{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC9.1","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC9.1","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMC Zener TVS diode, 1.5 kW peak pulse, 7.78V reverse standoff, 14.07V clamping, 113.4A peak pulse, DO-214AB (SMC), surface mount, -55°C to 150°C junction.","salesMarkdown":"## What the obsolete status means for your BOM The 1.5SMC9.1: If the design is still in the field, the path forward is independent distribution: quantities are lot-specific, traceability is confirmed at quote, and a cross-reference search across the 1.5SMC family is the only way to surface a form-fit-function replacement. For a new design, this part is off the table; the 1.5SMC series itself may have newer TVS ratings in the same SMC package — the parametric family cross-reference is worth running before committing to any alternate. ## The standoff-clamp spec set and what it means for protection The 1.5SMC9.1 is a unidirectional TVS Zener in the DO-214AB (SMC) package — it protects a single polarity against transients by clamping. The reverse standoff voltage of 7.78 V is the working bias the TVS sees in normal operation; any spike that drives the line above that forward-conducts through the Zener action. That 14.07 V clamping ceiling is the number that protects whatever is behind it — the downstream IC sees 14.07 V as the stress limit, not the raw transient amplitude. ## 1500 W peak pulse and the junction temperature envelope Rated for 1500 W peak pulse (1.5 kW) with a junction temperature ceiling of 150°C, the part survives the 10/1000 µs surge profile common in industrial and telecom supply rails. The SMC package thermal resistance to the board pads governs whether the part cycles reliably in your enclosure — at 113.4 A through the clamping voltage the instantaneous dissipation is over 1.5 kW, so the board copper under the cathode tab is the primary heatsink. Surface-mount TVS in this power class is typically reflow-soldered; the 1.5SMC series ships on tape and reel for automated placement.","metaTitle":"Littelfuse 1.5SMC9.1 TVS Zener, 7.78V standoff, DO-214AB","metaDescription":"1.5SMC9.1 is obsolete — unidirectional TVS Zener, 1500W peak pulse, 7.78V standoff / 14.07V clamping, DO-214AB SMC package. Sourced to order via RFQ.","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)":"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":"$0.6200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/118f1b70ec0f0941665a20e5472af60a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC9.1/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 1.5SMC9.1 if I need a form-fit-function substitute?","answer":"No official cross-reference or successor appears in this ledger. The 1.5SMC series spans multiple standoff voltage ratings in the same DO-214AB SMC package — the closest parametric match in the family is the part with the same nominal standoff and clamping ceiling for your supply rail. Confirm the BOM line voltage, pick the next higher standoff rating in the series, and verify the clamping ceiling against the downstream IC abs-max before committing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC9.1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC9.1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T21:03:30.476Z","lastPublished":"2026-07-21T21:03:30.476Z","indexable":true}}