{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE39A/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE39A-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE39A-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE39A%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® TVS, Type Zener, 1.5KE39A/54, 1500W (1.5kW) Peak Pulse, 33.3V Reverse Standoff, 53.9V Clamping, DO-201AA Axial, Through Hole.","salesMarkdown":"The 1.5KE39A/54: It is a unidirectional Zener-type suppressor in the DO-201AA (DO-27) axial-lead package, rated for a 10/1000µs surge waveform up to 27.8A peak pulse current. The 33.3V reverse standoff voltage (V_RWM) means the diode stays transparent on a 24V or 28V bus, drawing negligible leakage. When a transient exceeds 37.1V (the minimum breakdown voltage), the device avalanches and clamps the surge to 53.9V maximum, shunting the energy to ground. This makes it suitable for general-purpose secondary protection on DC power rails, telecom line cards, and industrial control supplies where a single unidirectional TVS is needed per rail. ## Lifecycle status and sourcing reality Vishay lists the 1.5KE39A/54 as Obsolete. No official successor order code is recorded in the lifecycle data. For existing BOM lines, the 1.5KE39A/54 is available through independent surplus and broker channels. The DO-201AA axial package and 33.3V standoff voltage are the key fit parameters to verify against the board layout and rail voltage. ## Package and thermal considerations for board fit The DO-201AA (DO-27) axial package is a through-hole form factor with a 9.1mm body length and 5.3mm diameter typical. The leads are tin-plated copper. The junction temperature range spans -55°C to +175°C, covering industrial and military-temperature environments. The 1500W peak-pulse rating assumes a 25°C ambient; derating is required at elevated temperatures per the standard power-temperature curve for axial-lead TVS diodes.","metaTitle":"1.5KE39A/54 Vishay TransZorb TVS, 1500W, 33.3V Standoff","metaDescription":"Obsolete 1.5KE39A/54 Vishay TransZorb TVS diode, 1500W peak pulse, 33.3V standoff, DO-201AA. 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":"TransZorb®","Package":"Tape & Reel (TR)","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":"1.5KE39","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"37.1V","Voltage - Clamping (Max) @ Ipp":"53.9V","Voltage - Reverse Standoff (Typ)":"33.3V","Current - Peak Pulse (10/1000µs)":"27.8A"}},"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 the 1.5KE39A/54?","answer":"Submit an RFQ for the quantity you need."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE39A-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/1.5KE39A-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}}