{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMB51A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMB51A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMB51A","factsUrl":"https://icboms.com/api/mcp/products/1.5SMB51A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5SMB Series Zener TVS Diode, 1.5SMB51A, 1500W Peak Pulse, DO-214AA SMB, Tape & Reel, Unidirectional, 43.6V Standoff, 70.1V Clamp.","salesMarkdown":"## 1500 W peak pulse in a DO-214AA footprint The 1.5SMB51A: The 70.1 V clamping voltage at 21.7 A peak pulse current means this part clamps transients well below the typical 60 V bus rating of downstream DC-DC converters in telecom line cards. ## Breakdown and standoff — the protection window Reverse standoff voltage is 43.6 V, meaning the diode stays off below that level and does not leak onto the protected rail. Minimum breakdown voltage is 48.5 V, so the avalanche triggers reliably before the rail sees a transient above that threshold. The 1500 W peak pulse rating at 10/1000 µs gives a solid margin for secondary lightning surge protection in telecom equipment, where the GR-1089 intra-building surge typically peaks around 500 W per port. ## Surface-mount storage and handling Operating temperature range -65°C to 150°C junction covers telecom outdoor cabinets and central-office environments.","metaTitle":"Littelfuse 1.5SMB51A TVS Diode, 1500W, DO-214AA","metaDescription":"Littelfuse 1.5SMB51A Zener TVS diode, 1500W peak pulse, 70.1V clamp, DO-214AA SMB. Active production. Quoted to order.","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)","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)":"48.5V","Voltage - Clamping (Max) @ Ipp":"70.1V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"21.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2415","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/1.5SMB51A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMB51A 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}}