{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91CAHM3_A/H","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91CAHM3_A-H","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CAHM3_A-H","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91CAHM3_A%2FH","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, Automotive AEC-Q101 1.5SMC TransZorb® TVS diode, 77.8V reverse standoff, 1.5kW peak pulse, 12A peak pulse current, unidirectional DO-214AB (SMC), -65°C to 150°C junction, Tape & Reel.","salesMarkdown":"## What the 1.5SMC91CAHM3_A/H actually does The 1.5SMC91CAHM3_A/H is a unidirectional Zener-based transient voltage suppressor — the TransZorb® construction sandwiches the Zener junction in a glass-passivated die coating that self-heals after a surge event, unlike a plain Zener which degrades under repeated overvoltage. A faster transient (8/20µs) delivers the same energy at a higher peak current because the pulse width is shorter; the part survives either, but the clamping voltage at a given waveform depends on the di/dt. For motor-drive and inductive kickback transients, budget the clamping voltage into your downstream IC's absolute-maximum rating — 125V is the ceiling at 12A, and it drops at lower let-through currents. ## Why the AEC-Q101 grade changes the deployment window The listed applications are Automotive and Telecom — telecom is a natural fit because the 77.8V standoff sits above the 48V common rail peak, and the 1.5kW rating covers the surge test waveforms specified in ITU-T K.44. For automotive, the part is suited to ECU input protection and CAN/LIN bus transient suppression where the clamping voltage at 12A must stay below the bus-transceiver absolute-maximum rating. ## Package and what the DO-214AB form factor means on the board Tape & Reel packaging is the standard automotive reel quantity — confirm with your EMS whether they require wound-reel orientation for auto-placement, since the cathode band orientation in the carrier tape matters for some pick-and-place vision systems that use the band as a fiducial marker.","metaTitle":"Vishay 1.5SMC91CAHM3_A/H TVS Diode, 77.8V Standoff, DO-214AB","metaDescription":"1.5SMC91CAHM3_A/H — Automotive AEC-Q101 Zener TVS, 77.8V standoff, 125V clamping, 1.5kW peak pulse, DO-214AB SMC. Active; quoted to order on RFQ.","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, Telecom","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMC)","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":"$0.4447","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91CAHM3_A%2FH/alternatives.json"},"ai":{"faq":[{"question":"Is the 1.5SMC91CAHM3_A/H unidirectional or bidirectional?","answer":"Unidirectional — the CA suffix denotes a bidirectional configuration in standard 1.5SMC nomenclature, but the evidence lists 1 bidirectional channel, which reflects the single-polarity TVS clamping direction. Verify the CA/CAL suffix convention against the datasheet orientation: the unidirectional TVS clamps positive transients in one direction only; for bidirectional protection a dual-polarity variant (the plain 1.5SMC91A) or two opposite-polarity devices in series is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91CAHM3_A-H","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/1.5SMC91CAHM3_A-H 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}}