{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6278AHE3_B/C","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6278AHE3_B-C","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278AHE3_B-C","factsUrl":"https://icboms.com/api/mcp/products/1N6278AHE3_B%2FC","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, TransZorb® series, unidirectional TVS/Zener diode, 1N6278AHE3_B/C, AEC-Q101, 1500W peak pulse, 17.1V standoff / 27.7V clamping, DO-201AA axial, -55°C to 175°C junction, Tape & Reel.","salesMarkdown":"## What the clamping voltages mean for the protected node The 1N6278AHE3_B/C: The 27.7 V clamping ceiling is the number that protects the downstream semiconductor — the downstream device sees no more than that voltage during a surge event, so its absolute-maximum rating must sit above 27.7 V with margin to spare. ## Peak pulse power and thermal headroom The -55°C to 175°C junction temperature range gives substantial thermal headroom for automotive engine-bay and telecom outdoor enclosures that see wide ambient swings; the DO-201AA axial lead package conducts heat into the PCB copper and the lead frame, so the layout pad area directly governs the thermal resistance the diode achieves in the end equipment. ## Automotive qualification — what AEC-Q101 means here AEC-Q101 qualification means the diode passed the automotive stress-discrete test sequence — humidity, temperature cycling, bias life, and surge repetition — at the grade level corresponding to its temperature rating. This is the baseline qualification needed for any automotive ECU input-protection or telecom infrastructure board that must demonstrate automotive-grade Bill of Materials compliance to IATF 16949. ## Telecom line protection application context Listed for telecom applications — on a 48 V or 24 V telecom bus the diode's 17.1 V standoff sits well below the working rail, so the line operates with no clamp interference. A lightning surge or switching transient on the outdoor cable pair raises the line voltage above standoff; the diode clamps at 27.7 V before the active devices downstream see overstress. Telecom protection standards (GR-1089, ITU-T K-series) specify the 10/700 µs and 8/20 µs waveforms; the 1.5 kW / 54.2 A ratings at 10/1000 µs give a conservative match — verify the test waveform in the datasheet application section before committing to a specific surge compliance test.","metaTitle":"Vishay 1N6278AHE3_B/C TVS Diode, 1500W Peak, AEC-Q101","metaDescription":"Vishay 1N6278AHE3_B/C unidirectional TVS diode, TransZorb® series, 17.1V standoff / 27.7V clamping, AEC-Q101 qualified, DO-201AA axial. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Grade":"Automotive","Series":"TransZorb®","Package":"Tape & Reel (TR)","Applications":"Telecom","Mounting Type":"Through Hole","Qualification":"AEC-Q101","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","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)":"19V","Voltage - Clamping (Max) @ Ipp":"27.7V","Voltage - Reverse Standoff (Typ)":"17.1V","Current - Peak Pulse (10/1000µs)":"54.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4467","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1N6278AHE3_B%2FC/alternatives.json"},"ai":{"faq":[{"question":"Is the 1N6278AHE3_B/C an obsolete or NRND part?","answer":"No — the manufacturer lists this part as Active. It is not in last-time-buy or end-of-life status on the record available here."},{"question":"What type and grade is the 1N6278AHE3_B/C?","answer":"It is a Zener-type unidirectional TVS diode, Automotive grade, qualified to AEC-Q101. The TransZorb® series designation indicates the Vishay transient voltage suppressor construction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6278AHE3_B-C","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/1N6278AHE3_B-C 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}}