{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE22ARL","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"1.5KE22ARL","canonicalUrl":"https://icboms.com/stmicroelectronics/1.5KE22ARL","factsUrl":"https://icboms.com/api/mcp/products/1.5KE22ARL","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics 1.5KE22ARL, Zener, 1.5KE/TRANSIL series, 1500W peak pulse, 18.8V standoff, 20.9V breakdown, 39.3V clamp, 1 unidirectional channel, DO-201AA/DO-27 axial, through hole.","salesMarkdown":"The STMicroelectronics 1.5KE22ARL is a Zener-based transient voltage suppressor in the 1.5KE / TRANSIL series. It is a unidirectional device rated for 1500 W peak pulse power (10/1000 µs waveform), with a reverse standoff voltage of 18.8 V, a minimum breakdown voltage of 20.9 V, and a maximum clamping voltage of 39.3 V at the peak pulse current of 254 A (8/20 µs). The 1500 W rating is the headline number for surge protection — it tells you the device can absorb a single 1 ms surge up to that power without failing. For a 24 V bus or a 18 V rail with a bit of margin, the 18.8 V standoff keeps the part out of conduction during normal operation, while the 20.9 V breakdown guarantees it starts clamping before the downstream circuitry sees damaging overvoltage. The 39.3 V clamp is the worst-case voltage the load sees during a surge — that figure drives the voltage rating of the protected components. If your downstream silicon is rated for 40 V absolute maximum, this part leaves only 0.7 V of headroom, which is thin. For a 30 V-rated rail, it is comfortable. ## Through-hole axial package — board-level fit The 1.5KE22ARL comes in a DO-201AA / DO-27 axial-lead package, through-hole mount. That means it is hand-solderable and rework-friendly, but it takes up board area on both sides — the body sits above the board and the leads go through to the opposite side. For high-reliability or field-repairable assemblies, that is an advantage; for dense SMT boards, it is a compromise. The device is unidirectional, so it protects one polarity only. If your application needs bidirectional clamping (e.g., AC signal lines), you would need two devices back-to-back or a different part number. Capacitance is 3700 pF at 1 MHz — typical for a 1500 W TVS in this voltage class. That is high enough to distort high-speed data lines above a few MHz, so this part is best suited for power-supply rails, relay coils, or low-frequency I/O, not for Ethernet or USB. The 1.5KE series is broad, and a pin-compatible drop-in replacement would need to match the 18.8 V standoff, 20.9 V breakdown, 39.3 V clamp, and 1500 W rating in the same DO-201 package. Parts like the 1.5KE22A (without the 'RL' suffix) or the 1.5KE22CA (bidirectional) are in the same family but differ in packaging or polarity — verify the exact voltage and package before substituting. The smart move is to qualify a second-source TVS with identical electrical specs and the same DO-201 footprint, then use the 1.5KE22ARL for bridge-buy or repair stock only.","metaTitle":"STMicroelectronics 1.5KE22ARL Zener TVS, 1500W, DO-201","metaDescription":"STMicroelectronics 1.5KE22ARL Zener TVS diode in the 1.5KE/TRANSIL series. 1500W peak pulse power, 18.8V standoff, 20.9V breakdown, 39.3V clamp.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"1.5KE, TRANSIL™","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-","Power Line Protection":"No","Capacitance @ Frequency":"3700pF @ 1MHz","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"20.9V","Voltage - Clamping (Max) @ Ipp":"39.3V","Voltage - Reverse Standoff (Typ)":"18.8V","Current - Peak Pulse (10/1000µs)":"254A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/572f99690aeb2b0f302ed9cdcfd976ec.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE22ARL/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for 1.5KE22ARL?","answer":"ST does not list an official successor for the 1.5KE22ARL. A pin-compatible replacement would need to match the 18.8 V standoff, 20.9 V breakdown, 39.3 V clamp, and 1500 W rating in a DO-201 package. The 1.5KE22A (same voltage, different suffix) or a third-party TVS with identical specs are candidates — verify the exact electrical and mechanical fit before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/1.5KE22ARL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/1.5KE22ARL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:58:49.717Z","lastPublished":"2026-07-16T14:58:49.717Z","indexable":true}}