{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BYW77G-200-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BYW77G-200-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/BYW77G-200-TR","factsUrl":"https://icboms.com/api/mcp/products/BYW77G-200-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BYW77G-200-TR, Fast Recovery Diode, 200 V DC Reverse, 25 A Average Rectified, 50 ns Reverse Recovery Time, D2PAK (TO-263-3), Surface Mount, Tape & Reel.","salesMarkdown":"## What this fast recovery diode brings to a PFC or flyback stage The STMicroelectronics BYW77G-200-TR is a 200 V, 25 A fast recovery diode in a D2PAK (TO-263-3) surface-mount package. Its 50 ns reverse recovery time (trr) is the key switching parameter — it determines the turn-off loss in a continuous-conduction-mode PFC boost stage or the snubber clamp dissipation in a flyback converter. The 1.15 V forward drop at 40 A gives a reasonable conduction loss trade-off for a 25 A average-rated part. A 50 ns trr is fast enough to keep the reverse-recovery charge low in a 100 kHz hard-switched PFC stage, which directly reduces the MOSFET turn-on loss and the EMI filter burden. Slower diodes in this voltage class (200-500 ns) would require a larger snubber or a higher dead-time, eating into efficiency. The 25 µA reverse leakage at 200 V is tight for a 25 A die — expect it to double around 125°C junction, but still manageable for most offline power supplies. ## Obsolete — no longer in production The BYW77G-200-TR is listed as Obsolete by STMicroelectronics. For new designs, look at current-generation fast-recovery diodes in the same D2PAK footprint — parts like the STTH30R04 or similar 300 V / 30 A rated devices from ST or Vishay may fit, but verify pin-compatibility and thermal pad geometry. For existing BOM lines, the only channel is surplus or independent distribution. ## D2PAK — surface-mount assembly and heatsinking At 25 A average, the junction-to-case thermal path is the limit — expect the board copper area to need at least 2-3 square inches of 2 oz copper to keep the junction below 125°C in a 50°C ambient. The Tape & Reel (TR) suffix means it ships on a 13-inch reel, typically 800 or 1000 pieces per reel depending on the supplier's packing code.","metaTitle":"BYW77G-200-TR Fast Recovery Diode, 200V 25A 50ns","metaDescription":"BYW77G-200-TR fast recovery diode from STMicroelectronics, 200V 25A average rectified, 50ns trr, D2PAK.","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":"Tape & Reel (TR)","Technology":"Standard","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D²Pak (2 Leads + Tab), TO-263AB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"BYW77","Capacitance @ Vr, F":"-","Supplier Device Package":"D2PAK","Reverse Recovery Time (trr)":"50 ns","Current - Reverse Leakage @ Vr":"25 µA @ 200 V","Voltage - DC Reverse (Vr) (Max)":"200 V","Current - Average Rectified (Io)":"25A","Operating Temperature - Junction":"-40°C ~ 150°C","Voltage - Forward (Vf) (Max) @ If":"1.15 V @ 40 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.4907","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://www.st.com/content/ccc/resource/technical/document/datasheet/20/7e/c9/dd/da/31/41/68/CD00001019.pdf/files/CD00001019.pdf/jcr:content/translations/en.CD00001019.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reverse recovery time of BYW77G-200-TR?","answer":"The reverse recovery time (trr) is 50 ns, measured at standard test conditions for a fast recovery diode. This is the headline switching spec for the part."},{"question":"Is BYW77G-200-TR obsolete?","answer":"Yes, STMicroelectronics lists the BYW77G-200-TR as Obsolete. No official replacement order code is provided. For production continuity, qualify a current-generation fast-recovery diode in the same D2PAK footprint."},{"question":"What is the speed rating of BYW77G-200-TR?","answer":"The speed is classified as Fast Recovery =< 500 ns, > 200 mA (Io). The actual trr is 50 ns, well within that class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BYW77G-200-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BYW77G-200-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:15:22.618Z","lastPublished":"2026-07-16T15:15:22.618Z","indexable":true}}