{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE540-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE540-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE540-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE540-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS, 1.5KE540-/73, 1500W (1.5kW) peak pulse power, 437V reverse standoff, 772V clamping, 1.94A peak pulse current, DO-201AA axial, through-hole, Tape & Box.","salesMarkdown":"## Key ratings and what they mean for your BOM The 1.5KE540-E3/73: The 1.5KE540-/73 is a 1500 W (1.5 kW) peak pulse power Zener TVS diode from Vishay's TransZorb series, designed to clamp transients in general-purpose circuit protection roles. Its 437 V reverse standoff voltage means it remains transparent below that DC level, only conducting when a surge exceeds the threshold. Clamping is rated at 772 V maximum at a peak pulse current of 1.94 A (10/1000 µs waveform). This is the voltage the load sees during a transient — a downstream 600 V-rated capacitor would be stressed beyond its rating during the clamp event. Breakdown occurs at a minimum of 486 V, so the device starts conducting between 486 V and the clamping voltage, protecting sensitive semiconductors on a 437 V nominal rail from overvoltage damage. The axial leads suit point-to-point wiring or PCB through-hole mounting on legacy boards where surface-mount TVS diodes are not an option. The supplier device package code is 1.5KE, confirming mechanical interchangeability with other 1.5KE-series parts on the same PCB layout. Supplied in Tape & Box (TB) format, though for an obsolete part the packaging at time of procurement will be lot-specific. ## Sourcing and compliance reality Vishay lists this part as obsolete. As a Zener TVS diode, the device is inherently RoHS-compliant in its construction (lead-free terminations per Vishay's standard).","metaTitle":"Vishay 1.5KE540-E3/73 TransZorb TVS, 1500W, 772V Clamp","metaDescription":"Vishay 1.5KE540-E3/73 TransZorb Zener TVS, 1500W peak pulse, 772V clamp at 1.94A, DO-201AA axial.","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":"1.5KE540","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"486V","Voltage - Clamping (Max) @ Ipp":"772V","Voltage - Reverse Standoff (Typ)":"437V","Current - Peak Pulse (10/1000µs)":"1.94A"}},"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 compliance documentation does Vishay provide for 1.5KE540-/73?","answer":"Vishay lists this part under the - suffix, which indicates a RoHS-compliant/green product."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE540-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/1.5KE540-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}}