{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1CHE3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE9.1CHE3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1CHE3-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1CHE3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive, AEC-Q101, TransZorb® series, 1.5KE9.1CHE3/54, Zener TVS, 1500W, 7.37V standoff, DO-201AA axial.","salesMarkdown":"## Obsolete, but still spec'd into BOMs — the sourcing reality Vishay has marked the 1.5KE9.1CHE3/54 as Obsolete. That means the factory line is closed — no last-time-buy window, no further production. For a BOM that already carries this Vishay TransZorb, the only supply path is through independent distribution holding new-old-stock or surplus inventory. If you are migrating a design, the replacement will be a parametric match (same 1500 W peak pulse, same 7.37 V reverse standoff, same DO-201AA footprint) from the current TransZorb or an equivalent series — but no pin-compatible drop-in is formally listed. ## 1500 W peak pulse, 7.37 V standoff — what these ratings mean for the circuit The 1.5KE9.1CHE3/54 is a 1500 W peak-pulse-power Zener TVS in the TransZorb series. The 7.37 V reverse standoff voltage means the diode will not conduct at normal 5 V or 12 V rails — it sits transparent across the line until a transient exceeds that threshold. Breakdown starts at 8.19 V min, and the clamping voltage is held to 13.8 V max at the full 109 A peak-pulse current. The 10/1000 µs waveform is the standard TVS test pulse — a 10 µs rise to peak, 1000 µs half-decay. The 109 A rating at that pulse shape tells you the diode can absorb a substantial surge without failing short. For a 12 V automotive battery line, the 7.37 V standoff gives a few volts of headroom before the diode starts clamping, which is typical for protecting downstream ECUs from load-dump and inductive-kick transients. ## AEC-Q101 and the automotive deployment envelope The 1.5KE9.1CHE3/54 carries the Automotive, AEC-Q101 qualification. AEC-Q101 is the stress-test and reliability standard for discrete semiconductors used in automotive electronics — it certifies the part for the temperature, vibration, and lifetime requirements of under-hood and cabin modules.","metaTitle":"Vishay 1.5KE9.1CHE3/54 TransZorb TVS, 1500W, DO-201AA","metaDescription":"Vishay 1.5KE9.1CHE3/54 TransZorb TVS diode, 1500W peak pulse, 7.37V standoff, AEC-Q101. Obsolete; sourced per RFQ through independent supply.","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":"1.5KE9.1","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"8.19V","Voltage - Clamping (Max) @ Ipp":"13.8V","Voltage - Reverse Standoff (Typ)":"7.37V","Current - Peak Pulse (10/1000µs)":"109A"}},"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 the 1.5KE9.1CHE3/54?","answer":"A functional replacement would need to match the 1500 W peak pulse, 7.37 V reverse standoff, bidirectional channel, and DO-201AA axial package. Vishay's current TransZorb series includes many 1500 W parts; a parametric search against those four constraints will yield candidates, but no drop-in cross-reference is formally published."},{"question":"How do I source the 1.5KE9.1CHE3/54 now that it is obsolete?","answer":"Availability and pricing are lot-specific and confirmed at the time of an RFQ. The through-hole DO-201AA package means the stock is typically in bulk tubes or tape-and-reel; quantities are confirmed per inquiry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1CHE3-54","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/1.5KE9.1CHE3-54 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}}