{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE540A","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE540A","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE540A","factsUrl":"https://icboms.com/api/mcp/products/1.5KE540A","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE Series Zener TVS Diode, 1.5KE540A, 1500W Peak Pulse, 460V Reverse Standoff, 740V Clamp, DO-201AA Axial, Through Hole.","salesMarkdown":"The 1.5KE540A: The 460 V reverse standoff voltage is the maximum continuous DC voltage the part can block without conducting — it sits on a 460 V rail and stays invisible until a surge pushes the line above the 513 V minimum breakdown threshold. When that happens, the diode clamps the transient to 740 V maximum, shunting up to 2 A of peak pulse current (10/1000 µs waveform) away from the protected circuit. The 1500 W peak-pulse rating is the power the device can absorb in a single 10/1000 µs surge — enough for industrial power-supply transients, motor-drive reflections, or lightning-induced spikes on a 460 V bus. ## Package, mounting, and board-fit reality Housed in a DO-201AA axial-lead package, the 1.5KE540A is a through-hole part — the leads are soldered into plated through-holes on the PCB. The DO-201 footprint is standard for TVS diodes in this power class; the axial body allows the device to be mounted standing upright or laid flat, depending on the board clearance. The supplier device package is DO-201, which is the same mechanical outline as the industry-standard 1.5KE series. It is a unidirectional Zener TVS — one channel, polarity matters. The cathode band on the body must face the protected rail; the anode connects to ground. Reversing it turns the diode into a forward-biased rectifier and the protection disappears. Power line protection is not supported — this part is for DC signal or power rails, not AC mains.","metaTitle":"Littelfuse 1.5KE540A TVS Diode, 460V Standoff, 740V Clamp","metaDescription":"Littelfuse 1.5KE540A Zener TVS diode, 1500W peak pulse, 460V standoff, 740V clamp. Active production, DO-201 package. Request a 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)":"513V","Voltage - Clamping (Max) @ Ipp":"740V","Voltage - Reverse Standoff (Typ)":"460V","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":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE540A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE540A 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}}