{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6279A","brand":"onsemi","brandSlug":"onsemi","productSlug":"1N6279A","canonicalUrl":"https://icboms.com/onsemi/1N6279A","factsUrl":"https://icboms.com/api/mcp/products/1N6279A","rawCanonicalId":null},"summary":{"shortDescription":"onsemi Mosorb™ Zener TVS, 1N6279A, 1500W peak pulse power, 18.8V reverse standoff, 20.9V breakdown, 30.6V clamping, DO-201AD axial, -65°C to 175°C junction","salesMarkdown":"## What this TVS does in the circuit The 1N6279A is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, designed to clamp transient overvoltage spikes on a DC rail. It handles a peak pulse power of 1500W (1.5kW) for an 8/20µs waveform, which covers most industrial surge events from inductive load switching or lightning-coupled transients. Its reverse standoff voltage is 18.8V, with a breakdown range starting at 20.9V and clamping at 30.6V at rated current. That means it protects a 15V or 18V supply rail without conducting during normal operation, then shunts the spike before it reaches downstream silicon. ## Package and mounting for field replacement Housed in a DO-201AD axial-lead package, it is a through-hole part. On a repair bench or in the field, you can swap it with a soldering iron and a pair of cutters — no hot-air station needed. The axial leads are clearly polarized with a cathode band, so orientation is hard to mess up even without a magnifier. The junction temperature range spans -65°C to 175°C, so it survives the thermal cycling of outdoor or under-hood environments. No power line protection built in — this is a low-voltage signal or DC rail clamp, not an AC mains suppressor. ## Sourcing reality: obsolete, but still findable onsemi lists the 1N6279A as Obsolete. That means no ongoing production — no last-time-buy window is currently open. For a BOM line that needs this exact part, the only channel is existing distributor stock or the open market. We source per RFQ; availability and price vary by date code and quantity. The base product number is 1N6279, so the 'A' suffix indicates a tighter breakdown tolerance. If your board can accept a standard-tolerance part, the 1N6279 (non-A) may still be available in some channels — confirm the spec before substituting.","metaTitle":"1N6279A onsemi Mosorb™ Zener TVS – 1500W, DO-201AD, Obsolete","metaDescription":"onsemi 1N6279A Mosorb™ Zener TVS diode, 1500W peak pulse power, 18.8V standoff, DO-201AD axial. Obsolete – source via RFQ for last-time or replacement.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"Mosorb™","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6279","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"20.9V","Voltage - Clamping (Max) @ Ipp":"30.6V","Voltage - Reverse Standoff (Typ)":"18.8V","Current - Peak Pulse (10/1000µs)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1ce676890a04bce4da4e0ab60f37b157.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1N6279A?","answer":"Within the same Mosorb™ family, the 1N6279 (non-A) shares the same DO-201AD package and voltage ratings but with a looser breakdown tolerance. For a drop-in replacement with identical electrical specs, look at other 1500W TVS diodes in DO-201AD with an 18.8V standoff — for example, parts from Littelfuse or Vishay in the same package. Always compare the clamping voltage and breakdown range against your design margin before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/1N6279A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/1N6279A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:13:36.309Z","lastPublished":"2026-07-17T20:13:36.309Z","indexable":true}}