{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE56-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE56-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE56-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS, 1.5KE56-/73, 1500W peak pulse, 45.4V standoff, 80.5V clamp, DO-201AA axial, through hole.","salesMarkdown":"## What the 1500W rating means on a TVS diode The 1.5KE56-E3/73: That 1500W figure is the peak power the die can absorb in a single transient event — it does not mean continuous dissipation. For a sustained overvoltage, the junction temperature rise would exceed the 175°C TJ limit within milliseconds. The reverse standoff voltage is 45.4V, meaning the diode stays high-impedance below that level and does not load the rail. ## Package and rework — DO-201AA axial Through-hole DO-201AA (DO-27) axial package. Rework is straightforward — two solder points, no thermal pad to manage. Pin 1 is the cathode band; the anode is the opposite lead. That covers military and industrial environments — the die itself is the limiting factor, not the package or solder joint. ## Lifecycle and sourcing — obsolete, no direct successor Vishay lists the 1.5KE56-/73 as Obsolete. The TransZorb series has been superseded by newer TVS families, but no single pin-compatible drop-in replacement is documented. No second-source cross-reference is maintained by the original manufacturer.","metaTitle":"1.5KE56-E3/73 Vishay TransZorb TVS, 1500W, DO-201AA","metaDescription":"Vishay 1.5KE56-E3/73 TransZorb Zener TVS diode, 1500W peak pulse, 45.4V standoff, 80.5V clamp. 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 & Box (TB)","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":"1.5KE56","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"50.4V","Voltage - Clamping (Max) @ Ipp":"80.5V","Voltage - Reverse Standoff (Typ)":"45.4V","Current - Peak Pulse (10/1000µs)":"18.6A"}},"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 1.5KE56-/73?","answer":"No official pin-compatible successor is documented by Vishay. The functional replacement would require a different TVS series with matching standoff voltage (45.4V) and peak pulse power (1500W), but board-level verification is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE56-E3-73","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/1.5KE56-E3-73 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}}