{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE350-B","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE350-B","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE350-B","factsUrl":"https://icboms.com/api/mcp/products/1.5KE350-B","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE350-B, 300V reverse standoff, 1500W peak pulse power, DO-201AA axial, bulk.","salesMarkdown":"The 1.5KE350-B: With a 300 V reverse standoff voltage and a clamping ceiling of 506.1 V at 3.2 A peak pulse current, it protects 300 VDC rails from transient overvoltage events — the clamping voltage is the hard limit the downstream silicon sees. The operating junction temperature range spans -55°C to 175°C, covering industrial and telecom ambient conditions without derating at the high end. The DO-201AA axial-lead package (also known as DO-27) mounts through-hole — the lead length and board copper area set the thermal impedance for repetitive pulse trains, not just single-shot events. ## Obsolete — sourcing through independent channels Littelfuse lists the 1.5KE350-B as obsolete. The 1.5KE series is a broad TVS family with many voltage variants sharing the same 1500 W power class and DO-201 footprint. A pin-compatible replacement within the same series requires matching the standoff voltage (300 V) and unidirectional polarity — the 1.5KE350A (bidirectional) would not be a drop-in for this unidirectional part.","metaTitle":"Littelfuse 1.5KE350-B TVS Diode, 300V Standoff, 1500W","metaDescription":"Littelfuse 1.5KE350-B Zener TVS diode, 300V standoff, 1500W peak pulse power, DO-201 package. Obsolete — sourced to order against RFQ.","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":"Bulk","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)":"315V","Voltage - Clamping (Max) @ Ipp":"506.1V","Voltage - Reverse Standoff (Typ)":"300V","Current - Peak Pulse (10/1000µs)":"3.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE350-B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE350-B 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}}