{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE550A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE550A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE550A","factsUrl":"https://icboms.com/api/mcp/products/1.5KE550A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 1.5KE series Zener TVS diode, 1.5KE550A, 1500W peak pulse power, 468V reverse standoff, 760V clamping, DO-201AA axial through-hole package.","salesMarkdown":"## Active production — BOM-fit for 468 V rails The 1.5KE550A: Its 468 V reverse standoff voltage (typ) makes it a fit for protecting 400 VAC nominal DC bus or 480 VAC rectified rails where the steady-state voltage stays below that threshold. The device clamps at 760 V max at 2 A peak pulse current, and breakdown starts at a minimum of 522.5 V. That clamping margin above the standoff gives the protected circuit headroom during transients without nuisance triggering on normal line ripple. ## Package and thermal envelope Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE550A is a through-hole part — it fits standard 0.100-inch pitch board layouts and can be hand-soldered or wave-soldered. The supplier device package is DO-201. Operating junction temperature range spans -55°C to 175°C, covering industrial and telecom environments where ambient heat plus self-heating from repeated surges must stay within the die's thermal budget. ## Single-channel unidirectional clamping The 1.5KE550A is a single unidirectional channel — one diode per package, cathode band marked. For bidirectional clamping on AC lines, two devices back-to-back or a dedicated bidirectional variant from the same 1.5KE family would be needed. Peak pulse current capability is 2 A under the 10/1000 µs test waveform, which is the standard TVS rating condition. ## Sourcing posture for the 1.5KE550A The base product number is 1.5KE, so the full reel marking and ordering suffix follow the Littelfuse 1.5KE series convention.","metaTitle":"1.5KE550A Littelfuse TVS Diode, 468V Standoff, DO-201","metaDescription":"1.5KE550A Littelfuse Zener TVS, 1500W peak pulse, 468V reverse standoff, 760V clamping. Active lifecycle, through-hole DO-201. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","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)":"522.5V","Voltage - Clamping (Max) @ Ipp":"760V","Voltage - Reverse Standoff (Typ)":"468V","Current - Peak Pulse (10/1000µs)":"2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/149eca2cbf10498ecc0c7eab912fe9f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for 1.5KE550A?","answer":"Sourced to order against your BOM quantity through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE550A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE550A 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}}