{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE400","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE400","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE400","factsUrl":"https://icboms.com/api/mcp/products/1.5KE400","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE400, 342V reverse standoff, 575.4V clamp, 1.5kW peak pulse, DO-201AA axial, through hole.","salesMarkdown":"## Obsolete — sourcing through independent channels The 1.5KE400 is officially obsolete per Littelfuse. ## Clamping and breakdown ratings for 342V rails The 342 V reverse standoff means the diode draws negligible leakage below that rail voltage — it stays out of the circuit during normal operation and only conducts when a surge pushes the line above the breakdown threshold. ## DO-201 axial package and temperature range Housed in a DO-201AA (DO-27) axial-lead package, through-hole mounted. No power-line protection rating — this is a general-purpose transient suppressor for signal or DC bus protection, not for AC mains primary-side clamping.","metaTitle":"1.5KE400 Littelfuse TVS Diode, 342V Standoff, 1.5kW","metaDescription":"Littelfuse 1.5KE400 Zener TVS diode, obsolete. 342V reverse standoff, 575.4V clamp, 1.5kW peak pulse. Sourced to order against RFQ.","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","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"360V","Voltage - Clamping (Max) @ Ipp":"575.4V","Voltage - Reverse Standoff (Typ)":"342V","Current - Peak Pulse (10/1000µs)":"2.8A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE400/alternatives.json"},"ai":{"faq":[{"question":"How can I source the 1.5KE400 now that it is obsolete?","answer":"The 1.5KE400 is discontinued by Littelfuse. No official successor is listed, so the BOM line relies on surplus inventory."},{"question":"What are the key clamping specs for the 1.5KE400?","answer":"342 V reverse standoff, 360 V minimum breakdown, 575.4 V maximum clamping at 2.8 A peak pulse current (10/1000 µs waveform). Peak pulse power is 1500 W (1.5 kW)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE400","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE400 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}}