{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE15ARL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"1.5KE15ARL","canonicalUrl":"https://icboms.com/stmicroelectronics/1.5KE15ARL","factsUrl":"https://icboms.com/api/mcp/products/1.5KE15ARL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics 1.5KE15ARL, series 1.5KE TRANSIL™, Type Zener, 1500W peak pulse power, 12.8V standoff, 27.2V clamp, 368A (8/20µs), DO-201AA/DO-27 axial, through hole.","salesMarkdown":"## 1.5 kW Zener TVS — what it protects and where The STMicroelectronics 1.5KE15ARL is a unidirectional Zener transient voltage suppressor from the 1.5KE TRANSIL™ series, rated for 1500 W peak pulse power over a 10/1000 µs waveform. It clamps transients at 27.2 V maximum while the reverse standoff voltage sits at 12.8 V, making it a fit for 12 V rail protection in industrial, telecom, and general-purpose DC bus applications. Breakdown occurs between 14.3 V minimum, so the part catches overvoltage events before they reach downstream silicon. The through-hole DO-201AA / DO-27 axial package suits point-to-point wiring or PCB mounting where leaded transient protection is preferred over surface-mount alternatives. STMicroelectronics lists the 1.5KE15ARL as obsolete. ## Ratings that decide the fit Three voltage numbers gate the application: the reverse standoff of 12.8 V is the maximum DC or peak AC voltage the protected line can carry without the device conducting; the minimum breakdown of 14.3 V is where avalanche begins; and the maximum clamping of 27.2 V at the rated peak pulse current is the voltage the load sees during a surge. The 368 A peak pulse current figure is measured with an 8/20 µs waveform, a common lightning-surge test condition. Capacitance of 5000 pF at 1 MHz matters on signal lines where excessive loading would distort high-speed data.","metaTitle":"STMicroelectronics 1.5KE15ARL Zener TVS, 1.5kW, DO-201","metaDescription":"ST 1.5KE15ARL Zener TVS diode, 1500W peak pulse power, 12.8V standoff, 27.2V clamp, DO-201 axial. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"1.5KE, TRANSIL™","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-","Power Line Protection":"No","Capacitance @ Frequency":"5000pF @ 1MHz","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"14.3V","Voltage - Clamping (Max) @ Ipp":"27.2V","Voltage - Reverse Standoff (Typ)":"12.8V","Current - Peak Pulse (10/1000µs)":"368A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/089e26c8bbf5e28593f663899fc6cea1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE15ARL/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for 1.5KE15ARL?","answer":"No official STMicroelectronics successor order code is recorded for the 1.5KE15ARL. A functional replacement within the same 1.5KE TRANSIL™ family would need matching or tighter standoff (12.8 V), breakdown (14.3 V min), and clamping (27.2 V max) in the DO-201 package. Verify the voltage thresholds against your circuit's protection requirements before substituting."},{"question":"What package is the 1.5KE15ARL?","answer":"It comes in a DO-201AA / DO-27 axial lead, through-hole package, with the supplier device package designated as DO-201."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/1.5KE15ARL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/1.5KE15ARL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}