{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH302","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH302","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH302","factsUrl":"https://icboms.com/api/mcp/products/STTH302","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH302, Fast Recovery Diode, Standard, 200 V, 3 A, 35 ns trr, 950 mV Vf @ 3 A, 3 µA leakage @ 200 V, DO-201AD Axial, Through Hole, 175°C junction.","salesMarkdown":"## 35 ns reverse recovery — what it buys you The STTH302 is a 200 V, 3 A fast-recovery epitaxial diode from STMicroelectronics in a DO-201AD axial-lead package. Its 35 ns reverse recovery time (trr) puts it in the class of diode you pick for the boost stage of a PFC front-end or the output rectifier of a 100 kHz flyback converter — not for 50 Hz line rectification, where a standard 1N5408 would do. The 950 mV forward drop at 3 A is the trade-off for that speed; a Schottky at this voltage rating would drop less but lack the 175°C junction rating and the ruggedness against reverse-recovery snap-off that this part's epitaxial construction provides. ## Package and thermal — the DO-201AD reality The DO-201AD axial package is a through-hole format that needs the leads formed and inserted into the board. At 3 A continuous, the junction-to-ambient thermal resistance of this package means you will want adequate copper pad area or forced airflow if the ambient is above 50°C. For a rework or repair scenario, the axial leads make this a straightforward hand-solder swap — no hot-air profile needed.","metaTitle":"STTH302 Fast Recovery Diode, 200V 3A 35ns trr DO-201AD","metaDescription":"STTH302 fast recovery diode from STMicroelectronics: 200V Vrrm, 3A Io, 35ns trr, DO-201AD axial package.","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":"-","Package":"Cut Tape (CT); Tape & Box (TB)","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"DO-201AD, Axial","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH302","Capacitance @ Vr, F":"-","Supplier Device Package":"DO-201AD","Reverse Recovery Time (trr)":"35 ns","Current - Reverse Leakage @ Vr":"3 µA @ 200 V","Voltage - DC Reverse (Vr) (Max)":"200 V","Current - Average Rectified (Io)":"3A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"950 mV @ 3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f0d5c6cbdb9b8869ff3b19b9f79cf091.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STTH302?","answer":"A common cross-shop candidate is the MUR320 from ON Semiconductor, also a 200 V, 3 A ultrafast rectifier in DO-201AD. The MUR320 has a slightly different trr spec (typically 30 ns vs the STTH302's 35 ns) and a different forward voltage curve. Both are pin-to-pin compatible in the same axial footprint, so the choice comes down to the specific switching loss and Vf trade-off at your operating point."},{"question":"Can STTH302 replace 1N5408?","answer":"Not directly. The 1N5408 is a 3 A standard recovery rectifier with no trr spec — it is meant for 50/60 Hz line frequency. The STTH302 is a fast-recovery diode with a 35 ns trr, designed for switching frequencies above 20 kHz. In a low-frequency rectifier circuit the STTH302 will work electrically, but it is overkill and may cost more. In a switching supply the 1N5408 will overheat due to its slow recovery."},{"question":"Is STTH302 RoHS compliant?","answer":"The STTH302 is listed with standard lead-free plating and is RoHS compliant per STMicroelectronics' current product documentation. The specific date code and certificate of compliance can be provided with the order upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH302","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH302 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}}