{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE220","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE220","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE220","factsUrl":"https://icboms.com/api/mcp/products/1.5KE220","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE220, 1500W peak pulse power, 185V reverse standoff, 344.4V clamping, unidirectional, DO-201AA axial, through-hole.","salesMarkdown":"## What the 1500 W rating means in a real circuit The 1.5KE220: In a 24 VAC or 185 VDC rail, the 185 V reverse standoff means it sits transparently below the clamping threshold, only conducting when the line sees a surge. The 344.4 V maximum clamping voltage at 4.6 A peak pulse current is the ceiling the downstream components see — keep that below the absolute max of whatever you are protecting. ## Breakdown, standoff, and the field-swap reality Breakdown voltage starts at 198 V, so a 185 V nominal rail has about 13 V of headroom before the diode starts to avalanche — enough to ride through normal ripple without clipping. The DO-201AA axial package is a through-hole part, which means it can be swapped on site with a soldering iron and a desoldering pump. No hot-air station needed; the banded cathode marking is clear enough to get orientation right the first time. The 1500 W rating holds across that range, though derating curves apply above 25°C ambient. ## Obsolete — sourcing through independent channels Littelfuse lists the 1.5KE220 as obsolete. If you are filling a BOM line or repairing a legacy board, this is a part you source per order, not from factory stock.","metaTitle":"Littelfuse 1.5KE220 TVS Diode, 1500W, 185V Standoff, DO-201","metaDescription":"Littelfuse 1.5KE220 Zener TVS diode, 1500W peak pulse power, 185V reverse standoff, 344.4V clamping. Obsolete — sourced to order via RFQ. DO-201 axial package.","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)":"198V","Voltage - Clamping (Max) @ Ipp":"344.4V","Voltage - Reverse Standoff (Typ)":"185V","Current - Peak Pulse (10/1000µs)":"4.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1612","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the 1.5KE220's peak pulse power rating?","answer":"1500 W (1.5 kW) at 10/1000 µs waveform. That is the maximum transient energy the diode can absorb in a single pulse before failure. The clamping voltage at that peak current is 344.4 V."},{"question":"What package does the 1.5KE220 come in?","answer":"DO-201AA, DO-27, Axial, also referred to as DO-201. It is a through-hole package with axial leads — field-serviceable with a standard soldering iron."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE220","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE220 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}}