{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE440","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE440","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE440","factsUrl":"https://icboms.com/api/mcp/products/1.5KE440","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE440, 1500W peak pulse power, 376V reverse standoff, 632.1V clamping, DO-201AA axial, through hole, unidirectional.","salesMarkdown":"The 1.5KE440: Its 376V reverse standoff voltage protects 380V DC rails, and the 632.1V maximum clamping voltage limits the transient to a safe level for downstream semiconductors. The 396V minimum breakdown voltage ensures the device starts conducting before the protected circuit sees a damaging overvoltage. The single unidirectional channel suits DC bus or signal-line clamping where polarity is fixed. Housed in a DO-201AA / DO-27 axial leaded package, the 1.5KE440 mounts through hole. The axial body and 0.042-inch diameter leads fit standard 0.100-inch pitch PCB layouts or terminal strips. No power line protection rating — this part is intended for secondary-side transient suppression, not direct mains clamping. The 2.5A peak pulse current at 10/1000µs defines the surge capability; derate for shorter pulses per the datasheet curve. Littelfuse lists the 1.5KE440 as Obsolete. No official successor is recorded. The DO-201 package and 1.5KE series footprint are common, so a parametric substitute (same standoff, similar clamping) may exist; verify the breakdown voltage and pulse rating against the BOM requirement.","metaTitle":"1.5KE440 Littelfuse TVS Diode, 1500W, 376V Standoff, DO-201","metaDescription":"Littelfuse 1.5KE440 Zener TVS diode, 1500W peak pulse power, 376V reverse standoff, 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":"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)":"396V","Voltage - Clamping (Max) @ Ipp":"632.1V","Voltage - Reverse Standoff (Typ)":"376V","Current - Peak Pulse (10/1000µs)":"2.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3617","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE440","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE440 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}}