{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1A-E3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE9.1A-E3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1A-E3-51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1A-E3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor TransZorb® series, Zener TVS diode, 1.5KE9.1A-/51, 1500W peak pulse, 7.78V reverse standoff, 13.4V clamping, DO-201AA axial, bulk.","salesMarkdown":"## TransZorb Zener TVS — 1500W axial clamp The 1.5KE9.1A-E3/51: Its 7.78V reverse standoff voltage protects 5V and 3.3V rails from transients, clamping at 13.4V maximum when the 112A peak pulse current flows. The DO-201AA axial-lead package handles the thermal pulse — the 1500W rating is the energy it can absorb in a single surge without failing. Stock is sourced through independent and surplus distribution; quantities and pricing are confirmed at RFQ. ## Electrical limits and temperature envelope Breakdown voltage starts at 8.65V minimum, so a 7.78V rail sees no leakage at nominal voltage — the diode stays off until the transient pushes past the threshold. No power-line protection feature (internal crowbar or SCR) — this is a pure Zener clamp, not a thyristor-based suppressor. ## Package and rework on the bench The DO-201AA axial body is through-hole — the leads are 0.96 mm diameter and the body is 5.3 mm diameter, so it fits standard 1.0 mm PCB holes. Axial diodes are easy to hand-replace with a soldering iron or hot-air station; the leads are long enough to dress into the board without stressing the glass passivation.","metaTitle":"1.5KE9.1A-E3/51 Vishay TransZorb TVS, 1500W, 7.78V","metaDescription":"Vishay 1.5KE9.1A-E3/51 TransZorb Zener TVS diode, 1500W peak pulse, 7.78V standoff, DO-201AA axial. Last Buy status — sourced to order against RFQ.","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":"1.5KE9.1","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"112A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7633","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE9.1A-/51 and get current pricing?","answer":"This part is in Last Buy status."},{"question":"What is the closest pin-compatible alternative to the 1.5KE9.1A-/51?","answer":"Any replacement would require a board spin or a parametric search for a 1500W, 7.78V standoff Zener TVS in a DO-201 package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1A-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/1.5KE9.1A-E3-51 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}