{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC9.1A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5SMC9.1A unidirectional TVS/Zener, 1500W peak pulse, 113.4A surge, 13.4V clamping, 7.78V standoff, DO-214AB SMC, -55°C to 150°C.","salesMarkdown":"## 1.5SMC9.1A — unidirectional TVS in DO-214AB The 1.5SMC9.1A is a unidirectional Transient Voltage Suppressor from Littelfuse's 1.5SMC series, packaged in the DO-214AB (SMCJ) surface-mount footprint — the same land pattern used across a wide family of 1500W bidirectional and unidirectional TVS devices. The clamping voltage of 13.4V at a peak pulse current of 113.4A (10/1000µs waveform) tells you it clamps a surge hard and fast: a 1.5 kW rated part that dissipates the full pulse energy without shifting its Zener knee permanently. ## What the standoff and breakdown voltages mean for circuit protection The reverse standoff voltage of 7.78V typical is the working rail the protected circuit sees in normal operation — the TVS stays reverse-biased and leaks only microamps until a transient pushes it into avalanche. The minimum breakdown of 8.65V sits above the standoff, giving the protected line headroom before the clamp engages. When a surge arrives, the clamping voltage of 13.4V is the ceiling the downstream IC or bus sees. For a 5V or 12V rail, the 7.78V standoff means this part sits comfortably above the nominal rail with margin — it does not clamp the normal signal, only the event. The 113.4A peak pulse rating at 10/1000µs is theIEC 61000-4-5 survivable surge current for this device class. ## Military temperature grade and surface-mount integration The DO-214AB SMC package with its metal die-attach and wide pad footprint dissipates the 1.5 kW peak pulse energy into the board copper; a thermal pad under the package tied to a ground plane keeps the junction cool during repeated surges. Tape-and-reel packaging supports high-volume pick-and-place assembly lines.","metaTitle":"Littelfuse 1.5SMC9.1A TVS Diode, 13.4V Clamping","metaDescription":"Littelfuse 1.5SMC9.1A unidirectional TVS diode, 1500W peak pulse, 13.4V clamping, 7.78V standoff, DO-214AB SMC package. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5SMC","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","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)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"113.4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4a8a4359c4139865ec4feb6a6da8698b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1A/alternatives.json"},"ai":{"faq":[{"question":"What does the unidirectional TVS specification mean for my protection circuit?","answer":"Unidirectional means it clamps positive-going transients only — for bidirectional protection on AC rails or differential signal lines, a bidirectional (CA-suffix) variant is required. The 1.5SMC9.1A with its single unidirectional channel is suited for DC power rails, data lines with a DC bias, or the positive side of a symmetric protection scheme."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC9.1A 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}}