{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STTH20R04D","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STTH20R04D","canonicalUrl":"https://icboms.com/stmicroelectronics/STTH20R04D","factsUrl":"https://icboms.com/api/mcp/products/STTH20R04D","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STTH20R04D, Fast Recovery Diode, 400V Vr, 20A Io, 45 ns trr, 1.7V Vf at 20A, TO-220AC, Through Hole, -65 to 175°C junction.","salesMarkdown":"## 45 ns reverse recovery — the switching-loss ceiling The STTH20R04D is a 400 V, 20 A fast-recovery epitaxial diode from STMicroelectronics, in a TO-220AC through-hole package. Its 45 ns reverse recovery time (trr) is the number that decides whether it works in a high-frequency PFC boost stage or a line rectifier. ## 20 A continuous, 1.7 V forward drop — thermal budget ## 400 V blocking, 20 µA leakage — rail margin The 400 V reverse voltage rating covers a 230 VAC rectified rail (≈325 VDC) with 75 V headroom. Reverse leakage is 20 µA at 400 V, 25 °C — negligible for standby power, but it rises with temperature; at 125 °C junction the leakage can increase by an order of magnitude, so factor that into the off-state loss estimate for high-temperature operation.","metaTitle":"STTH20R04D 400V 20A Fast Recovery Diode, TO-220AC, 45 ns trr","metaDescription":"STTH20R04D: 400V, 20A fast recovery rectifier in TO-220AC. 45 ns trr, 1.7V Vf at 20A. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","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","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"STTH20","Capacitance @ Vr, F":"-","Supplier Device Package":"TO-220AC","Reverse Recovery Time (trr)":"45 ns","Current - Reverse Leakage @ Vr":"20 µA @ 400 V","Voltage - DC Reverse (Vr) (Max)":"400 V","Current - Average Rectified (Io)":"20A","Operating Temperature - Junction":"175°C(Max)","Voltage - Forward (Vf) (Max) @ If":"1.7 V @ 20 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6300","priceTiers":[{"qty":1,"price":"$1.63000","currency":"USD"},{"qty":10,"price":"$1.33700","currency":"USD"},{"qty":100,"price":"$1.03970","currency":"USD"},{"qty":500,"price":"$0.88128","currency":"USD"},{"qty":1000,"price":"$0.71790","currency":"USD"},{"qty":2000,"price":"$0.67582","currency":"USD"},{"qty":5000,"price":"$0.64363","currency":"USD"},{"qty":10000,"price":"$0.61393","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0ba69a2dc459e968a8d8f04af9d077ac.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STTH20R04D/alternatives.json"},"ai":{"faq":[{"question":"What is the reverse recovery time of STTH20R04D?","answer":"The STTH20R04D has a reverse recovery time (trr) of 45 ns, which qualifies it as a fast recovery diode (≤500 ns at >200 mA). This 45 ns trr is the key parameter for switching applications like PFC boost stages and output rectification in switch-mode power supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STTH20R04D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STTH20R04D 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}}