{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91A-T","brand":"Diodes Incorporated","brandSlug":"diodes-inc","productSlug":"1.5KE91A-T","canonicalUrl":"https://icboms.com/diodes-inc/1.5KE91A-T","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91A-T","rawCanonicalId":null},"summary":{"shortDescription":"Diodes Incorporated 1.5KE series Zener TVS diode, 1.5KE91A-T, 1500W peak pulse power, 77.8V reverse standoff, 125V clamping, DO-201AA axial through-hole, Tape & Reel.","salesMarkdown":"## Transient suppression for legacy 77.8V rails The 1.5KE91A-T: With a breakdown voltage range starting at 86.5V minimum, the diode remains transparent during normal operation and only conducts when the transient exceeds that threshold. The 12A peak pulse current rating confirms the energy-handling capacity for moderate surge conditions. ## Obsolete — sourcing through independent channels Diodes Incorporated has marked the 1.5KE91A-T as Obsolete. No official successor part number is recorded on this line. For designs that cannot tolerate a board spin, the DO-201AA axial footprint is a standard industry package, so a parametric equivalent from another manufacturer (matching 1500W, 77.8V standoff, and unidirectional polarity) can be sourced as a drop-in replacement with appropriate qualification review. ## Environmental and mounting considerations The DO-201AA (DO-27) axial-lead package mounts through-hole, suitable for point-to-point wiring or PCB layouts with 0.100-inch pitch. Tape & Reel packaging supports automated insertion for volume assembly.","metaTitle":"1.5KE91A-T Diodes Zener TVS, 1500W, 77.8V Standoff","metaDescription":"Obsolete 1.5KE91A-T Zener TVS diode, 1500W peak pulse, 77.8V standoff, 125V clamping. DO-201 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Diodes Incorporated","Type":"Zener","Series":"-","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE91","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b6b9d4121cb66208511919f4a66769e1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE91A-T and get a price?","answer":"No stock-holding or lead-time number is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diodes-inc/1.5KE91A-T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diodes-inc/1.5KE91A-T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-19T21:35:12.951Z","lastPublished":"2026-07-19T21:35:12.951Z","indexable":true}}