{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE400A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE400A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE400A","factsUrl":"https://icboms.com/api/mcp/products/1.5KE400A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series TVS diode, Type Zener, 1500W peak pulse power, 342V reverse standoff, 548V clamping, DO-201AA axial package, 1.5KE400A.","salesMarkdown":"## Clamping voltage and transient energy rating The 1.5KE400A is a 1500W (1.5kW) peak pulse power TVS diode from the Littelfuse 1.5KE series, designed to clamp transients on DC power rails or signal lines operating up to 342V continuously. The 342V reverse standoff voltage means the diode draws negligible leakage current below that threshold, making it suitable for 300V or 340V nominal DC buses where the margin to breakdown is about 38V. ## Package and board integration Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE400A mounts through-hole on the PCB — the body diameter and lead spacing are standard for this power level, and the axial form factor allows either vertical or horizontal mounting depending on board layout constraints. The through-hole package requires a drilled hole and wave-solder process; the DO-201 footprint is shared across the 1.5KE series, so a single PCB land pattern serves the whole family from lower to higher voltage variants. The wide temperature range means the clamping voltage and leakage current remain within specification across the full military-temperature band — no derating needed for cold starts at -40°C or sustained operation at 150°C junction.","metaTitle":"1.5KE400A Littelfuse TVS Diode, 1500W, DO-201","metaDescription":"1.5KE400A Littelfuse Zener TVS diode, 1500W peak pulse power, 342V standoff, 548V clamp, DO-201 axial. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","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","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"380V","Voltage - Clamping (Max) @ Ipp":"548V","Voltage - Reverse Standoff (Typ)":"342V","Current - Peak Pulse (10/1000µs)":"2.8A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum continuous DC voltage the 1.5KE400A can handle without conducting?","answer":"The reverse standoff voltage is 342V typical. Below this DC voltage the diode draws only leakage current; above it, breakdown begins and the diode starts clamping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE400A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE400A 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}}