{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMB56CA","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5SMB56CA","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5SMB56CA","factsUrl":"https://icboms.com/api/mcp/products/1.5SMB56CA","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5SMB Series bidirectional TVS diode, 1.5SMB56CA, 1500W peak pulse power, 47.8V reverse standoff, 99.5V clamping, DO-214AA (SMB) package, surface mount.","salesMarkdown":"## What the clamping voltage means for your 48V bus The 1.5SMB56CA: The 47.8V reverse standoff voltage means it sits across a nominal 48V telecom bus without conducting in normal operation — the device only starts avalanching when the line exceeds 53.2V (minimum breakdown). When the transient hits, the diode clamps at 99.5V maximum while shunting 108.4A peak pulse current. For a 48V DC-powered base station or router card, this clamp voltage is the ceiling the downstream DC-DC converter's input MOSFETs must survive — if the converter's abs-max rating is below 100V, this part provides adequate protection margin. ## Package and board-fit for the DO-214AA footprint Housed in the DO-214AA (SMB) package, the 1.5SMB56CA is a surface-mount device with a standard JEDEC footprint. The cathode band is marked for polarity identification, though as a bidirectional part either orientation works in the circuit. The operating junction temperature range spans -65°C to 150°C, covering telecom outdoor cabinets and industrial enclosures where ambient temperatures can reach 85°C. The 1500W peak pulse rating is derated above 25°C per the standard thermal derating curve — at 100°C ambient, the effective peak pulse power drops to roughly 75% of the 25°C rating.","metaTitle":"Littelfuse 1.5SMB56CA TVS Diode, 1500W, Bidirectional","metaDescription":"Littelfuse 1.5SMB56CA bidirectional TVS diode, 1500W peak pulse power, 47.8V standoff, 99.5V clamp. Active production. Order via 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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AA (SMBJ)","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":"$0.6800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/81b90dfb07fef606df152b0bf1427329.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does 1.5SMB56CA come in?","answer":"The 1.5SMB56CA is supplied in the DO-214AA (SMB) surface-mount package, also referred to as SMBJ. It is a standard JEDEC footprint compatible with automated pick-and-place assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5SMB56CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5SMB56CA 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}}