{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS140UY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS140UY","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS140UY","factsUrl":"https://icboms.com/api/mcp/products/STPS140UY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS140UY, Q Automotive series, Schottky diode, 40 V reverse, 1 A average, 650 mV forward drop at 2 A, SMB surface-mount package, -40°C to 150°C junction.","salesMarkdown":"## 40 V reverse — the blocking ceiling for a 24 V rail with margin The STPS140UY is an automotive-grade Schottky rectifier from STMicroelectronics, rated for 40 V reverse voltage and 1 A average forward current. Typical applications include reverse-polarity protection, freewheeling diodes in DC-DC converters, and OR-ing diodes in automotive ECU power feeds. ## Forward drop and leakage — thermal budget drivers Reverse leakage is specified at 12 µA at 40 V and 25°C junction temperature. Both parameters shift with temperature — Vf decreases slightly while leakage rises exponentially above 100°C, so the SMB package's copper pad area under the cathode tab directly affects the junction temperature rise. ## Active lifecycle, automotive qualification The Q Automotive series designation means it is tested to AEC-Q101 stress conditions, covering temperature cycling, high-temperature reverse bias, and humidity.","metaTitle":"STPS140UY Schottky Diode, 40 V, 1 A, SMB, AEC-Q101","metaDescription":"STPS140UY automotive Schottky rectifier: 40 V reverse, 1 A average, 650 mV Vf at 2 A, 12 µA leakage. SMB package, -40 to 150°C junction.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Q Automotive","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS140","Capacitance @ Vr, F":"-","Supplier Device Package":"SMB","Current - Reverse Leakage @ Vr":"12 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"1A","Operating Temperature - Junction":"-40°C~150°C","Voltage - Forward (Vf) (Max) @ If":"650 mV @ 2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3070","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/143dc4379ad99e4ae9e8bae60c625141.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS140UY/alternatives.json"},"ai":{"faq":[{"question":"Is STPS140UY automotive qualified?","answer":"Yes, it is part of ST's Q Automotive series, which means it is qualified to AEC-Q101 stress requirements. It is suitable for automotive applications including ECU power supplies, lighting, and motor drive freewheeling diodes."},{"question":"What package is STPS140UY?","answer":"The STPS140UY is supplied in a DO-214AA (SMB) surface-mount package."},{"question":"What is the reverse leakage current of STPS140UY?","answer":"Reverse leakage is 12 µA typical at 40 V reverse voltage and 25°C junction temperature. Leakage increases with junction temperature — at 150°C it can be orders of magnitude higher, so thermal management is important."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS140UY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS140UY 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}}