{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE51AH","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5KE51AH","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE51AH","factsUrl":"https://icboms.com/api/mcp/products/1.5KE51AH","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor 1.5KE series, Automotive TVS Zener Diode, 1.5KE51AH, 1500W peak pulse power, 70.1V clamping voltage, DO-201AA (DO-27) axial, AEC-Q101 qualified.","salesMarkdown":"## Automotive-grade transient suppression for 43.6V rails The 1.5KE51AH is a 1500W unidirectional TVS Zener diode in the 1.5KE series, designed to clamp transients on 43.6V nominal rails in automotive and industrial DC buses. The DO-201AA axial-lead package suits through-hole assembly on power entry boards or secondary-side rectifier positions where the lead bend absorbs board flex and the large body dissipates pulse energy into the copper pour. ## Clamp voltage, breakdown, and the 10/1000 µs pulse Reverse standoff voltage is 43.6V — the rail should never exceed this in normal operation. Breakdown starts at 48.5V minimum, so the diode stays off until a transient pushes the bus above that threshold. Maximum clamping voltage is 70.1V at the rated 22A peak pulse current, measured with a 10/1000 µs waveform. That 22A figure is the current the diode must sink to hold the bus below 70.1V — if the source impedance is low enough to deliver more than 22A, the clamp voltage rises and the protected circuit must survive the overshoot. A shorter pulse (8/20 µs) allows higher peak current; a longer one derates the power. The datasheet derating curve governs the actual safe operating area for non-standard pulse widths. ## Active production and sourcing posture Tape & Reel packaging is standard for the DO-201AA body.","metaTitle":"1.5KE51AH TVS Diode, 1500W, 70.1V Clamp, DO-201","metaDescription":"Taiwan Semiconductor 1.5KE51AH automotive TVS, 1500W peak pulse, 70.1V clamp, AEC-Q101, DO-201 axial. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Taiwan Semiconductor Corporation","Type":"Zener","Grade":"Automotive","Series":"1.5KE","Package":"Tape & Reel (TR)","Applications":"-","Mounting Type":"Through Hole","Qualification":"AEC-Q101","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE51","Operating Temperature":"-55°C ~ 175°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"48.5V","Voltage - Clamping (Max) @ Ipp":"70.1V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"22A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4993","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4dcb99a7f79cf8bf2af90adb01e7c4c4.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE51AH","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/taiwan-semiconductor-corporation/1.5KE51AH when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}