{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE12-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE12-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE12-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE12-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1500W peak pulse power, 10.2V reverse standoff, 10.8V breakdown, 17.54V clamping, 91A peak pulse current, DO-201AA axial, Bulk.","salesMarkdown":"Littelfuse has marked the 1.5KE12-B as obsolete. ## Clamping performance and protection envelope The 10.2 V reverse standoff means the diode stays in standby below that DC voltage — it only conducts during the overvoltage event. Breakdown occurs at 10.8 V minimum, giving a narrow guard band between the nominal rail and the clamping threshold — useful for protecting 12 V buses where the regulation tolerance is tight. ## Package and integration note Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE12-B mounts through-hole. The DO-201 footprint is standard across the 1.5KE series, so a board already laid out for a sibling in this family accepts this part without a layout change.","metaTitle":"1.5KE12-B Littelfuse TVS Diode, 1500W, DO-201","metaDescription":"1.5KE12-B Littelfuse Zener TVS, 1500W peak pulse, 10.2V standoff, DO-201. Obsolete status. Sourced to order against RFQ through independent distribution.","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)":"10.8V","Voltage - Clamping (Max) @ Ipp":"17.54V","Voltage - Reverse Standoff (Typ)":"10.2V","Current - Peak Pulse (10/1000µs)":"91A"}},"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/1.5KE12-B/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to the 1.5KE12-B in the same family?","answer":"The 1.5KE series shares the same DO-201 package and 1500 W peak pulse rating across multiple voltage variants. A direct functional replacement requires matching the 10.2 V standoff, 10.8 V breakdown, and 17.54 V clamping — any sibling with those same thresholds is a drop-in fit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE12-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/1.5KE12-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}}