{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH4R02D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH4R02D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH4R02D","factsUrl":"https://icboms.com/api/mcp/products/STTH4R02D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH4R02D ultrafast recovery diode, 200 V, 4 A, 30 ns trr, TO-220AC, through-hole, fast recovery ≤500 ns, >200 mA.","salesMarkdown":"## 30 ns reverse recovery — what it buys the switching stage The STTH4R02D is a 200 V, 4 A ultrafast recovery diode from STMicroelectronics, specified with a 30 ns reverse recovery time (trr). That trr figure is the headline parameter for a fast-recovery diode in a 200 V class — it directly sets the turn-off switching loss in a PFC boost stage, flyback clamp, or secondary-side snubber. At 4 A average rectified current (Io) and a forward voltage of 1.05 V at 4 A, conduction loss is moderate; the diode is a good fit for continuous-current mode (CCM) power converters running in the 50–150 kHz range where recovery charge dominates the loss budget. Housed in a TO-220AC (TO-220-2) through-hole package, the STTH4R02D is suited for board-level mounting with a heatsink tab. The through-hole form factor simplifies manual replacement in rework or repair scenarios compared to surface-mount alternatives.","metaTitle":"ST STTH4R02D Ultrafast Diode, 200 V 4 A, 30 ns trr, TO-220AC","metaDescription":"STMicroelectronics STTH4R02D 200 V 4 A ultrafast recovery diode, 30 ns trr, TO-220AC. Specifications and availability confirmed at quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Speed":"Fast Recovery =< 500ns, > 200mA (Io)","Series":"-","Package":"Tube","Technology":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH4R02","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"30 ns","Current - Reverse Leakage @ Vr":"3 µA @ 200 V","Voltage - DC Reverse (Vr) (Max)":"200 V","Current - Average Rectified (Io)":"4A","Operating Temperature - Junction":"175°C (Max)","Voltage - Forward (Vf) (Max) @ If":"1.05 V @ 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6ff59b5fa03d09cd172915f6b2c663f4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the STTH4R02D obsolete?","answer":"Yes, the STTH4R02D is listed as Obsolete. It is no longer manufactured by STMicroelectronics."},{"question":"What is the reverse recovery time of the STTH4R02D?","answer":"The reverse recovery time (trr) is 30 ns."},{"question":"What is the replacement for STTH4R02D?","answer":"ST does not list an official successor for the STTH4R02D. A replacement should be selected by matching the 200 V reverse voltage, 4 A average current, 30 ns trr, and TO-220AC package. Parametric equivalents from other manufacturers (e.g., similar ultrafast diodes in the same voltage/current class) can be cross-referenced, but pinout and thermal performance should be verified against the original design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH4R02D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH4R02D when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}