{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91ARL4","brand":"onsemi","brandSlug":"onsemi","productSlug":"1.5KE91ARL4","canonicalUrl":"https://icboms.com/onsemi/1.5KE91ARL4","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91ARL4","rawCanonicalId":null},"summary":{"shortDescription":"onsemi Mosorb™ Zener TVS, 1.5KE91ARL4, 1500W peak pulse power, 86.5V breakdown min, 77.8V reverse standoff, DO-201AD axial, Tape & Reel.","salesMarkdown":"## Zener TVS with 1500W pulse rating The 1.5KE91ARL4 is an onsemi Mosorb™ Zener transient-voltage-suppression diode rated for 1500W peak pulse power (10/1000 µs waveform). The 86.5V minimum breakdown voltage and 77.8V reverse standoff define the clamping threshold for a 77.8 VDC rail — the TVS stays off below that line and clamps transients to 125V max at 12A peak pulse current. ## Obsolete — plan replacement or last-time buy onsemi lists the 1.5KE91ARL4 as Obsolete. For a BOM line that still needs this 77.8V standoff, 1500W rating in DO-201AD axial, the procurement path is either a last-time-buy from remaining distributor stock or a cross to a current-production TVS with matching peak pulse power and breakdown voltage. ## DO-201AD axial package and temp range Through-hole DO-201AD axial package, rated for -65°C to 175°C junction temperature. No power-line protection feature — this is a unidirectional Zener TVS for general-purpose transient suppression on DC rails. The 1500W rating is derated above 25°C per the datasheet curve; at 175°C junction the pulse power capability drops significantly.","metaTitle":"1.5KE91ARL4 onsemi Zener TVS 1500W DO-201AD Obsolete","metaDescription":"onsemi 1.5KE91ARL4 Mosorb™ Zener TVS, 1500W peak pulse, 86.5V breakdown, DO-201AD axial. Obsolete — confirm replacement or last-time buy. RFQ for sourcing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"onsemi","Type":"Zener","Series":"Mosorb™","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-65°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"Axial","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/717ad1fc0ab391931f54c66e75e89e87.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for 1.5KE91ARL4?","answer":"onsemi does not publish a direct successor for the 1.5KE91ARL4. A cross to a current-production 1500W Zener TVS with a 77.8V reverse standoff and 86.5V breakdown in DO-201AD is needed. The 1.5KE91A (without the RL4 suffix) is the same die in a different packaging option — confirm Tape & Reel vs bulk before substituting."},{"question":"1.5KE91ARL4 vs 1.5KE91A - what's the difference?","answer":"Both share the same 1.5KE91A Zener die with 86.5V breakdown and 1500W rating. The RL4 suffix indicates Tape & Reel packaging; the base 1.5KE91A may be supplied in bulk or other packaging. Electrical characteristics are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/1.5KE91ARL4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/1.5KE91ARL4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:13:19.594Z","lastPublished":"2026-07-17T20:13:19.594Z","indexable":true}}