{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1C","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC9.1C","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1C","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1C","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMC9.1C unidirectional TVS diode, DO-214AB SMC package, surface mount, 7.78V standoff, 8.17V breakdown, 14.07V clamping @ 113.4A, 1500W peak pulse, -55°C to 150°C TJ, tape & reel.","salesMarkdown":"## What the voltage hierarchy means The 1.5SMC9.1C: The reverse standoff voltage of 7.78V is the working DC rail the protected node normally sees; the minimum breakdown of 8.17V is where the device begins conducting; and the clamping voltage of 14.07V at 113.4A peak pulse is the maximum the downstream circuit experiences during a surge event. For a 5V or 12V rail, the 7.78V standoff gives comfortable headroom above the nominal rail while keeping the clamping level well within the withstand rating of most downstream ICs. A faster waveform like 8/20µs delivers the same energy in less time, which can push the clamping voltage higher; the datasheet peak pulse power curve shows the derating behaviour across different pulse shapes. ## Temperature and package fit The junction temperature rating of -55°C to 150°C places this part in the industrial and automotive temperature band — the upper limit is set by the junction, not the ambient, so the thermal resistance from junction to ambient (θJA) in the actual board layout determines how much margin remains at high ambient temperatures. The unidirectional polarity means it protects a positive-going transient relative to ground — it does not clamp negative transients, only the reverse polarity absolute maximum. For bidirectional protection or AC-line work, a bidirectional TVS or a pair of unidirectional devices back-to-back is required. ## Sourcing status and lifecycle For an existing board design the part is supported through independent distribution channels; a board spin to a current-series alternative is the recommended path for new designs. Confirm the exact alternative through Littelfuse parametric search or an FAE discussion — the 1.5SMC series covers a wide standoff voltage range, and a near-equivalent with an active status may share the same footprint and clamping behaviour.","metaTitle":"Littelfuse 1.5SMC9.1C TVS Diode, 7.78V Standoff, 1500W","metaDescription":"Littelfuse 1.5SMC9.1C unidirectional TVS diode, DO-214AB SMC package, 7.78V standoff, 8.17V breakdown, 14.07V clamping at 113.4A, 1500W peak pulse.","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","Voltage - Breakdown (Min)":"8.17V","Voltage - Clamping (Max) @ Ipp":"14.07V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"113.4A"}},"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/1.5SMC9.1C/alternatives.json"},"ai":{"faq":[{"question":"Who supplies the 1.5SMC9.1C and how is it quoted?","answer":"No authorized-stocked channel claim applies — the sourcing posture is quoted-to-order, not warehouse-held."},{"question":"What is the 1.5SMC9.1C's type and series?","answer":"The part is a Zener-type unidirectional TVS (transient voltage suppressor) in the 1.5SMC series. It mounts surface mount in the DO-214AB (SMCJ) package and is packaged tape and reel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC9.1C when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T21:15:32.949Z","lastPublished":"2026-07-21T21:15:32.949Z","indexable":true}}