{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6278-E3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6278-E3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278-E3-54","factsUrl":"https://icboms.com/api/mcp/products/1N6278-E3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor Zener TVS, TransZorb® series, 1N6278-/54, unidirectional, 1500W peak pulse, 18V breakdown, 51.5A peak pulse current, DO-201AA axial through-hole package.","salesMarkdown":"## What the 1N6278-E3/54 is The 1N6278-/54 is a unidirectional Zener-based transient voltage suppressor (TVS) — Vishay's TransZorb® designation marks it as a Zener-construction clamp diode rather than a MOV or TVS built on other suppressor architectures. Rated 1500 W peak pulse (10/1000 µs waveform), it protects downstream circuitry by clamping overvoltage transients at the diode's Zener threshold rather than crow-barring the rail. ## Clamping and standoff voltages The reverse standoff voltage is 16.2 V typ — the working rail the protected circuit runs at, below which the TVS draws negligible leakage. Breakdown triggers at a minimum of 18 V, so the diode stays off during normal operation at 16.2 V and switches into conduction as the transient pushes the node above 18 V. For a 16 V rail, the TVS holds the spike to 29.1 V long enough for the upstream supply or fuse to clear the fault. ## Sourcing posture No pin-compatible replacement is listed in the available cross-reference data, so a design team evaluating a new production run faces a different footprint and pinout — a board spin is required to adopt an alternative TVS in this position. Available through independent distribution channels; lot-specific availability and traceability confirmed at RFQ.","metaTitle":"Vishay 1N6278-E3/54, 1.5kW Zener TVS, 18V Clamping","metaDescription":"Vishay 1N6278-E3/54 — 1.5kW peak pulse unidirectional Zener TVS (TransZorb®), 18V breakdown, DO-201AA axial through-hole.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6278","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"18V","Voltage - Clamping (Max) @ Ipp":"29.1V","Voltage - Reverse Standoff (Typ)":"16.2V","Current - Peak Pulse (10/1000µs)":"51.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6278-E3%2F54/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278-E3-54","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278-E3-54 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T16:46:48.711Z","lastPublished":"2026-07-22T16:46:48.711Z","indexable":true}}