{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE120A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"1.5KE120A","canonicalUrl":"https://icboms.com/stmicroelectronics/1.5KE120A","factsUrl":"https://icboms.com/api/mcp/products/1.5KE120A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics 1.5KE120A, TRANSIL™ series, unidirectional TVS diode, 1500W peak pulse power, 102V reverse standoff, 212V clamping, DO-201AA axial package, through hole.","salesMarkdown":"## 1.5 kW transient suppressor for 102 V rails The STMicroelectronics 1.5KE120A is a unidirectional transient voltage suppression (TVS) diode from the 1.5KE series, also branded as TRANSIL™. The device is rated for a reverse standoff voltage of 102 V, with a minimum breakdown voltage of 114 V and a maximum clamping voltage of 212 V at the peak pulse current of 47 A (8/20 µs waveform). ## Clamping voltage and standoff — selecting the right rail The 114 V minimum breakdown voltage (VBR) is where the device starts to avalanche, and the 212 V maximum clamping voltage (VC) is the peak voltage the protected circuit sees during a 47 A surge (8/20 µs). The gap between VRWM and VC is the clamping headroom: a 102 V rail sees the clamp engage at roughly 114 V and hold the transient to 212 V, which is safe for downstream devices rated for 250 V or higher. For a 1500 W pulse, the 47 A peak current rating confirms the diode can absorb the energy without exceeding its thermal limit. ## Through-hole DO-201 — board-level mounting The 1.5KE120A is supplied in a DO-201AA (DO-27) axial-lead package, a through-hole footprint that suits wave-solder assembly or hand-soldering for prototyping and rework. The DO-201 body is rated for the 1500 W pulse without derating at 25 °C lead temperature; derating is linear above that per the datasheet curve. The axial leads allow in-line or vertical mounting on a PCB, and the package is compatible with standard 0.100-inch pitch holes. The part is available in cut tape (CT) and tape-and-box (TB) packaging options, which suit both prototype quantities and production reel requirements.","metaTitle":"1.5KE120A TVS Diode, 1500W, Unidirectional, DO-201","metaDescription":"1.5KE120A is a 1500W unidirectional TVS diode from STMicroelectronics, 102V standoff, 212V clamping, DO-201 axial package. Active lifecycle, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"1.5KE, TRANSIL™","Package":"Cut Tape (CT); Tape & Box (TB)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE120","Operating Temperature":"-","Power Line Protection":"No","Capacitance @ Frequency":"1000pF @ 1MHz","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"114V","Voltage - Clamping (Max) @ Ipp":"212V","Voltage - Reverse Standoff (Typ)":"102V","Current - Peak Pulse (10/1000µs)":"47A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/572f99690aeb2b0f302ed9cdcfd976ec.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5KE120A/alternatives.json"},"ai":{"faq":[{"question":"Is 1.5KE120A unidirectional or bidirectional?","answer":"The 1.5KE120A is a unidirectional TVS diode, with one anode and one cathode — it clamps positive transients above the breakdown voltage while conducting forward like a standard diode for negative surges. For bidirectional protection on AC lines, use the 1.5KE120CA variant."},{"question":"Is 1.5KE120A RoHS compliant and what is its lifecycle status?","answer":"RoHS compliance is standard for the 1.5KE series; confirm the specific date code and packaging for your region at time of order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/1.5KE120A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/1.5KE120A 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}}