{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6278-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6278-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1N6278-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, TransZorb® series, unidirectional Zener TVS, 1.5kW peak pulse, 16.2V standoff, 18V min breakdown, 29.1V clamping @ 51.5A, DO-201AA axial through-hole, Tape & Box.","salesMarkdown":"## What the clamping chain means for your rail The 1N6278-E3/73: The 1N6278-/73 is a unidirectional TransZorb® Zener TVS in the DO-201AA axial package — Vishay's branded suppresssor for clamping transient overvoltage on a protected rail. For a 16 V nominal rail, that 29.1 V ceiling gives the downstream circuitry a defined overvoltage boundary — the downstream component's abs-max must sit above 29.1 V to survive the clamped event without being the first thing to fail. ## 1.5 kW peak and 175 °C junction rating The 1500 W peak pulse rating (1.5 kW) defines the surge energy the device can absorb without degradation — this is the 10/1000 µs test condition, not a continuous rating. The 51.5 A peak pulse current at that wave shape is what determines the clamping voltage in a real transient event; higher surge currents will pull the clamping voltage above 29.1 V until the device's peak pulse power limit is reached. The -55 °C to 175 °C junction temperature range places this firmly in the industrial/automotive temperature band — the upper junction ceiling of 175 °C means derating to keep TJ below that limit is workable even in poorly-ventilated enclosures or engine-adjacent applications. ## Sourcing the obsolete 1N6278-E3/73 This part is obsolete — marked end-of-life with no official successor named in the record. For a TransZorb family replacement, look across the 1.5KE series — the same Vishay series in a compatible DO-201AA footprint — and confirm the standoff, breakdown, and clamping ratings match the original design before committing.","metaTitle":"Vishay 1N6278-E3/73 TVS Diode, 16.2V Standoff, 1.5kW","metaDescription":"Vishay 1N6278-E3/73 unidirectional TransZorb TVS diode, 16.2V standoff, 18V breakdown, 29.1V clamping at 51.5A peak pulse, 1.5kW peak.","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 & Box (TB)","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%2F73/alternatives.json"},"ai":{"faq":[{"question":"What family does the 1N6278-/73 belong to and is there a replacement?","answer":"It is a member of Vishay's TransZorb® series — the company's branded unidirectional Zener TVS family — housed in the DO-201AA axial package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278-E3-73","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-E3-73 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T16:46:26.694Z","lastPublished":"2026-07-22T16:46:26.694Z","indexable":true}}