{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1CAHR7G","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5SMC9.1CAHR7G","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC9.1CAHR7G","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1CAHR7G","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor 1.5SMC bidirectional Zener TVS, 7.78V standoff, 13.4V clamping @ 117A, 1500W peak pulse, AEC-Q101, DO-214AB surface mount, -55°C to 150°C.","salesMarkdown":"## Clamping performance at the transient event The 1.5SMC9.1CAHR7G: The reverse standoff sits at 7.78 V typ, so the line idles cleanly below the breakdown threshold. Breakdown triggers no lower than 8.65 V, which means there is a 0.87 V window between nominal standoff and guaranteed turn-on — tight enough for 5 V rails but wide enough that noise immunity is not compromised in an automotive environment. The 1500 W peak pulse rating defines the energy the SMC package can absorb in the 10/1000 µs surge window. This is the 1.5 kW rating that puts the 1.5SMC family above the 500 W 5SMC class — you need it when protecting ECU supply rails against the ISO 7637-2 transient amplitudes that occur at the battery terminals. ## Automotive grade and thermal margin Junction temperature rating is -55°C to 150°C, which covers the engine-bay ambient band with margin: a 125°C board ambient at the SMC land still leaves 25°C of junction rise before the limit at rated pulse conditions. The DO-214AB (SMC) package with its exposed cathode pad on the bottom metalises heat to the PCB — thermal pad area drives the real-world clamping performance under repeated transients. A single 2:1 derating on copper pad area typically halves the thermal resistance versus a minimum-land layout. ## Bidirectional polarity and circuit-level fit Single bidirectional channel means it clamps both positive and negative transients — the polarity is not selectable at the board level. For a 12 V automotive rail the standoff sits comfortably above the nominal bus voltage with headroom for the transient overshoot before the clamp engages, which is the correct condition for a TVS protecting an ECU power input. Power Line Protection is listed as No — this part is designed for signal or load-side protection, not for deployment on the primary power bus as a branch protection element.","metaTitle":"1.5SMC9.1CAHR7G Zener TVS Diode, 1500W","metaDescription":"Taiwan Semiconductor 1.5SMC9.1CAHR7G — bidirectional Zener TVS in DO-214AB, AEC-Q101, 7.78V standoff, 13.4V clamping, 117A peak pulse. Active. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Taiwan Semiconductor Corporation","Type":"Zener","Grade":"Automotive","Series":"1.5SMC","Package":"Tape & Reel (TR)","Applications":"-","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC9.1","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMC)","Voltage - Breakdown (Min)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"117A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1CAHR7G/alternatives.json"},"ai":{"faq":[{"question":"What does AEC-Q101 qualification mean for this Zener TVS?","answer":"AEC-Q101 is the automotive discrete semiconductor stress qualification — it certifies the part passed temperature cycling, HTRB (high-temperature reverse bias), and moisture-resistance sequences that commercial TVS parts do not. It is the minimum grade required for ECU power-input protection in most OEM designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC9.1CAHR7G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/taiwan-semiconductor-corporation/1.5SMC9.1CAHR7G 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}}