{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC39AT3G","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC39AT3G","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC39AT3G","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC39AT3G","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5SMC series Zener TVS diode, 1.5SMC39AT3G, 1500W peak pulse power, 33.3V standoff, unidirectional, DO-214AB SMC package, Tape & Reel.","salesMarkdown":"The 1.5SMC39AT3G: It clamps at 53.9V max with a 28A peak pulse current, protecting downstream circuitry from overvoltage transients on a 33.3V nominal rail. This is a unidirectional device (one channel) with a minimum breakdown voltage of 37.1V. It is not intended for power-line protection — the internal structure is optimized for signal and DC rail transients. Littelfuse lists the 1.5SMC39AT3G as Obsolete. For existing BOM lines, this part is sourced through independent distribution channels — quantities are lot-specific and confirmed at RFQ. No stock-holding claim; availability and pricing are quoted per order. ## Package and board-fit considerations The DO-214AB (SMC) body measures about 7.1 mm long by 6.2 mm wide — a standard footprint for this power class. The cathode band marks polarity; rework with hot air is straightforward if the pad layout matches the recommended land pattern. The SMC package's larger body compared to SMA/SMB means it handles the 1500W pulse without exceeding the junction temperature limit in most layouts.","metaTitle":"1.5SMC39AT3G Littelfuse TVS Diode, 1500W, DO-214AB","metaDescription":"Littelfuse 1.5SMC39AT3G Zener TVS diode, 1500W peak pulse power, 33.3V standoff, DO-214AB SMC. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5SMC","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"37.1V","Voltage - Clamping (Max) @ Ipp":"53.9V","Voltage - Reverse Standoff (Typ)":"33.3V","Current - Peak Pulse (10/1000µs)":"28A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ea97bb520e37528ab309c554c0bb147d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC39AT3G/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5SMC39AT3G?","answer":"A functional replacement would require a similar 1500W, 33.3V standoff TVS in DO-214AB — confirm the breakdown voltage window and clamping voltage against the BOM requirement before substituting."},{"question":"What compliance documentation does Littelfuse provide for 1.5SMC39AT3G?","answer":"The part is listed under the Littelfuse 1.5SMC series, which typically carries RoHS and REACH compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC39AT3G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC39AT3G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T09:03:48.052Z","lastPublished":"2026-07-21T09:03:48.052Z","indexable":true}}