{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE43C","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE43C","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE43C","factsUrl":"https://icboms.com/api/mcp/products/1.5KE43C","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE Series bidirectional TVS diode, Type Zener, 1500W peak pulse, 36.8V reverse standoff, DO-201AA/DO-27 axial package, Through Hole, Tape & Reel.","salesMarkdown":"## 1500W peak pulse — the transient survival ceiling The 1.5KE43C: The 62.27 V maximum clamping voltage at 25.6 A peak pulse current (10/1000 µs waveform) defines the voltage the downstream circuitry must survive — anything above that and the protected device sees the clamp ceiling, not the transient peak. ## DO-201 axial — a through-hole standard for board-level protection Housed in the DO-201AA / DO-27 axial package, the 1.5KE43C is a through-hole device that mounts with a single drilled hole and solder joint per lead. The axial lead form factor is common in power-entry protection stages — the leads carry the surge current into the die with minimal added inductance compared to a surface-mount part. ## Obsolete — sourced through distribution, not the factory Littelfuse lists the 1.5KE43C as obsolete. For a BOM that already carries this part number, the procurement path is straightforward: submit the quantity and target lead time, and the distributor confirms lot traceability and manufacturer warranty from the available surplus or last-time-buy inventory. No design-in for new builds — the 1.5KE series has been superseded by newer TVS families with higher surge ratings or smaller packages.","metaTitle":"Littelfuse 1.5KE43C TVS Diode, 1500W, 36.8V Standoff","metaDescription":"Littelfuse 1.5KE43C bidirectional TVS, 1500W peak pulse, 36.8V standoff, DO-201. Obsolete — sourced to order. RFQ for availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","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":"1.5KE","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"38.75V","Voltage - Clamping (Max) @ Ipp":"62.27V","Voltage - Reverse Standoff (Typ)":"36.8V","Current - Peak Pulse (10/1000µs)":"25.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7081","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does 1.5KE43C use and how does it mount?","answer":"It uses the DO-201AA / DO-27 axial leaded package, a through-hole form factor. The axial leads are soldered into plated through-holes on the PCB — a standard footprint for power-entry transient protection stages."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE43C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE43C 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}}