{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE33ARL4G","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE33ARL4G","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE33ARL4G","factsUrl":"https://icboms.com/api/mcp/products/1.5KE33ARL4G","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. Mosorb™ series Zener TVS diode, 1.5KE33ARL4G, 1500W peak pulse power, 28.2V reverse standoff, 45.7V clamping, DO-201AD axial, through-hole, tape and reel.","salesMarkdown":"## 1500 W peak pulse — the rating that decides the protection window The 1.5KE33ARL4G: That 1500 W figure is the energy-handling ceiling — it tells you how much transient energy the diode can clamp before the junction fails. For a 28.2 V standoff rail, the 45.7 V clamping voltage (max at 33 A peak pulse current) defines the voltage the downstream circuitry must survive. ## Obsolete — sourcing through independent channels Littelfuse has marked the 1.5KE33ARL4G as obsolete. No official successor is listed. The through-hole DO-201AD axial package is a legacy footprint, so a board-level replacement would require a layout change if migrating to a surface-mount TVS. ## 28.2 V standoff, 31.4 V breakdown — the protection band The reverse standoff voltage is 28.2 V — the rail voltage the diode sits across without conducting. Breakdown starts at 31.4 V min, and clamping is guaranteed at 45.7 V max at the 33 A peak pulse current. The single unidirectional channel handles one polarity; for AC or bidirectional protection, two devices or a bidirectional part would be needed. ## -65 °C to 175 °C — fits harsh thermal environments Operating junction temperature spans -65 °C to 175 °C, which covers most industrial, automotive, and telecom enclosures without derating concerns. The through-hole axial package (DO-201AD) is a familiar leaded form factor — it hand-solders easily and the leads absorb some mechanical strain in high-vibration settings, though the tape-and-reel packaging suggests it was originally intended for automated insertion.","metaTitle":"1.5KE33ARL4G Littelfuse Mosorb™ Zener TVS, 1500W, 28.2V","metaDescription":"Littelfuse 1.5KE33ARL4G Zener TVS diode, 1500W peak pulse, 28.2V standoff, DO-201AD axial. Obsolete — sourced to order against RFQ through independent channels.","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)","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)":"31.4V","Voltage - Clamping (Max) @ Ipp":"45.7V","Voltage - Reverse Standoff (Typ)":"28.2V","Current - Peak Pulse (10/1000µs)":"33A"}},"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 is the 1.5KE33ARL4G's type and series?","answer":"It is a Zener-type TVS diode from the Mosorb™ series. The Zener structure gives a sharp breakdown characteristic, which means the clamping voltage stays tight across the pulse current range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE33ARL4G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE33ARL4G 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}}