{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE51","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE51","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE51","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE51, 1500W peak pulse power, 43.6V reverse standoff, 73.61V clamp, DO-201AA axial, through-hole, tape and reel.","salesMarkdown":"## 1500 W peak pulse — what the clamp means on your rail The 1.5KE51: The reverse standoff voltage is 43.6 V — the rail it protects should sit at or below that level. Breakdown starts at 45.95 V minimum, and the clamp voltage at peak pulse current is 73.61 V max, so a 48 V bus sees the TVS clamp well before the downstream silicon's abs-max rating. Peak pulse current is 21.7 A under the same 10/1000 µs condition. The junction operates from -55 °C to 175 °C, which covers industrial and most automotive under-hood environments. ## DO-201 axial — rework-friendly package Through-hole DO-201AA (also called DO-27) axial package. The leads are easy to solder into a plated through-hole board and take hot-air rework without lifting pads — a practical choice for repair benches and low-volume builds.","metaTitle":"Littelfuse 1.5KE51 TVS Diode, 1500W, DO-201","metaDescription":"Littelfuse 1.5KE51 Zener TVS diode, 1500W peak pulse, 43.6V standoff, DO-201 axial. Obsolete — sourced to order. Request quote.","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)":"45.95V","Voltage - Clamping (Max) @ Ipp":"73.61V","Voltage - Reverse Standoff (Typ)":"43.6V","Current - Peak Pulse (10/1000µs)":"21.7A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE51?","answer":"We source the 1.5KE51 through independent distribution channels."},{"question":"What is the peak pulse power of the 1.5KE51?","answer":"1500 W (1.5 kW) under a 10/1000 µs waveform. The clamp voltage at that peak current is 73.61 V max."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE51","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE51 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}}