{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE56","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE56","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE56","factsUrl":"https://icboms.com/api/mcp/products/1.5KE56","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE56, 1500W peak pulse power, 47.8V reverse standoff, DO-201AA axial-lead package, Tape & Reel.","salesMarkdown":"## 1500 W peak pulse — the clamping event that matters The 1.5KE56: That power rating is the device's energy-handling ceiling for a single transient — it tells you how much surge the junction can absorb before failure, not the continuous dissipation. ## Clamp voltage and the protection threshold Reverse standoff voltage is 47.8 V — the DC or peak-AC voltage the line can carry without the diode conducting appreciable leakage. Breakdown occurs at 50.4 V minimum, and the clamping voltage at peak pulse current (19.7 A) is 80.85 V maximum. The gap between standoff and clamp defines the protection window: a 48 V rail sees the diode start to avalanche just above normal operation and hold the transient below 81 V. The DO-201AA axial-lead package (also known as DO-27) is a through-hole footprint that handles the thermal pulse of a 1500 W surge without requiring a heatsink — the lead frame and solder joint are the thermal path. ## Obsolete — sourcing through independent channels Littelfuse lists the 1.5KE56 as obsolete. Sourcing is through independent distribution — quantities are lot-specific, and availability is confirmed at the time of RFQ.","metaTitle":"1.5KE56 Littelfuse TVS Diode, 1500W, 47.8V Standoff","metaDescription":"Littelfuse 1.5KE56 Zener TVS diode, 1500W peak pulse power, 47.8V reverse standoff, 80.85V clamping.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"50.4V","Voltage - Clamping (Max) @ Ipp":"80.85V","Voltage - Reverse Standoff (Typ)":"47.8V","Current - Peak Pulse (10/1000µs)":"19.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6835","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE56","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE56 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}