{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE22-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE22-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE22-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE22-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series Zener TVS diode, 1.5KE22-B, 1500W peak pulse power, 18.8V reverse standoff, 19.8V breakdown, 32.13V clamping, DO-201AA/DO-27 axial, through hole, bulk.","salesMarkdown":"## What this 1500 W axial TVS does on the board The 1.5KE22-B: It clamps transients at 32.13 V maximum when the surge current hits 49.7 A, protecting downstream silicon from overvoltage events like inductive kickback, lightning-coupled surges, or ESD strikes on a 18.8 V nominal rail. The reverse standoff voltage of 18.8 V means the diode stays high-impedance below that level and only starts conducting when the transient exceeds the 19.8 V minimum breakdown threshold. ## Package, mounting, and temperature range Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the 1.5KE22-B is a through-hole part intended for hand-insertion or wave-solder assembly. The axial leads let it sit flat against the board or stand off for better airflow — the thermal path is through the leads, so the copper pad area on the PCB matters for derating at high ambient. ## Sourcing an obsolete TVS diode Littelfuse lists the 1.5KE22-B as obsolete. No pin-compatible direct replacement from Littelfuse has been published, so a BOM substitution would require verifying the clamping voltage and package fit against the original design.","metaTitle":"Littelfuse 1.5KE22-B TVS Diode, 1500W, DO-201","metaDescription":"Littelfuse 1.5KE22-B Zener TVS diode, 1500W peak pulse power, 18.8V standoff, DO-201 axial. Obsolete; sourced to order. Request a quote.","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)":"19.8V","Voltage - Clamping (Max) @ Ipp":"32.13V","Voltage - Reverse Standoff (Typ)":"18.8V","Current - Peak Pulse (10/1000µs)":"49.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to the 1.5KE22-B?","answer":"A functional replacement would need to match the 1500 W peak pulse power, 18.8 V standoff, and DO-201 axial package. Confirm the clamping voltage and breakdown range against the original BOM requirement before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE22-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/1.5KE22-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}}