{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43HE3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE43HE3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43HE3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43HE3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, TransZorb® series, Zener TVS diode, 1.5KE43HE3/73, 1500W peak pulse power, 34.8V reverse standoff, DO-201AA axial, AEC-Q101.","salesMarkdown":"## 1500W TransZorb for automotive transient protection The 1.5KE43HE3/73: Clamping voltage hits 61.9V max at 24.2A peak pulse current, with a 34.8V reverse standoff — means a 24V or 28V automotive rail gets clamped before the downstream ICs see damage. AEC-Q101 qualification puts this in the automotive-grade bucket — production-level PPAP, temperature cycling, and ESD reliability screening. ## Obsolete — sourcing through surplus channels Vishay lists the 1.5KE43HE3/73 as obsolete. The part is available through independent surplus and broker inventory — lot-specific, date codes confirmed at RFQ. The DO-201AA axial package is a through-hole form factor — board rework is straightforward with a standard soldering iron. No MSL concerns for this leaded package; bake-out is not required before reflow. ## Key parametric limits for BOM fit check Breakdown voltage min is 38.7V — the device starts conducting at this threshold. Reverse standoff of 34.8V means it sits transparently on a 28V rail and only clamps during a transient. Single unidirectional channel, so polarity matters: cathode to the protected rail. Peak pulse current of 24.2A at the 10/1000µs waveform defines the surge capability. Power line protection is not supported — this is a signal-line or low-side rail clamp, not a mains-side suppressor.","metaTitle":"1.5KE43HE3/73 Vishay Zener TVS, 1500W, AEC-Q101","metaDescription":"Obsolete Vishay 1.5KE43HE3/73 Zener TVS diode, 1500W peak pulse, AEC-Q101 qualified. Sourced to order against RFQ through independent distribution.","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 & Box (TB)","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":"1.5KE43","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"38.7V","Voltage - Clamping (Max) @ Ipp":"61.9V","Voltage - Reverse Standoff (Typ)":"34.8V","Current - Peak Pulse (10/1000µs)":"24.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I source the 1.5KE43HE3/73 if it's obsolete?","answer":"The 1.5KE43HE3/73 is obsolete per Vishay's lifecycle status."},{"question":"Is the 1.5KE43HE3/73 AEC-Q101 qualified?","answer":"Yes, the series carries AEC-Q101 automotive qualification — suitable for under-hood and chassis-domain transient protection where PPAP and reliability screening are required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE43HE3-73","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/1.5KE43HE3-73 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}}