the 3VA breaker's accessory bay. The 10 mm stripped length on the wiring tails matches standard ferrule and terminal-block preparation for panel wiring.","metaTitle":"Siemens 3VA9988-0BF21 SENTRON Time-Delay Device, 110V AC, 10","metaDescription":"Siemens 3VA9988-0BF21 SENTRON time-delay accessory for 3VA undervoltage releases. Fixed 100 ms OFF-delay at 110V AC. Current lifecycle stage. Available to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"72.3 mm","Width":"44.8 mm","Height":"57.5 mm","Maximum":"16","Minimum":"20","Accessories":"Time-delay device","Stripped Length":"10 mm","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Accessories","Stripped Length [In]":"0.4 in","Design Of The Product":"Time-delay device","OFF-delay time / minimum":"100 ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=386725&mlfb=3VA9988-0BF21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0BF21/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA9988-0BF21 and get a price?","answer":"The 3VA9988-0BF21 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote."},{"question":"What is the OFF-delay time on the 3VA9988-0BF21?","answer":"The 3VA9988-0BF21 provides a fixed OFF-delay with a minimum time of 100 ms at 110V AC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9988-0BF21","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/3VA9988-0BF21 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}}