{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESD9B3.3ST5G","brand":"onsemi","brandSlug":"onsemi","productSlug":"ESD9B3.3ST5G","canonicalUrl":"https://icboms.com/onsemi/ESD9B3.3ST5G","factsUrl":"https://icboms.com/api/mcp/products/ESD9B3.3ST5G","rawCanonicalId":null},"summary":{"shortDescription":"onsemi ESD9B3.3ST5G, Zener-type bidirectional ESD protection diode, 3.3V (Max) reverse standoff, 15pF capacitance, in SOD-923 package.","salesMarkdown":"## Zener ESD clamp for 3.3V signal lines Its 3.3V (Max) reverse standoff voltage sits just above the nominal supply, so it stays invisible during normal operation and only conducts when a spike exceeds the 5V breakdown threshold. With a clamping voltage of 11.5V at 2A (8/20µs pulse), it limits the peak voltage seen by the protected IC to a level that most 3.3V CMOS I/O cells survive. The 15pF capacitance at 1MHz is low enough to avoid degrading edge rates on USB 2.0 (480 Mbps) or similar high-speed differential pairs. ## SOD-923 footprint and reflow profile The SOD-923 package is small, so the PCB land pattern needs tight solder-paste registration. The single bidirectional channel means only two pads: one for the signal line, one for ground. No power-line protection; this part is for signal-line clamping only. The small thermal mass means the part heats up quickly during a pulse, but the 2A peak pulse current rating (8/20µs) is sufficient for ESD strikes. onsemi lists the ESD9B3.3ST5G as Active.","metaTitle":"ESD9B3.3ST5G onsemi Zener ESD Protection, SOD-923, 3.3V","metaDescription":"onsemi ESD9B3.3ST5G Zener TVS, 3.3V reverse standoff, 15pF capacitance, SOD-923. Active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"SOD-923","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"-","Base Product Number":"ESD9B3.3","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"15pF @ 1MHz","Supplier Device Package":"SOD-923","Voltage - Breakdown (Min)":"5V","Voltage - Clamping (Max) @ Ipp":"11.5V","Voltage - Reverse Standoff (Typ)":"3.3V (Max)","Current - Peak Pulse (10/1000µs)":"2A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1ad1ea5342243a5e2d5b6bdc8c4135f6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can ESD9B3.3ST5G be used for USB 2.0 protection?","answer":"Yes. The 3.3V reverse standoff matches USB 2.0 VBUS or signal-line levels, and the 15pF capacitance is low enough to maintain signal integrity at 480 Mbps. The bidirectional channel works for differential pairs like D+ and D-."},{"question":"Is ESD9B3.3ST5G obsolete?","answer":"No. The product status is Active. No end-of-life notification has been issued by onsemi."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/ESD9B3.3ST5G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/ESD9B3.3ST5G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}