{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE300-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE300-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE300-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE300-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE300-B, 1500W peak pulse power, 434.7V clamping, DO-201AA axial, bulk.","salesMarkdown":"## What the ratings mean for the BOM The 1.5KE300-B: The 256 V reverse standoff voltage means the diode stays off below that line voltage — it won't leak or clamp during normal 240 VAC or 250 VDC rail operation. The DO-201 package's axial leads carry the heat into the board; a short lead length and generous pad area improve the thermal coupling. The 1.5KE300-B is marked obsolete by Littelfuse. No pin-compatible drop-in from the same manufacturer is documented, so a board-level redesign may be needed if a functional replacement is required.","metaTitle":"1.5KE300-B Littelfuse TVS Diode, 1500W, DO-201","metaDescription":"Littelfuse 1.5KE300-B Zener TVS diode, 1500W peak pulse power, 434.7V clamping, DO-201 axial. Obsolete — 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":"Bulk","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)":"270V","Voltage - Clamping (Max) @ Ipp":"434.7V","Voltage - Reverse Standoff (Typ)":"256V","Current - Peak Pulse (10/1000µs)":"3.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE300-B/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE300-B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE300-B 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}}