{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH4R02FP","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH4R02FP","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH4R02FP","factsUrl":"https://icboms.com/api/mcp/products/STTH4R02FP","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH4R02FP, Fast Recovery Diode, Standard, 200 V, 4 A, 1.05 V @ 4 A, 30 ns, Through Hole, TO-220-2 Full Pack.","salesMarkdown":"## 30 ns reverse recovery — what it buys you The STTH4R02FP is a fast-recovery epitaxial diode with a reverse recovery time (trr) of 30 ns. That places it in the ultrafast class — fast enough for 100 kHz+ switching in a boost PFC stage or a flyback snubber, where a standard recovery diode would overheat from reverse-recovery losses. The 200 V reverse voltage and 4 A average forward current suit it for secondary-side rectification in offline power supplies up to a few hundred watts, or as a freewheeling diode across a relay or inductive load. Forward voltage drop is 1.05 V at 4 A, which is typical for a 200 V ultrafast in this current class. The 3 µA reverse leakage at 200 V is low enough that it won't affect efficiency in most designs, but worth noting if the diode sits across a high-impedance node in a hold-up circuit. ## TO-220 Full Pack — isolated tab matters The STTH4R02FP comes in a TO-220-2 Full Pack, also called TO-220FPAC. The key difference from a standard TO-220 is that the metal tab is fully encapsulated in plastic — electrically isolated. The trade-off is slightly higher thermal resistance junction-to-case compared to a standard TO-220, so the heatsink needs to be sized with that in mind. Mounting is through-hole, so it's a hand-solder or wave-solder part.","metaTitle":"STTH4R02FP Fast Recovery Diode, 200V 4A TO-220FPAC, Obsolete","metaDescription":"STTH4R02FP is a 200V 4A fast-recovery diode in TO-220FPAC with 30ns trr.","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","Diode Type":"Standard","Mounting Type":"Through Hole","Package / Case":"TO-220-2 Full Pack","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"STTH4R02","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220FPAC","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6ff59b5fa03d09cd172915f6b2c663f4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH4R02FP/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH4R02FP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH4R02FP 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}}