{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91A-M3/9AT","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91A-M3-9AT","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91A-M3-9AT","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91A-M3%2F9AT","rawCanonicalId":null},"summary":{"shortDescription":"Vishay 1.5SMC91A unidirectional TVS/Zener, 77.8V standoff, 125V clamping max, 12A peak pulse, 1.5kW peak power, DO-214AB SMC, surface mount, tape & reel.","salesMarkdown":"## What the clamping and standoff ratings mean for the protection window The 1.5SMC91A-M3/9AT: The 1.5SMC91A is a unidirectional TransZorb TVS in the DO-214AB SMC package, which means it clamps the protected node at 125 V maximum when a surge arrives, while allowing normal circuit operation up to the 77.8 V reverse standoff — this 47 V gap is the protection window the designer works within. At 77.8 V standoff the device sits below its 86.5 V minimum breakdown threshold and draws only leakage current; once a transient exceeds that threshold the Zener avalanche kicks in and the clamping characteristic holds the node within the 125 V ceiling even as the peak pulse current reaches 12 A. The 1.5 kW peak pulse rating is specified at a 10/1000 µs wave shape — the 10 µs rise time and 1000 µs fall time model a Lightning impulse or inductive kick event; faster transients (ESD, < 1 µs) will produce higher instantaneous peaks that the same energy budget handles differently, so matching the test waveform to your actual threat profile is the critical selection step. ## Junction temperature and board-level integration Rated for -65 to 150 °C junction temperature, the 1.5SMC91A is suited for harsh-environment deployments where the board-level thermal margin matters — a surface-mount DO-214AB sits on a copper pad sized to keep the case temperature below whatever derating curve the application's ambient demands. ## Where a unidirectional TVS in this voltage class fits General-purpose TVS diodes at this voltage and power class protect sensitive electronics on power rails, signal lines, and communications interfaces in industrial and instrumentation equipment — the unidirectional topology is the right choice when the protected node sees only one polarity during normal operation, which covers the majority of DC power bus applications.","metaTitle":"1.5SMC91A-M3/9AT TVS Diode, 125V Clamping, 1.5kW","metaDescription":"Vishay 1.5SMC91A unidirectional TVS, 77.8V standoff, 125V clamping at 12A peak pulse, 1.5kW peak power, -65 to 150°C junction. Active, quoted to order.","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%2F9AT/alternatives.json"},"ai":{"faq":[{"question":"Where can I source 1.5SMC91A-M3/9AT and how do I get a price?","answer":"Sourced and quoted to order against your BOM quantity through independent distribution channels. Submit an RFQ and the supply desk will confirm current pricing and lead time for the tape-and-reel package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91A-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/1.5SMC91A-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}}