{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91CA V7G","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5SMC91CA-V7G","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC91CA-V7G","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA%20V7G","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor Corporation 1.5SMC91CA V7G Zener TVS diode, 77.8V reverse standoff, 86.5V min breakdown, 125V clamping, 12.6A peak pulse, 1500W, DO-214AB SMC, surface mount, Tape & Reel.","salesMarkdown":"## What 1500W peak pulse means for a telecom line card The 1.5SMC91CA V7G is a unidirectional TVS diode — the type you route across a signal pair or power rail to clamp transients before they reach downstream silicon. Rated 1500 W peak pulse at a 10/1000 µs wave shape, it survives the slow-front surge events typical of telecom infrastructure: lightning-induction on long cable runs, relay bounce on DC power feed, and load dumps at the power entry point. The clamping voltage ceiling of 125 V at the rated peak current of 12.6 A means the protected node never sees more than that — the downstream circuit sees a defined stress floor regardless of surge amplitude up to the 1.5 kW rating. ## Standoff, breakdown, clamping — the voltage hierarchy Reverse standoff is the working voltage: 77.8 V typical means the TVS sits idle and draws only leakage current while the line runs at normal operating voltage. The 125 V maximum clamping voltage is the ceiling the downstream circuit sees at 12.6 A — a telecom line card running 48 V nominal has roughly 30 V of headroom to the standoff rating, which is the standard derating margin for telecom protection designs. ## 150°C junction temperature and the telecom enclosure context Junction temperature rating is 150 °C (TJ). Telecom outdoor cabinets in summer sun can push ambient well above 85 °C inside the enclosure; the thermal resistance of the SMC body to the board pad determines whether the junction stays within margin at the peak pulse current. The -55 °C low end covers outdoor cabinet cold-start and remote terminal equipment at altitude. The single bidirectional channel covers a two-wire balanced pair with one device — no need for a dual-array when the protected port is single-ended. ## Active production — what that means for sourcing Available through independent distribution against an RFQ; quantity, pricing, and lead time confirmed at quote time. No official successor or cross-reference is listed for this base number.","metaTitle":"1.5SMC91CA V7G TVS Diode, 77.8V Standoff, 125V Clamping","metaDescription":"1.5SMC91CA V7G unidirectional TVS diode, 77.8V standoff, 1500W peak pulse, DO-214AB SMC surface mount. 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":"Telecom","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":"$0.2184","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91CA%20V7G/alternatives.json"},"ai":{"faq":[{"question":"What TVS voltage rating do I need for a 48 V telecom rail?","answer":"A 48 V nominal line needs a standoff above 48 V with margin to the breakdown threshold. The 77.8 V standoff on this part gives roughly 30 V of headroom above 48 V — that is the standard telecom derating target. The 86.5 V minimum breakdown is the clamping onset; the 125 V clamping ceiling is what the downstream circuit sees at full surge current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5SMC91CA-V7G","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-V7G 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}}