{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC91","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC91","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMC Zener TVS diode, 1500W peak pulse, 77.8V reverse standoff, 131.25V clamping @ 12.2A, DO-214AB SMC package, surface mount, -55°C to 150°C junction.","salesMarkdown":"## What the 1.5SMC91 is and what the ratings mean At that pulse width the part absorbs the surge energy and clamps the line before the downstream load sees the overvoltage spike. Reverse standoff of 77.8V sets the continuous working voltage below which the TVS conducts no current. The gap between standoff and clamping voltage is the protection margin — the downstream IC must survive 131.25V for the duration of the event. ## Where Zener TVS diodes of this class are used General-purpose Zener TVS devices protect low-speed signal lines, power rails, and secondary suppression points where the 77.8V standoff fits the rail nominal. The 1.5SMC series is the mid-range peak-pulse class — above the 400W 1.5KE family and below the 3kW 5SMC devices — positioned for board-level protection on industrial and instrumentation panels. ## Package, mounting, and sourcing reality Surface-mount DO-214AB (SMCJ) package on tape-and-reel — compatible with standard SMT assembly lines. Available through independent distribution for existing designs; BOM quantities are quoted to order against an RFQ.","metaTitle":"Littelfuse 1.5SMC91 Zener TVS Diode, DO-214AB, 1500W","metaDescription":"Littelfuse 1.5SMC91 Zener TVS diode, 1500W peak pulse, 77.8V standoff, 131.25V clamping.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5SMC","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"81.9V","Voltage - Clamping (Max) @ Ipp":"131.25V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/118f1b70ec0f0941665a20e5472af60a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91/alternatives.json"},"ai":{"faq":[{"question":"What clamping voltage should I expect from the 1.5SMC91?","answer":"The reverse standoff (working voltage) is 77.8V typical, with breakdown beginning at 81.9V minimum."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC91","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC91 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T21:03:02.766Z","lastPublished":"2026-07-21T21:03:02.766Z","indexable":true}}