{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE18AG","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE18AG","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE18AG","factsUrl":"https://icboms.com/api/mcp/products/1.5KE18AG","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. Mosorb™ series, Zener TVS diode, 1.5KE18AG, 1500W peak pulse power, 15.3V reverse standoff, 25.2V clamping, 59.5A peak pulse current, DO-201AD axial, through-hole.","salesMarkdown":"## What the 1.5KE18AG is and why it matters on a repair bench When a surge hits, it breaks down at 17.1 V minimum and clamps at 25.2 V maximum while shunting 59.5 A of peak pulse current (10/1000 µs waveform). That 25.2 V clamp ceiling is the number that decides whether the downstream IC survives — if the protected device's abs-max rating sits below that, the TVS is the wrong pick. This is a unidirectional part — one channel, cathode band on the body — so it protects a single rail against positive-going transients referenced to ground. The DO-201AD axial-lead package means it installs through-hole on a board or terminal strip; the scorch mark on a dead board often traces back to a TVS that took the hit and shorted, saving the rest of the circuit. ## Lifecycle reality: obsolete, but still sourcable The 1.5KE18AG carries an Obsolete lifecycle status from Littelfuse. That means the manufacturer has stopped production — no last-time-buy window remains open. The part is not coming back through the factory channel. For a repair bench or a BOM that already has this on the board, the supply route is independent distribution. ## Temperature range and deployment context That military-grade span covers outdoor telecom cabinets, engine-bay electronics, and downhole instrumentation — anywhere a 15.3 V rail needs transient protection in a harsh thermal environment. The through-hole axial package (DO-201AD) is a workhorse for point-to-point wiring or PCB mounting where the board can tolerate the lead bend. No power-line protection feature is built in — this is a standalone transient suppressor, not a filtered or coordinated protector.","metaTitle":"Littelfuse 1.5KE18AG Mosorb TVS, 1.5kW, 15.3V Standoff","metaDescription":"Littelfuse 1.5KE18AG obsolete Mosorb Zener TVS diode, 1500W peak pulse, 15.3V standoff, DO-201AD axial.","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":"Bulk","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)":"17.1V","Voltage - Clamping (Max) @ Ipp":"25.2V","Voltage - Reverse Standoff (Typ)":"15.3V","Current - Peak Pulse (10/1000µs)":"59.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b2bad05ac2a782d44789dbfb00c46ecc.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the 1.5KE18AG or check current availability?","answer":"The 1.5KE18AG is obsolete but available through independent distribution."},{"question":"What is the closest pin-compatible alternative to the 1.5KE18AG?","answer":"A functional replacement would need the same 15.3 V reverse standoff, 1500 W peak pulse rating, and DO-201AD axial package. Cross-reference against other TVS families with those three parameters at RFQ time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE18AG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE18AG 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}}