{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91AHE3/57T","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91AHE3-57T","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3-57T","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHE3%2F57T","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor Zener TVS diode, 1.5SMC91AHE3/57T, unidirectional, 1500W peak pulse, 77.8V standoff, 125V clamping @ 12A, DO-214AB SMC, AEC-Q101 automotive, surface mount, Tape & Reel.","salesMarkdown":"## What the clamping ratings mean for automotive protection The 1.5SMC91AHE3/57T: The 77.8 V reverse standoff is the working rail the TVS sees uninterrupted — the diode stays off and draws only leakage current until a transient pushes it into avalanche. For a 12 V automotive rail, 77.8 V standoff gives plenty of margin against normal operation while clamping inductive load dumps and ESD events to a survivable level. ## 1500 W peak pulse — sizing for real-world transients The 12 A peak pulse current rating at that same waveform ties directly to the clamping ceiling: at 12 A the voltage across the diode is held at or below 125 V. If the transient delivers more current, the diode may survive briefly above rating but the clamping voltage will exceed 125 V, so the downstream circuit's transient-withstand margin must be checked independently. ## AEC-Q101 grade and junction temperature range Qualified to AEC-Q101 for automotive deployment — the stress testing covers temperature cycling, humidity bias, and surge life that commercial TVS diodes skip. For a chassis-mounted ECU that sees -40 °C startup, the 150 °C Tj ceiling still leaves headroom after the clamping event raises die temperature above ambient. ## DO-214AB SMC package and automotive board assembly The DO-214AB (SMCJ) package is the standard form factor for 1500 W TVS diodes — the foot pattern accepts reflow profiles up to the peak temperature the automotive qualification mandates. Tape-and-reel packaging suits high-volume pick-and-place assembly. The unidirectional single-channel topology means the cathode connects to the rail to be protected; the anode goes to ground.","metaTitle":"Vishay 1.5SMC91AHE3/57T TVS Diode, 1500W, 77.8V standoff","metaDescription":"Vishay 1.5SMC91AHE3/57T unidirectional TVS diode, 1500W peak pulse at 10/1000µs, 77.8V standoff / 125V clamping. AEC-Q101 automotive. 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":"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":"1.5SMC91","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHE3%2F57T/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5SMC91AHE3/57T in this Circuit Protection family?","answer":"Pin-compatible alternatives would share the DO-214AB foot pattern and the same standoff voltage grade within the 1.5SMC series — confirm the 77.8 V standoff and 125 V clamping ceiling match before substituting, as TVS diodes with the same package but different standoff ratings protect different rail voltages."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3-57T","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/1.5SMC91AHE3-57T 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}}