{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43A-T","brand":"Diodes Incorporated","brandSlug":"diodes-inc","productSlug":"1.5KE43A-T","canonicalUrl":"https://icboms.com/diodes-inc/1.5KE43A-T","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43A-T","rawCanonicalId":null},"summary":{"shortDescription":"Diodes Incorporated 1.5KE43A-T Zener TVS diode, 1500W peak pulse power, 36.8V reverse standoff, 59.3V clamping, unidirectional, DO-201AA/DO-27 axial through-hole, Tape & Reel.","salesMarkdown":"## 1500W surge rating and what it means for your protection threshold The 1.5KE43A-T is a 1500W (1.5kW) peak pulse power Zener TVS diode from Diodes Incorporated, designed to clamp transient overvoltage events on a 36.8V nominal rail. The clamping voltage is held to 59.3V at the rated 25.3A peak pulse current (10/1000µs waveform), which means a 48V bus or a 36V supply line sees the transient clipped before it reaches downstream silicon. ## DO-201 axial package and board integration Housed in a DO-201AA / DO-27 axial leaded package (supplier device package DO-201), the 1.5KE43A-T is a through-hole component intended for manual or wave-solder assembly. The axial leads suit point-to-point wiring or PCB mounting with 0.040-inch diameter holes on a 0.300-inch lead spacing. The junction temperature range spans -55°C to 175°C, covering military-temperature applications and high-ambient environments like power supplies or motor drives where the diode sees self-heating during repetitive surge events. ## Unidirectional Zener TVS — one channel, general-purpose transient suppression This is a single-channel unidirectional Zener TVS, meaning it clamps positive transients referenced to ground and conducts in avalanche mode above the breakdown voltage. The general-purpose application tag covers use in secondary surge protection on I/O lines, relay coils, DC motor drivers, and telecom equipment where the 1500W peak pulse rating absorbs occasional transients without sacrificing the 36.8V standoff margin.","metaTitle":"1.5KE43A-T Diodes Inc Zener TVS, 1500W, 36.8V Standoff","metaDescription":"1.5KE43A-T obsolete Zener TVS diode, 1500W peak pulse, 36.8V reverse standoff, DO-201. 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":"Diodes Incorporated","Type":"Zener","Series":"-","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":"1.5KE43","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"40.9V","Voltage - Clamping (Max) @ Ipp":"59.3V","Voltage - Reverse Standoff (Typ)":"36.8V","Current - Peak Pulse (10/1000µs)":"25.3A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b6b9d4121cb66208511919f4a66769e1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE43A-T or check stock?","answer":"The 1.5KE43A-T is sourced through independent distribution as an obsolete part."},{"question":"What is the closest pin-compatible alternative to the 1.5KE43A-T?","answer":"No official successor or pin-compatible cross-reference is recorded for the 1.5KE43A-T. The functional replacement is a different order code from the same 1.5KE series — the 1.5KE43A (base product number 1.5KE43) shares the same DO-201 package and 1500W rating but may differ in tape-and-reel packaging. Confirm the BOM position and the required standoff voltage before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/diodes-inc/1.5KE43A-T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/diodes-inc/1.5KE43A-T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-19T21:33:52.135Z","lastPublished":"2026-07-19T21:33:52.135Z","indexable":true}}