{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91-E3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE91-E3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91-E3-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91-E3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS, 1.5KE91-/54, 1500W peak pulse, 73.7V reverse standoff, 131V clamping, DO-201AA axial, through hole.","salesMarkdown":"## TransZorb Zener TVS — 1500 W peak pulse, 73.7 V standoff The 1.5KE91-E3/54: The 1.5KE91-/54 is a Vishay TransZorb® Zener TVS diode in the 1.5KE series, designed to clamp transients on general-purpose DC power and signal lines. The reverse standoff voltage of 73.7 V sets the DC operating ceiling: the line voltage must stay below this level during normal operation, or the diode leaks and eventually fails short. The breakdown window starts at 81.9 V minimum, giving about 8 V of headroom before the device begins conducting. ## Package and board-fit — DO-201AA axial Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE91-/54 mounts into a 1.1 mm diameter hole on the PCB with a lead spacing of about 8.9 mm. The axial body stands off the board; the leads are typically formed or bent to fit the pad layout. This package is common across the 1.5KE family, so a replacement from the same series shares the same footprint. ## Sourcing reality — obsolete, sourced on request Vishay has marked the 1.5KE91-/54 as obsolete. No official successor order code is recorded for this specific breakdown voltage and package variant. For a design still using this TVS, the closest functional match is another 1.5KE-series Zener at the same 73.7 V standoff — but the exact breakdown window and clamping voltage should be cross-checked against the application's transient requirements before committing a replacement.","metaTitle":"1.5KE91-E3/54 Vishay TransZorb TVS, 1500W, 73.7V Standoff","metaDescription":"1.5KE91-E3/54 Vishay TransZorb Zener TVS diode, 1500W peak pulse, 73.7V reverse standoff, DO-201AA axial. 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":"TransZorb®","Package":"Tape & Reel (TR)","Applications":"General Purpose","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":"1.5KE91","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"81.9V","Voltage - Clamping (Max) @ Ipp":"131V","Voltage - Reverse Standoff (Typ)":"73.7V","Current - Peak Pulse (10/1000µs)":"11.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5KE91-/54?","answer":"A direct pin-compatible replacement would be another 1.5KE-series Zener TVS with the same 73.7 V reverse standoff voltage and DO-201AA axial package. No specific successor order code is recorded; the breakdown and clamping specs must be matched to the application's transient profile."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91-E3-54","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/1.5KE91-E3-54 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}