{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMB56A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMB56A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMB56A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMB56A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMB series Zener TVS diode, 1.5SMB56A, 1500W peak pulse power, 47.8V reverse standoff, 53.2V breakdown, 99.5V clamp, DO-214AA SMB package, surface mount.","salesMarkdown":"## 1500W peak pulse power in a DO-214AA SMB package The Littelfuse 1.5SMB56A is a Zener-type TVS diode from the 1.5SMB series, rated for 1500W (1.5kW) peak pulse power at the standard 10/1000µs waveform. This power rating means it can clamp a 108.4A transient pulse (8/20µs waveform) down to 99.5V, protecting downstream telecom circuits from lightning-induced surges and inductive load dumps. The reverse standoff voltage is 47.8V, with a minimum breakdown of 53.2V — the protection window starts conducting at 53.2V and clamps hard at 99.5V. For a 48V telecom bus, this leaves enough margin above the nominal rail to avoid nuisance triggering during normal ripple, while still catching overvoltages before they reach the line card. ## Temperature range and package fit Operating junction temperature spans -65°C to 150°C, covering the full industrial and telecom outdoor enclosure range. The tape-and-reel packaging (TR) suits automated pick-and-place; cut-tape (CT) is available for prototype or low-volume builds.","metaTitle":"1.5SMB56A Littelfuse TVS Diode, 1500W, DO-214AA","metaDescription":"Littelfuse 1.5SMB56A Zener TVS diode, 1500W peak pulse power, 47.8V standoff, DO-214AA SMB package. Active production, 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":"1.5SMB","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Telecom","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMB","Operating Temperature":"-65°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AA (SMBJ)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"53.2V","Voltage - Clamping (Max) @ Ipp":"99.5V","Voltage - Reverse Standoff (Typ)":"47.8V","Current - Peak Pulse (10/1000µs)":"108.4A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/81b90dfb07fef606df152b0bf1427329.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMB56A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMB56A 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}}