{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC51A-M3/9AT","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC51A-M3-9AT","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC51A-M3-9AT","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC51A-M3%2F9AT","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, 1.5SMC series TransZorb®, Zener TVS diode, 1.5SMC51A-M3/9AT, 1500W peak pulse power, 43.6V reverse standoff, 70.1V clamping, DO-214AB SMC package, Tape & Reel.","salesMarkdown":"## 1500W surge clamp for a 43.6V rail The 1.5SMC51A-M3/9AT: With a 43.6V reverse standoff voltage, it protects a nominal 36V or 42V DC rail — common in industrial power supplies, telecom rectifiers, and automotive battery lines — by clamping transients to 70.1V maximum before the downstream regulator or converter sees the spike. ## Breakdown window and clamping margin Breakdown voltage starts at 48.5V minimum, so the diode stays off below that threshold and only conducts during an overvoltage event. The clamping voltage at 21.4A peak pulse current is 70.1V max — that 21.6V window between breakdown and clamp gives the TVS headroom to handle the surge without letting the rail exceed the downstream device's abs-max rating. The single unidirectional channel means cathode goes to the protected rail, anode to ground — polarity matters in layout. No power line protection feature (it's a standard TVS, not a rail-to-rail clamp array), so it's best paired with a series fuse or PTC on the input side for sustained overvoltage events.","metaTitle":"1.5SMC51A-M3/9AT TVS Diode, 1500W, 43.6V Standoff, DO-214AB","metaDescription":"Vishay 1.5SMC51A-M3/9AT Zener TVS diode, 1500W peak pulse power, 43.6V reverse standoff, 70.1V clamping. Active lifecycle, DO-214AB SMC package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"1.5SMC, TransZorb®","Package":"Tape & Reel (TR)","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":"1.5SMC51","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"48.5V","Voltage - Clamping (Max) @ Ipp":"70.1V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"21.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3333","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC51A-M3%2F9AT/alternatives.json"},"ai":{"faq":[{"question":"What is the 1.5SMC51A-M3/9AT's peak pulse power rating?","answer":"That means it can absorb a 21.4A surge for 1ms without failing, clamping the rail to 70.1V max."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC51A-M3-9AT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC51A-M3-9AT 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}}