{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE18C-E3/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE18C-E3-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE18C-E3-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE18C-E3%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® TVS diode, Type Zener, Bidirectional, 1500W peak pulse, DO-201AA axial, 1.5KE18C-/54.","salesMarkdown":"## Obsolete TransZorb — what the ratings mean for your BOM The 1.5KE18C-E3/54: The bidirectional channel means a single device clamps both positive and negative surges — useful on AC-coupled or bipolar signal lines where polarity isn't fixed. Vishay lists this part as Obsolete. The DO-201AA (DO-27) axial-lead package is a through-hole form factor common to high-power TVS diodes. The 1.5KE body diameter is about 5.3 mm with 25.4 mm lead spacing — the leads are tin-plated copper and solder easily into standard 1.0 mm plated-through holes. No special thermal pad is needed; the junction-to-lead thermal path relies on the lead wire cross-section, so keep the trace width to the anode and cathode at least 2 mm wide to handle the 56.6 A peak current without trace lift. The 1500 W rating is derated above 25°C per the datasheet curve — at 175°C junction the peak pulse power drops to roughly 25% of the 25°C rating. For a 12 V rail in a 85°C ambient enclosure, budget the derating into the transient energy margin. ## Sourcing an obsolete TVS — what to expect Since Vishay has marked the 1.5KE18C-/54 as Obsolete, new-stock supply runs through independent surplus and broker channels. No last-time-buy window remains open from the factory. The reel packaging (Tape & Reel, TR) means the parts are on 13-inch reels — store them in a dry cabinet if the reel seal is broken; the axial leads are not moisture-sensitive, but long-term storage in high humidity can tarnish the tin plating. For a BOM that needs this exact clamp voltage and power level, the closest parametric match is another 1500 W bidirectional TVS with a 14.5 V standoff and 16.2 V minimum breakdown in the same DO-201AA package. No pin-compatible alternative is listed by Vishay as a direct successor, so the replacement must be qualified by the design team against the original clamping and peak current specs.","metaTitle":"1.5KE18C-E3/54 Vishay TVS Diode, 1500W, Bidirectional","metaDescription":"Vishay 1.5KE18C-E3/54 TransZorb TVS diode, 1500W peak pulse, 14.5V standoff, bidirectional, DO-201AA axial. Obsolete, sourced to order.","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":"1.5KE18","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"16.2V","Voltage - Clamping (Max) @ Ipp":"26.5V","Voltage - Reverse Standoff (Typ)":"14.5V","Current - Peak Pulse (10/1000µs)":"56.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE18C-/54?","answer":"The 1.5KE18C-/54 is obsolete and sourced through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE18C-E3-54","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/1.5KE18C-E3-54 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}}