{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91A-M3/57T","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91A-M3-57T","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91A-M3-57T","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91A-M3%2F57T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, 1.5SMC TransZorb® series, unidirectional TVS/Zener diode, 1SAP130100R0170 order code, 77.8V standoff, 1500W peak pulse, DO-214AB SMC surface-mount, Tape & Reel.","salesMarkdown":"## 125V clamping at 12A peak — what the protection chain means The 1.5SMC91A-M3/57T clamps a 12 A peak pulse (10/1000 µs waveform) to 125 V maximum, while the reverse standoff sits at 77.8 V typical — the margin between standoff and clamping is the absorbed transient headroom. A strike at or above 86.5 V minimum breakdown initiates conduction, routing the surge current away from the protected load. 1500 W peak pulse rating in the 10/1000 µs regime is the standard TVS surge-withstand figure — it defines what the part survives without degradation. The DO-214AB (SMC) package handles the thermal path from junction to board copper; adequate landing-pad area under the cathode tab is the layout constraint. ## TransZorb® vs a standard Zener — the protection framing Listed as Type Zener, but Vishay's TransZorb® branding places this in the TVS suppressor class — optimised for transient clamping rather than DC regulation. The unclamped inductive-spike behaviour and the peak-pulse power rating are the distinguishing specs; a standard Zener datasheet would not carry a 10/1000 µs surge waveform rating. Unidirectional, single-channel — it clamps one polarity only. For AC lines or dual-polarity rails a bidirectional TVS would be required; this part is the single-polarity building block. ## Thermal envelope and production status Junction temperature range is -65°C to 150°C (TJ), giving the part headroom for high-ambient or poorly ventilated enclosures. The 150°C ceiling is the absolute limit — the clamping event itself generates junction heat per the energy rating, so repetitive transients above the single-pulse rating require derating.","metaTitle":"Vishay 1.5SMC91A-M3/57T, 1500W TVS Zener, 77.8V standoff","metaDescription":"Vishay 1.5SMC91A-M3/57T Zener/TVS diode — 77.8V standoff, 125V clamping, 1500W peak pulse, DO-214AB SMC surface-mount.","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":"1.5SMC91","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)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12A"}},"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/1.5SMC91A-M3%2F57T/alternatives.json"},"ai":{"faq":[{"question":"Where can I source 1.5SMC91A-M3/57T and what is the typical lead time?","answer":"Tape & Reel packaging is the standard format for this DO-214AB SMC part."},{"question":"What is the 1.5SMC91A-M3/57T used for?","answer":"As a unidirectional TVS (listed as Zener type), it protects downstream circuitry from voltage transients on the primary rail it guards — general-purpose applications where the 77.8 V standoff voltage matches the operating rail headroom."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91A-M3-57T","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/1.5SMC91A-M3-57T 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}}