{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1AHE3/57T","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC9.1AHE3-57T","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC9.1AHE3-57T","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1AHE3%2F57T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor Zener/TVS diode, 1.5SMC9.1AHE3/57T, unidirectional, 7.78V standoff, 8.65V min breakdown, 13.4V clamping max @ 112A, 1500W peak pulse, DO-214AB SMC, surface mount, -65°C to 150°C junction, AEC-Q101 automotive, Tape & Reel.","salesMarkdown":"The 1.5SMC9.1AHE3/57T is an AEC-Q101-qualified unidirectional TVS diode — marketed by Vishay as a TransZorb® — in the DO-214AB (SMC) surface-mount package. The automotive grade means it is production-screened for the temperature, humidity, and thermal cycling environments encountered in engine bay and chassis-domain circuits. ## Peak pulse and clamping performance The 7.78 V reverse standoff is the working voltage — the circuit node runs at or below this level under normal conditions. The 1500 W peak pulse rating defines the surge energy the part can absorb once without degradation — the clamping voltage and peak pulse current together set the let-through voltage on the protected node. Budget the clamping voltage against the absolute-maximum rating of whatever is downstream; a 13.4 V clamp is safe for 15 V-rated logic but not for a 12 V analog rail that sits at ±10 % tolerance. ## Thermal margin and board-level fit At 150 °C junction the part is still within its rated SOA, but the clamping voltage rises with temperature, so a design that passes at 25 °C may need a guard band at high ambient. The DO-214AB (SMCJ) footprint is the standard 2-lead SMC package — the cathode stripe marks the direction; the anode is the non-marked lead. Tape-and-reel packaging confirms this is the production-quantity ordering variant, not cut tape.","metaTitle":"1.5SMC9.1AHE3/57T TVS Diode, 7.78V Standoff, 1.5kW Peak","metaDescription":"Vishay 1.5SMC9.1AHE3/57T unidirectional TVS/Zener, 7.78V standoff, 13.4V clamping at 112A, 1500W peak pulse, DO-214AB AEC-Q101. Active.","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":"Automotive, AEC-Q101, 1.5SMC, TransZorb®","Package":"Tape & Reel (TR)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC9.1","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)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"112A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1AHE3%2F57T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative in the 1.5SMC family?","answer":"The 1.5SMC series shares the same DO-214AB package and pinout across voltage variants, so the family is pin-compatible. A voltage-matched alternate must carry the same 9.1 V nominal Zener voltage to match the standoff and clamping performance — check the Vishay cross-reference table for the exact replacement, as different voltage suffixes have different breakdown and clamp levels."},{"question":"What voltage does this part actually clamp at?","answer":"The maximum clamping voltage is 13.4 V at a peak pulse current of 112 A (10/1000 µs). The reverse standoff is 7.78 V typical, and it begins to conduct when the line exceeds the 8.65 V minimum breakdown threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC9.1AHE3-57T","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/1.5SMC9.1AHE3-57T 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}}