{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC39A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC39A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC39A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC39A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5SMC series Zener TVS diode, 1500W peak pulse power, 33.3V reverse standoff, 53.9V clamping, DO-214AB SMC surface mount package.","salesMarkdown":"## What the 1500W rating means on the bench The 1.5SMC39A is a single-direction Zener TVS diode from Littelfuse's 1.5SMC series, rated for 1500 W peak pulse power at 10/1000 µs waveform. That 1500 W figure is the maximum energy it can clamp in a single transient — for a 28.2 A peak pulse current (Ipp), the voltage clamps at 53.9 V max before the part self-destructs. The reverse standoff voltage is 33.3 V, meaning the diode stays off below that rail voltage and only starts conducting when the transient pushes past the 37.1 V minimum breakdown threshold. This makes it a fit for 24 V or 28 V DC buses where you need the clamp to engage before the downstream regulator's abs-max rating. ## Package and field-swap reality The body is large enough to hand-solder with a standard iron if you are careful — no hot-air station required for a board-level repair. Polarity is marked by a cathode band on the body; the anode is the tab side, so orientation is one-look obvious.","metaTitle":"Littelfuse 1.5SMC39A TVS Diode, 1500W, DO-214AB","metaDescription":"Littelfuse 1.5SMC39A Zener TVS diode, 1500W peak pulse power, 33.3V standoff, DO-214AB SMC package. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","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)":"28.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/118f1b70ec0f0941665a20e5472af60a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC39A/alternatives.json"},"ai":{"faq":[{"question":"Is the 1.5SMC39A a unidirectional or bidirectional TVS?","answer":"It is a unidirectional Zener TVS with one channel (anode to cathode). For AC lines or bipolar rails you would need the bidirectional version from the same series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC39A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC39A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}