{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91AHE3/9AT","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91AHE3-9AT","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3-9AT","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHE3%2F9AT","rawCanonicalId":null},"summary":{"shortDescription":"Vishay 1.5SMC91AHE3/9AT unidirectional TVS diode, 77.8V standoff, 125V clamping @ 12A peak pulse, 1.5 kW peak pulse power, DO-214AB (SMC) surface-mount, AEC-Q101 qualified.","salesMarkdown":"## Clamping and standoff — what the numbers decide The 1.5SMC91AHE3/9AT: Reverse standoff is 77.8 V nominal — below this voltage the TVS appears high-impedance and draws only leakage current, leaving the protected rail undisturbed during normal operation. The 47 V gap between standoff and clamping ceiling is the clamping ratio that determines how much stress the protected load absorbs — tighter designs use tighter standoff-to-breakdown margins to reduce clamping stress on sensitive automotive semiconductors. ## Automotive thermal and qualification context Junction temperature range is -65 °C to 150 °C — this covers engine-bay ambient swings and cold-start transients without derating the clamping performance. AEC-Q101 qualification means the part passed humidity, temperature cycling, and surge stress per the automotive council stress test qualification — a harder screen than the commercial JEDEC suite. The unidirectional channel count of one means this part clamps one polarity only — for bidirectional protection in AC-coupled rails you need a bidirectional TVS or two in reverse series. Supplied on tape and reel per EIA-481 — the standard 330 mm reel fits standard SMT line feeders without special pitch or orientation requirements. ## Sourcing and lifecycle The part is listed Active by Vishay General Semiconductor — Diodes Division, sourced through independent distribution against BOM quantities.","metaTitle":"Vishay 1.5SMC91AHE3/9AT TVS Diode, 125V Clamping","metaDescription":"Vishay 1.5SMC91AHE3/9AT unidirectional TVS diode, 77.8V standoff, 125V clamping @ 12A peak pulse, AEC-Q101 qualified. Active production — 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%2F9AT/alternatives.json"},"ai":{"faq":[{"question":"How do I source 1.5SMC91AHE3/9AT and get a quote?","answer":"Submit an RFQ and the supply desk will confirm pricing and lead time against the BOM quantity — sourced through independent distribution with full traceability to an authorized channel."},{"question":"Is there a pin-compatible alternative in the 1.5SMC family?","answer":"The 1.5SMC91 base part number covers multiple voltage variants across the same SMC footprint; the pinout is shared, but the standoff and clamping ratings shift with each voltage grade — verify the protected rail voltage before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3-9AT","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/1.5SMC91AHE3-9AT 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}}