{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1C-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE9.1C-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1C-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1C-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE9.1C-B, 1500W peak pulse power, bidirectional, 7.78V standoff, 8.17V breakdown, 14.07V clamping, DO-201AA/DO-27 axial package, bulk.","salesMarkdown":"## 1500 W bidirectional TVS — protection window and lifecycle read The 1.5KE9.1C-B: Bidirectional clamping means it protects symmetrical signal lines — AC power or bipolar data buses — where the transient can swing positive or negative relative to ground. The protection window is defined by a 7.78 V reverse standoff (the maximum DC voltage the line can carry without the diode conducting), an 8.17 V minimum breakdown voltage (where clamping starts), and a 14.07 V maximum clamping voltage at the 113.4 A peak pulse current. This translates to a clamp factor of roughly 1.8× the standoff — tight enough to protect downstream 12 V-rated silicon from transients. The DO-201AA (DO-27) axial-lead package suits through-hole board mounting where the lead bends absorb mechanical stress during wave solder. ## Sourcing an obsolete TVS — where the 1.5KE9.1C-B sits in the cycle The 1.5KE series is a long-running TVS family with many voltage variants still active, but the bidirectional 9.1 V version (C suffix) is discontinued. A parametric replacement would need to match the 1500 W peak pulse rating, the 7.78 V standoff, and the bidirectional configuration in the same DO-201 package — a board-level spin is not required if the replacement is pin-compatible, but no direct cross-reference is documented here.","metaTitle":"Littelfuse 1.5KE9.1C-B TVS Diode, 1500W, Bidirectional","metaDescription":"Littelfuse 1.5KE9.1C-B Zener TVS diode, 1500W peak pulse power, bidirectional, DO-201 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":"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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"8.17V","Voltage - Clamping (Max) @ Ipp":"14.07V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"113.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE9.1C-B?","answer":"The 1.5KE9.1C-B is obsolete and sourced through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1C-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/1.5KE9.1C-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}}