{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91CA R7G","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5SMC91CA-R7G","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC91CA-R7G","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA%20R7G","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor Corporation, 1.5SMC series, bidirectional Zener TVS diode, 77.8 V reverse standoff typ, 125 V clamping max @ 12.6 A peak pulse, 1500 W peak pulse power, DO-214AB SMC surface-mount package.","salesMarkdown":"## Clamping voltage and protection margin The 1.5SMC91CA R7G: The reverse standoff of 77.8 V marks the working voltage the TVS sees in normal operation — it sits dormant and draws only leakage current below that level. That 125 V ceiling is what the downstream circuit must survive — it defines the protection margin, not the standoff number. The 1.5SMC series carries a 1500 W peak pulse rating at the standard 10/1000 µs surge shape — this is the industry-common waveform for AC-line and DC-rail transient simulation, so the rating is directly comparable across competing TVS families in the same package. ## DO-214AB SMC package and board integration The DO-214AB (SMC) is the standard SMC footprint for unidirectional and bidirectional TVS diodes — the same land pattern used across Vishay, Littelfuse, and ON Semiconductor 1.5SMC-pin-compatible parts. For layout, the cathode bar on the package marking identifies the TVS polarity; on the bidirectional CA variant the orientation still matters for the polarity-marked pin in relation to the circuit node being protected. At full surge repetition the clamping energy budget drives the junction temperature delta; the datasheet thermal resistance figure sets the board-area design rule. ## Sourcing posture and lifecycle The 1.5SMC family is broadly supported across multiple manufacturers in the same SMC package, so a second-source qualification is viable if single-source risk is a concern.","metaTitle":"1.5SMC91CA R7G TVS Diode, 77.8V Standoff, DO-214AB","metaDescription":"Bidirectional Zener TVS, 1500W peak pulse, 77.8V standoff / 125V clamp, DO-214AB SMC package. Active production, 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","Series":"1.5SMC","Package":"Tape & Reel (TR)","Applications":"General Purpose","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":"-55°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)":"12.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA%20R7G/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between unidirectional and bidirectional TVS diodes in the 1.5SMC series?","answer":"The CA suffix designates the bidirectional variant — it clamps both polarities of transient voltage, making it suitable for AC lines or floating signal paths. A non-CA 1.5SMC91 part is unidirectional and clamps only one polarity."},{"question":"What is the closest alternative to 1.5SMC91CA in this family?","answer":"The base product number 1.5SMC91 identifies the voltage class — alternatives within the 1.5SMC family share the same DO-214AB footprint, but pinout and exact clamping characteristics vary by manufacturer. Confirm the standoff and clamping specs against the alternative datasheet before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC91CA-R7G","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/1.5SMC91CA-R7G 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}}