{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH8R03D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH8R03D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH8R03D","factsUrl":"https://icboms.com/api/mcp/products/STTH8R03D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TURBOSWITCH™ ultrafast diode, STTH8R03D, 300 V reverse voltage, 8 A average rectified current, 30 ns reverse recovery time, 1.8 V forward drop at 8 A, TO-220AC through-hole package, 175°C max junction temperature.","salesMarkdown":"The STTH8R03D is a TURBOSWITCH™ ultrafast rectifier from STMicroelectronics, rated for 300 V reverse voltage and 8 A average forward current in a TO-220AC through-hole package. Its 30 ns reverse recovery time (trr) puts it in the ultrafast class — not just fast-recovery (which the catalog speed category also covers with ≤500 ns), but genuinely fast enough for 100+ kHz hard-switched converters where recovery losses and ringing dominate the efficiency budget. The 1.8 V forward drop at 8 A is the trade-off: you give up a few hundred millivolts compared to a softer-recovery diode to get that 30 ns turn-off. On a PFC boost stage or a secondary-side flyback clamp, that trr figure is what keeps the MOSFET from seeing a current spike on every cycle. ## Package and thermal handling — TO-220AC in the real world The TO-220AC is a two-lead through-hole package with the tab as the anode connection. It bolts to a heatsink with a single screw — common on PFC heatsinks and output rectifier brackets. Without a heatsink, derate aggressively above 100°C case temperature. The lead form is straight for vertical mounting; no right-angle bend option in this variant.","metaTitle":"STTH8R03D Ultrafast Diode, 300 V, 8 A, 30 ns trr, TO-220AC","metaDescription":"STTH8R03D ultrafast high-voltage diode: 300 V, 8 A average, 30 ns reverse recovery, 1.8 V forward drop at 8 A. Active lifecycle, TO-220AC through-hole 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":"TURBOSWITCH™","Package":"Tube","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH8","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"30 ns","Current - Reverse Leakage @ Vr":"10 µA @ 300 V","Voltage - DC Reverse (Vr) (Max)":"300 V","Current - Average Rectified (Io)":"8A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"1.8 V @ 8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/52a468a232522bdd9f9246f4519a242d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse recovery time (trr) of STTH8R03D?","answer":"The reverse recovery time is 30 ns, making it an ultrafast diode suitable for high-frequency switching applications like PFC and flyback converters."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH8R03D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH8R03D 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}}