{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1ARL4G","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE9.1ARL4G","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1ARL4G","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1ARL4G","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Mosorb™ series, Zener TVS diode, DO-201AD axial package, 1500W peak pulse power, 7.78V reverse standoff, 13.4V clamping, unidirectional.","salesMarkdown":"## Obsolete — last-time-buy sourcing The 1.5KE9.1ARL4G is listed as Obsolete by Littelfuse, meaning the manufacturer has ended production. Available through independent distribution channels; quantities are confirmed at RFQ. This is a surplus/broker sourcing path — each lot is traceable and verified against the original Littelfuse specifications. ## What the ratings mean for your protection design Reverse standoff voltage of 7.78V means the diode is effectively invisible to the circuit below that DC level, drawing negligible leakage. Breakdown occurs at 8.65V minimum, triggering the clamping action. Unidirectional, single-channel Zener — the cathode band on the DO-201AD body must be oriented toward the positive rail. DO-201AD axial leaded package — the body diameter is 5.3 mm typical, with 0.96 mm diameter leads. Through-hole mounting; the lead spacing on a standard PCB footprint is 10.2 mm. The axial form factor allows hand-insertion or wave-solder assembly. Available in Tape & Reel (TR) or Cut Tape (CT) packaging options — the TR variant is suited for automated insertion; CT is preferred for prototype or low-volume builds.","metaTitle":"1.5KE9.1ARL4G Littelfuse TVS Diode, 1500W, 7.78V Standoff","metaDescription":"Littelfuse 1.5KE9.1ARL4G Mosorb™ TVS, 1500W peak pulse, 7.78V standoff, 13.4V clamp. Obsolete — sourced to order. RFQ for availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"Mosorb™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"112A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b2bad05ac2a782d44789dbfb00c46ecc.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does 1.5KE9.1ARL4G use?","answer":"DO-201AD axial leaded package. It is a through-hole component with 0.96 mm diameter leads, suitable for wave-solder or hand-solder assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE9.1ARL4G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE9.1ARL4G 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}}