{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1N6279A-E3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1N6279A-E3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6279A-E3-51","factsUrl":"https://icboms.com/api/mcp/products/1N6279A-E3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener, 1N6279A-/51, 1500W peak pulse, 18.8V standoff, 30.6V clamping, 49A, -55°C~175°C TJ, DO-201AA axial through-hole.","salesMarkdown":"## Last Buy — what the lifecycle status means for your BOM The 1N6279A-E3/51: The 1N6279A-/51 is listed Last Buy — the production run has closed and no further manufacturing is scheduled. TransZorb® is Vishay's TVS (Transient Voltage Suppressor) series — a Zener-based architecture optimised for clamping surge events rather than continuous regulation. The 'A' suffix denotes the tightest voltage tolerance band in the 1N6279 family. ## What 1500 W and 49 A mean for the protection design 1500 W peak pulse power at 10/1000 µs waveform defines the surge energy the diode absorbs without degradation — this is the headroom above the clamping voltage that burns off the transient before the downstream circuit sees it. A 49 A peak pulse current at the same waveform sets the complementary ceiling for the fault current the device survives. The protection window runs 18.8 V reverse standoff (normal working voltage), 20.9 V minimum breakdown (where the TVS begins conducting), and 30.6 V maximum clamping voltage at the rated peak current. The gap between standoff and clamping is the voltage spike the downstream load must survive during the event — this window is the design axis for selecting the TVS in any power-supply or motor-drive input stage. With a 175 °C maximum junction temperature and a junction-to-ambient thermal path running through the DO-201AA leadframe, the axial body acts as a heat sink in free-air or clipped-lead configurations — a board-level thermal consideration the layout engineer must account for when the clamp event is sustained. ## DO-201AA axial package and through-hole mounting The DO-201AA (also called DO-27) is a long-lead axial package — the body sits off-board and the leads conduct heat away under surge conditions. This form factor suits panel-mount TVS protection on power-supply input rails and motor-drive DC bus clamping where the diode needs to be remote from the PCB, or where lead dress adds series inductance that shapes the clamping response.","metaTitle":"Vishay 1N6279A-E3/51 TVS Diode, 1500W, 18.8V","metaDescription":"Vishay 1N6279A-E3/51 Last Buy — TransZorb® TVS diode, 1500W peak pulse, 18.8V standoff, 30.6V clamping, 49A peak pulse, DO-201AA axial. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Last Time Buy","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1N6279","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","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)":"49A"}},"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/1N6279A-E3%2F51/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 1N6279A-/51 and how is it quoted for volume purchases?","answer":"Pricing and availability are confirmed per quote against BOM quantity — no live inventory claim is made here; the independent channel carries lot-specific quantities that change."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1N6279A-E3-51","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/1N6279A-E3-51 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T16:48:20.304Z","lastPublished":"2026-07-22T16:48:20.304Z","indexable":true}}