{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91CA","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE91CA","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE91CA","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91CA","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series TVS diode, Type Zener, 1.5KE91CA, Bidirectional, 1500W peak pulse, 77.8V reverse standoff, DO-201AA axial leaded.","salesMarkdown":"## What the 1500W peak pulse rating means for your BOM The 1.5KE91CA: The 125 V clamping voltage at 12.2 A peak pulse current (10/1000 µs waveform) means a 77.8 V supply bus — common in 48 V telecom or 72 V industrial systems — gets clamped before the downstream DC-DC converter's input rating is exceeded. The 1500 W rating is the peak pulse power dissipation for an 8/20 µs or 10/1000 µs surge — the actual energy the part absorbs depends on the pulse duration. Housed in a DO-201AA (DO-27) axial-leaded package, the 1.5KE91CA is a through-hole part suited for point-to-point wiring or PCB mounting where the lead bend radius and hole diameter match the DO-201 footprint. The bidirectional construction means a single device protects both polarities — no need for two diodes back-to-back on a bipolar line. The junction temperature limit of 175°C allows the device to absorb repeated surges in a 85°C ambient enclosure without derating the peak power below the 1500 W mark. ## Active production — no lifecycle surprises For a BOM that already qualified the DO-201 footprint, the active lifecycle means no board spin is required for the foreseeable future.","metaTitle":"1.5KE91CA Littelfuse TVS Diode, 1500W, 77.8V Standoff","metaDescription":"Littelfuse 1.5KE91CA bidirectional TVS, 1500W peak pulse, 77.8V standoff, 125V 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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7081","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order 1.5KE91CA or request a quote?","answer":"The 1.5KE91CA is sourced to order against your BOM quantity through independent and authorized distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE91CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE91CA 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}}