{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE300C","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE300C","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE300C","factsUrl":"https://icboms.com/api/mcp/products/1.5KE300C","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE Series bidirectional Zener TVS diode, 1.5KE300C, 1500W peak pulse power, 434.7V clamping, DO-201AA axial through-hole package.","salesMarkdown":"The 1.5KE300C: Its 434.7 V clamping voltage (max at Ipp) defines the protection ceiling — a transient exceeding this level is clipped, but the energy must stay within the pulse-power rating or the junction fails. Housed in a DO-201AA (DO-27) axial-lead through-hole package, it mounts into plated through-holes on the PCB — the lead bends absorb mechanical strain during wave-solder assembly, and the body stands off the board for convection cooling. The 256 V reverse standoff voltage means the diode is effectively open at normal rail voltage up to that level, only conducting during a transient event. ## Clamping voltage and pulse current — what the ratings mean for the protection design For a 256 V rail, the TVS triggers at the breakdown voltage (270 V min) and clamps at 434.7 V — the downstream components must withstand this peak for the pulse duration. The 1500 W rating is derated at elevated ambient temperatures per the manufacturer's pulse-derating curve — above 25°C the peak power must be reduced proportionally. ## Obsolete — sourcing through independent distribution The 1.5KE300C is listed as Obsolete by Littelfuse. For a BOM line already qualified to this TVS, the existing footprint and electrical performance are locked — the 1.5KE series shares the same DO-201 package across voltage variants, so a replacement from the same family (e.g., a different voltage clamp) would require a re-spin of the protection design. No pin-compatible second source from another manufacturer is recorded for this exact order code.","metaTitle":"Littelfuse 1.5KE300C TVS Diode, 1500W, 434.7V Clamp","metaDescription":"Littelfuse 1.5KE300C bidirectional Zener TVS diode, 1500W peak pulse power, 434.7V 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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"270V","Voltage - Clamping (Max) @ Ipp":"434.7V","Voltage - Reverse Standoff (Typ)":"256V","Current - Peak Pulse (10/1000µs)":"3.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3688","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the 1.5KE300C or check availability?","answer":"The 1.5KE300C is obsolete but available through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE300C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE300C 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}}