{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC51","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMC51","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMC51","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC51","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5SMC series Zener TVS diode, 1.5SMC51, 1500W peak pulse power, 43.6V reverse standoff, 73.61V clamp, DO-214AB SMC surface mount package.","salesMarkdown":"The Littelfuse 1.5SMC51 is a Zener-type transient voltage suppressor (TVS) diode from the 1.5SMC series, designed for general-purpose circuit protection against voltage transients. These ratings define the protection envelope: the circuit rail must stay below 43.6V during normal operation, and the TVS clamps transients to 73.61V, preventing downstream components from seeing overvoltage. The DO-214AB (SMC) package supports standard surface-mount reflow assembly and is also known as the SMCJ footprint. ## Lifecycle reality — obsolete, sourced per RFQ Littelfuse lists the 1.5SMC51 as Obsolete. This means the manufacturer has discontinued production and no longer accepts new orders. For BOM lines that require this exact order code, sourcing runs through independent distribution channels. Availability is lot-specific and confirmed at quote time against the RFQ quantity. No stock-holding claim is made; each request is sourced on demand.","metaTitle":"1.5SMC51 Littelfuse TVS Diode, 1500W, DO-214AB","metaDescription":"Littelfuse 1.5SMC51 Zener TVS diode, 1500W peak pulse power, 43.6V standoff, 73.61V clamp. Obsolete — sourced to order against RFQ. DO-214AB SMC package.","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)":"45.95V","Voltage - Clamping (Max) @ Ipp":"73.61V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"21.7A"}},"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/1.5SMC51/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 1.5SMC51 or check availability?","answer":"The 1.5SMC51 is obsolete and sourced through independent distribution."},{"question":"What is the closest pin-compatible alternative to the 1.5SMC51?","answer":"A functional replacement would require reviewing the circuit's standoff voltage, breakdown, and clamping requirements against other 1500W TVS diodes in the DO-214AB package — confirm the electrical specs before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMC51","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMC51 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T09:16:26.529Z","lastPublished":"2026-07-21T09:16:26.529Z","indexable":true}}