{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE18-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE18-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE18-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE18-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE18-B, 1500W peak pulse power, 15.3V reverse standoff, 16.2V breakdown, 26.46V clamping, 60.3A peak pulse current, DO-201AA/DO-27 axial package, bulk.","salesMarkdown":"## 1.5kW Zener TVS in DO-201 — what the ratings mean for the board The 1.5KE18-B: The 15.3 V reverse standoff voltage means the part stays in high-impedance mode on a nominal 12 V or 15 V rail and only starts conducting when the transient exceeds 16.2 V (the minimum breakdown). Clamping is specified at 26.46 V at 60.3 A peak pulse current — that 26.46 V ceiling is what the downstream silicon sees during the surge event, so the downstream device's abs-max rating must sit above that number. The DO-201AA / DO-27 axial-lead package (supplier device package DO-201) is a through-hole form factor that handles the thermal pulse of a 1.5 kW surge without lifting the junction above the rated -55°C to 175°C range. The bulk packaging means it ships loose in a bag or tube — no reel, so it feeds into a wave-solder or hand-insertion line, not a pick-and-place. ## Obsolete — sourcing reality for the BOM line Littelfuse lists the 1.5KE18-B as Obsolete. No pin-compatible direct replacement from Littelfuse is documented, so a functional alternative would require a parametric match on standoff voltage, clamping voltage, and package footprint.","metaTitle":"Littelfuse 1.5KE18-B Zener TVS, 1.5kW, 15.3V Standoff","metaDescription":"Littelfuse 1.5KE18-B Zener TVS diode, 1500W peak pulse, 15.3V reverse standoff, DO-201. 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)":"16.2V","Voltage - Clamping (Max) @ Ipp":"26.46V","Voltage - Reverse Standoff (Typ)":"15.3V","Current - Peak Pulse (10/1000µs)":"60.3A"}},"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 pin-compatible alternative to 1.5KE18-B in the 1.5KE series?","answer":"No official pin-compatible successor is documented by Littelfuse for this specific breakdown voltage. A functional replacement would need to match the 15.3 V reverse standoff, 16.2 V minimum breakdown, 26.46 V clamping, and DO-201 package — a parametric search across the 1.5KE family or a different TVS series is the practical path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE18-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/1.5KE18-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}}