{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESD5Z12T5G","brand":"onsemi","brandSlug":"onsemi","productSlug":"ESD5Z12T5G","canonicalUrl":"https://icboms.com/onsemi/ESD5Z12T5G","factsUrl":"https://icboms.com/api/mcp/products/ESD5Z12T5G","rawCanonicalId":null},"summary":{"shortDescription":"onsemi ESD5Z12T5G, Zener ESD suppressor, 12V reverse standoff, 240W peak pulse power, 55pF capacitance, unidirectional, SOD-523 package, -55°C to 150°C operating range.","salesMarkdown":"## 12V rail ESD clamp in a SOD-523 footprint The ESD5Z12T5G is a unidirectional Zener-type ESD suppressor from onsemi, designed to clamp transients on signal lines with a 12V reverse standoff voltage. Its 240W peak pulse power rating means it can absorb the energy from an ESD strike or a short cable discharge without failing — useful on I/O ports and connector pins where the board has limited space. The 55pF capacitance at 1MHz is low enough to avoid loading high-speed interfaces like USB 2.0 or 100BASE-TX, where added capacitance would round the edges and close the eye diagram. The SOD-523 package is a 1.6 mm × 0.8 mm body — it fits under a connector shroud or alongside a series resistor without crowding the adjacent passives. Breakdown starts at 14.1V minimum, giving a 2.1V guard band above the 12V rail — enough to keep the part out of conduction during normal operation while still reacting before the downstream IC's absolute maximum is hit. The clamping voltage is 25V at the peak pulse current of 9.6A (8/20µs waveform), which is the voltage the protected IC sees across its pins during the event. onsemi lists the ESD5Z12T5G as Active, so there is no last-time-buy deadline or end-of-life notice to track. For volume pricing or a firm lead time, submit an RFQ against your BOM quantity — we source through authorized channels and confirm availability at quote time. ## Where it fits on the board Surface-mount to SOD-523 — the footprint is a two-pad layout with the cathode marked by a bar on the body. No power-line protection — this is a signal-line clamp, not a mains transient suppressor.","metaTitle":"ESD5Z12T5G onsemi Zener ESD Suppressor – 12V, 240W, SOD-523","metaDescription":"onsemi ESD5Z12T5G Zener ESD suppressor: 12V reverse standoff, 240W peak pulse, 55pF capacitance, SOD-523. Active production.","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":"SC-79, SOD-523","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"240W","Base Product Number":"ESD5Z12","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"55pF @ 1MHz","Supplier Device Package":"SOD-523","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"14.1V","Voltage - Clamping (Max) @ Ipp":"25V","Voltage - Reverse Standoff (Typ)":"12V (Max)","Current - Peak Pulse (10/1000µs)":"9.6A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/32a7aa25708c44b218e59a0ef208ee83.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the capacitance of ESD5Z12T5G?","answer":"55pF at 1MHz. This low capacitance makes it suitable for high-speed data lines where signal integrity matters — USB 2.0, Ethernet, or LVDS interfaces will not see significant loading."},{"question":"Is ESD5Z12T5G unidirectional or bidirectional?","answer":"Unidirectional. It clamps positive transients above the breakdown voltage and conducts forward as a diode below ground. For bidirectional protection on a differential pair, you would need two devices or a dedicated bidirectional suppressor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/ESD5Z12T5G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/ESD5Z12T5G 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}}