{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91CHE3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE91CHE3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91CHE3-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91CHE3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® series, Zener TVS diode, 1.5KE91CHE3/54, 1500W peak pulse, 73.7V standoff, bidirectional, DO-201AA axial through-hole.","salesMarkdown":"## 1500W bidirectional Zener TVS for 73.7V rails The 1.5KE91CHE3/54: Its 73.7V reverse standoff voltage protects 72V nominal rails from transients up to 131V clamping at 11.5A (10/1000µs waveform). Bidirectional construction means a single device clamps both positive and negative surges — useful for AC-coupled signal lines or power rails where reverse polarity is possible, saving one diode per protected line. ## AEC-Q101 and the 175°C operating ceiling Vishay lists this part as Obsolete. For new designs or BOM continuity, the closest active alternative would need to match the 73.7V standoff, 1500W peak pulse, bidirectional configuration, and AEC-Q101 grade — a parametric search against the 1.5KE family is the starting point. ## Through-hole DO-201AA footprint and board-fit note The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor with a 0.052-inch lead diameter. It requires a 0.040-inch plated through-hole on the PCB — a legacy footprint that is still common in automotive power distribution boxes and industrial control boards where wave solder is the primary assembly method. No power line protection feature is claimed — this is a standalone TVS, not a integrated filter. The 11.5A peak pulse current at 131V clamping defines the maximum surge the diode can absorb before breakdown; for higher energy events, a larger package or parallel device is needed.","metaTitle":"1.5KE91CHE3/54 Vishay Zener TVS, 1500W, Bidirectional","metaDescription":"Vishay 1.5KE91CHE3/54 Zener TVS diode, 1500W peak pulse, 73.7V standoff, bidirectional, AEC-Q101. Obsolete — sourced to order via 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":"Automotive, AEC-Q101, TransZorb®","Package":"Tape & Reel (TR)","Applications":"Automotive","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","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":"Where can I buy 1.5KE91CHE3/54?","answer":"This part is obsolete per Vishay's lifecycle status."},{"question":"What is the closest pin-compatible alternative to 1.5KE91CHE3/54?","answer":"A functionally equivalent replacement would need to match the 73.7V standoff, 1500W peak pulse, bidirectional, AEC-Q101, and DO-201AA package. A parametric search against the 1.5KE family or an RFQ specifying these parameters is the practical path."},{"question":"What compliance documentation does Vishay provide for 1.5KE91CHE3/54?","answer":"The part carries AEC-Q101 automotive qualification, which includes the reliability stress tests and PPAP documentation typical for automotive-grade semiconductors. RoHS and REACH compliance status should be confirmed at RFQ time, as Vishay's documentation for obsolete parts may vary by lot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91CHE3-54","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/1.5KE91CHE3-54 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}}