{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE68CA-E3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE68CA-E3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE68CA-E3-51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE68CA-E3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® bidirectional TVS, 1.5KE68CA-/51, 1500W peak pulse, 58.1V standoff, 92V clamp, DO-201AA/DO-27 axial, through-hole, bulk.","salesMarkdown":"## What the 1500 W rating means for your protection design The 1.5KE68CA-E3/51: That 1500 W figure is the maximum energy the part can absorb in a single surge event — it does not mean continuous dissipation. For a 92 V clamp voltage, the corresponding peak pulse current is 16.3 A, which is the current the device shunts during the transient. The three voltage thresholds that define fit are: 58.1 V reverse standoff (the maximum DC or AC peak voltage the protected line can carry without the TVS conducting), 64.6 V minimum breakdown (where avalanche conduction starts), and 92 V maximum clamping (the voltage the load sees during the surge). A 48 V nominal bus with 10 % tolerance sits at 52.8 V, well below the 58.1 V standoff — this part is sized for that rail. ## Package and board integration Housed in a DO-201AA / DO-27 axial-leaded package, this part mounts through-hole. The axial leads require the body to be suspended above the board — the lead bend radius and standoff height must follow the Vishay application note to avoid cracking the glass passivation. The 1.5KE package suffix means the cathode band is marked; for a bidirectional part, orientation does not matter, but the marking still follows the convention. The 175°C TJ ceiling means the part can sit near a hot power supply or in an engine bay without derating the surge capability — but the 1500 W rating is at 25°C; derate linearly above that per the datasheet curve. ## Last Buy — sourcing reality for this Vishay TVS Vishay has placed the 1.5KE68CA-/51 into Last Buy status. This is not yet obsolete — the factory still accepts final orders within a defined window — but new designs should not specify this part number. For existing BOM lines, the remaining factory allocation is finite; once exhausted, supply shifts to independent distribution channels. The base product number 1.5KE68 covers the whole family; if a different package or polarity variant is acceptable, the BOM can be updated without a board spin. ## Bidirectional — one part for both polarity surges This is a single-channel bidirectional TVS, meaning it clamps transients of either polarity symmetrically. On an AC signal line or a bipolar DC bus, one bidirectional part replaces two unidirectional diodes back-to-back, saving board space and reducing part count. The breakdown and clamping voltages are the same in both directions.","metaTitle":"1.5KE68CA-E3/51 Vishay TVS, 1500W Bidirectional, 92V Clamp","metaDescription":"Vishay 1.5KE68CA-E3/51 TransZorb bidirectional TVS, 1500W peak pulse, 58.1V standoff, 92V clamp. Last Buy status — sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Bulk","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Last Time Buy","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE68","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"64.6V","Voltage - Clamping (Max) @ Ipp":"92V","Voltage - Reverse Standoff (Typ)":"58.1V","Current - Peak Pulse (10/1000µs)":"16.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8847","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE68CA-/51 and get a price?","answer":"This part is sourced to order through our independent distribution network. No stock-holding or lead-time claim is made here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE68CA-E3-51","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/1.5KE68CA-E3-51 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}}