{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH3R06UFY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH3R06UFY","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH3R06UFY","factsUrl":"https://icboms.com/api/mcp/products/STTH3R06UFY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics Automotive series STTH3R06UFY fast recovery diode, 600 V, 3 A, 50 ns trr, AEC-Q101, DO-221AA SMB Flat Leads, surface mount.","salesMarkdown":"## 600 V, 3 A, 50 ns trr — what this diode does in the circuit The STTH3R06UFY is an STMicroelectronics fast-recovery rectifier rated for 600 V reverse voltage and 3 A average forward current, with a 50 ns reverse recovery time. It is qualified to AEC-Q101 and comes in the low-profile SMB Flat Leads package (DO-221AA). This part is designed for the output rectification stage of a 400 V bus PFC, as a snubber clamp in a flyback converter, or as a boost diode in an automotive DC-DC converter where the junction temperature can hit 175°C. ## 50 ns trr — the switching-speed decision A 50 ns reverse recovery time at 3 A is the spec that makes this diode useful in hard-switched topologies. In a continuous-conduction-mode PFC, the diode's stored charge during turn-off creates a current spike that hits the MOSFET — a slower recovery diode (200 ns or more) burns extra switching loss and risks EMI. The 50 ns trr keeps that spike manageable up to the 100 kHz range. If your design runs above 150 kHz, you would typically step to an SiC Schottky, but for the 50–100 kHz sweet spot this is the right recovery speed. ## AEC-Q101 and 175°C junction — where it survives The SMB Flat Leads package has a low thermal resistance to the board, but the via pattern under the pad still determines the real junction temperature at 3 A continuous. ## 1.9 V forward drop at 3 A — the conduction loss trade The forward voltage is 1.9 V maximum at 3 A, which is typical for a 600 V fast-recovery diode in this current class. At 3 A that is 5.7 W conduction loss — the SMB Flat Leads package needs a decent copper area to spread that heat. If the board is space-constrained or the ambient is high, the designer may need to parallel two diodes or move to a DPAK part. The 3 µA reverse leakage at 600 V is low enough that it does not matter until the junction temperature passes 125°C, where leakage roughly doubles per 10°C.","metaTitle":"STTH3R06UFY 600V 3A Fast Recovery Diode, AEC-Q101, 50 ns trr","metaDescription":"STMicroelectronics STTH3R06UFY 600V 3A fast recovery diode in SMB Flat Leads package, 50 ns trr, AEC-Q101 qualified, -40°C to 175°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":"Automotive, AEC-Q101, ECOPACK®2","Package":"Tape & Reel (TR); Cut Tape (CT)","Diode Type":"Standard","Mounting Type":"Surface Mount","Package / Case":"DO-221AA, SMB Flat Leads","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH3","Capacitance @ Vr, F":"-","Supplier Device Package":"SMBflat","Reverse Recovery Time (trr)":"50 ns","Current - Reverse Leakage @ Vr":"3 µA @ 600 V","Voltage - DC Reverse (Vr) (Max)":"600 V","Current - Average Rectified (Io)":"3A","Operating Temperature - Junction":"-40°C~175°C","Voltage - Forward (Vf) (Max) @ If":"1.9 V @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d9461394f60ade11e94165bd17ac1386.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH3R06UFY?","answer":"The reverse recovery time (trr) is 50 ns, measured at the rated forward current and recovery conditions typical for a fast-recovery diode."},{"question":"Is STTH3R06UFY AEC-Q101 qualified?","answer":"Yes, it is listed in the Automotive series and carries AEC-Q101 qualification, making it suitable for automotive-grade applications."},{"question":"What package is STTH3R06UFY?","answer":"It is supplied in the DO-221AA package with SMB Flat Leads, a surface-mount package designed for low-profile automotive and industrial boards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH3R06UFY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH3R06UFY 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}}