{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STPS340SY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STPS340SY","canonicalUrl":"https://icboms.com/stmicroelectronics/STPS340SY","factsUrl":"https://icboms.com/api/mcp/products/STPS340SY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STPS340SY, Automotive AEC-Q101 Schottky diode, 40 V reverse, 3 A forward, 630 mV Vf at 3 A, 20 µA leakage at 40 V, 150 °C junction, DO-214AB SMC package.","salesMarkdown":"## Schottky rectifier for automotive power rails The STPS340SY is a 40 V, 3 A Schottky rectifier in a DO-214AB (SMC) surface-mount package, qualified to AEC-Q101 for automotive applications. Its 630 mV typical forward drop at 3 A keeps conduction losses low in DC-DC converter output rectification, freewheeling diodes, and reverse-polarity protection circuits. The 3 A average forward current supports moderate loads like relay coils, solenoid drivers, and low-power motor freewheel paths. Forward voltage of 630 mV at 3 A sets the conduction loss at roughly 1.9 W under full load — the DO-214AB package's copper pad area on the PCB must be sized to keep junction temperature below the 150 °C maximum. Reverse leakage is specified at 20 µA at 40 V, 25 °C — expect it to rise with junction temperature, so a design running near the thermal limit should budget for increased leakage at high ambient. ## Package and footprint — DO-214AB (SMC) The DO-214AB (SMC) package is a standard surface-mount outline with a large cathode tab for heat sinking. The SMC footprint is larger than the smaller SMA/SMB variants, which helps spread thermal dissipation but requires matching pad geometry on the PCB.","metaTitle":"STPS340SY Schottky Diode, 40 V 3 A, AEC-Q101, SMC","metaDescription":"STPS340SY Schottky diode rated 40 V reverse, 3 A forward, 630 mV Vf at 3 A. AEC-Q101 qualified, 150 °C junction temp, DO-214AB SMC package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"Automotive, AEC-Q101","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Schottky","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STPS340","Capacitance @ Vr, F":"-","Supplier Device Package":"SMC","Current - Reverse Leakage @ Vr":"20 µA @ 40 V","Voltage - DC Reverse (Vr) (Max)":"40 V","Current - Average Rectified (Io)":"3A","Operating Temperature - Junction":"-40°C~150°C","Voltage - Forward (Vf) (Max) @ If":"630 mV @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8400","priceTiers":[{"qty":1,"price":"$0.84000","currency":"USD"},{"qty":10,"price":"$0.68600","currency":"USD"},{"qty":100,"price":"$0.53360","currency":"USD"},{"qty":500,"price":"$0.45232","currency":"USD"},{"qty":1000,"price":"$0.36847","currency":"USD"},{"qty":2500,"price":"$0.34687","currency":"USD"},{"qty":5000,"price":"$0.33035","currency":"USD"},{"qty":12500,"price":"$0.31510","currency":"USD"},{"qty":25000,"price":"$0.31450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/715b7df5ec5f46cc5f19c21671d0d448.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STPS340SY/alternatives.json"},"ai":{"faq":[{"question":"Is STPS340SY AEC-Q101 qualified for automotive use?","answer":"Yes, the STPS340SY is part of the Automotive series and is AEC-Q101 qualified, making it suitable for automotive under-hood and chassis-domain applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STPS340SY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STPS340SY 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}}