{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6278HE3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6278HE3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278HE3-54","factsUrl":"https://icboms.com/api/mcp/products/1N6278HE3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, 1.5KE series, AEC-Q101 Zener TVS (TransZorb®), 1N6278HE3/54, 16.2V standoff, 29.1V clamping, 1500W peak pulse, DO-201AA through-hole, -55°C to 175°C TJ.","salesMarkdown":"The 1N6278HE3/54: The 1500W peak pulse rating (1.5kW) is a transient event spec — a single 10/1000 µs surge current pulse drives 51.5A through the device at the clamping voltage of 29.1V, absorbing the energy that would otherwise reach the load. What matters for board-level protection is the voltage window between the 16.2V reverse standoff and the 29.1V clamping ceiling: the protected rail sees no more than 29.1V during a fault event, so downstream semiconductors must survive that spike for the pulse duration. ## Automotive thermal grade and the TJ rating Rated junction temperature runs to 175°C — this is the upper bound under the transient pulse, not a continuous thermal limit. For a 12V automotive rail, the 16.2V standoff gives comfortable headroom above the nominal battery voltage, but the margin shrinks in cold-crank and load-dump scenarios. ## Automotive grade and compliance AEC-Q101 qualification places this in the automotive discrete semiconductor stress-grade tier — the qualification covers temperature cycling, humidity bias, and surge current testing to the discrete device standard. The TransZorb® designation is Vishay's trademark for their bi-directional TVS construction built on a Zener junction. The DO-201AA (DO-27) axial package is the standard through-hole footprint for this power class — it mounts in a board hole and is wave-soldered, which means thermal relief to the PCB plane matters for repeat pulse endurance.","metaTitle":"Vishay 1N6278HE3/54 Zener TVS Diode, 1500W Peak Pulse","metaDescription":"Vishay 1N6278HE3/54 — AEC-Q101 Zener TVS in DO-201AA, 16.2V standoff, 29.1V clamping, 1500W peak pulse. Obsolete. Sourced to order against RFQ.","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":"Automotive, AEC-Q101, TransZorb®","Package":"Tape & Reel (TR)","Applications":"Automotive","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/1N6278HE3%2F54/alternatives.json"},"ai":{"faq":[{"question":"What replaces 1N6278HE3/54?","answer":"No cross-reference or official replacement is documented for this exact order code. The base series (1N6278) may have an active equivalent — the voltage, clamping, and peak pulse ratings are the variables to match against whatever is current in the 1.5KE family. Confirm the fit with the sourcing team at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278HE3-54","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/1N6278HE3-54 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T16:47:02.738Z","lastPublished":"2026-07-22T16:47:02.738Z","indexable":true}}