{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC39AT3","brand":"onsemi","brandSlug":"onsemi","productSlug":"1.5SMC39AT3","canonicalUrl":"https://icboms.com/onsemi/1.5SMC39AT3","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC39AT3","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 1.5SMC39AT3 Zener TVS diode, 1500W peak pulse power, 33.3V reverse standoff, 53.9V clamping, DO-214AB SMC package, single unidirectional channel.","salesMarkdown":"## 1500W Zener TVS in DO-214AB — 33.3V standoff, 53.9V clamp The 1.5SMC39AT3 is a single-channel unidirectional Zener TVS diode from onsemi, rated for 1500W peak pulse power at 10/1000µs. Its 33.3V reverse standoff voltage makes it a fit for protecting 24V DC rails, with a maximum clamping voltage of 53.9V at 28A peak pulse current. Housed in the SMC surface-mount package, it operates over the full -65°C to +150°C junction temperature range — suitable for industrial and outdoor environments where thermal cycling is a concern. ## Obsolete — sourcing via sealed factory reels Onsemi has marked the 1.5SMC39AT3 as Obsolete. For BOM lines still calling this order code, the sourcing path is surplus inventory — sealed factory reels with consistent date-codes are the preferred grade. ## Package and mounting — DO-214AB SMC Surface-mount SMC package with a copper pad area under the cathode tab that directly affects thermal resistance. The supplier device package is also SMC. Available in Tape & Reel (TR) or Cut Tape (CT) options.","metaTitle":"1.5SMC39AT3 onsemi Zener TVS – 1500W, 33.3V Standoff","metaDescription":"onsemi 1.5SMC39AT3 Zener TVS diode, 1500W peak pulse power, 33.3V reverse standoff, 53.9V clamping. Obsolete — source via RFQ for sealed reel lots.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Obsolete","lifecycle_stage":"eol_hot","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":"$0.5800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/67cccc4ec8e3058e4b6b6ee8407ab63e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can 1.5SMC39AT3 be used for 24V applications?","answer":"Yes — the reverse standoff voltage is 33.3V, which is above a nominal 24V rail, so the diode will not conduct during normal operation. The 53.9V clamp provides a reasonable margin for typical 24V system transients."},{"question":"What is the difference between 1.5SMC39AT3 and 1.5SMC39A?","answer":"The 'T3' suffix indicates tape-and-reel packaging. The 1.5SMC39A is the base device without the packaging suffix; electrically they are identical. Both share the same 33.3V standoff, 53.9V clamp, and 1500W rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/1.5SMC39AT3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/1.5SMC39AT3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:13:26.975Z","lastPublished":"2026-07-17T20:13:26.975Z","indexable":true}}