{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BYW51G-200","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"BYW51G-200","canonicalUrl":"https://icboms.com/stmicroelectronics/BYW51G-200","factsUrl":"https://icboms.com/api/mcp/products/BYW51G-200","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics BYW51G-200, Fast Recovery =< 500ns, > 200mA (Io), dual common-cathode rectifier, 200 V, 10 A per diode, 35 ns trr, D2PAK surface-mount package.","salesMarkdown":"The STMicroelectronics BYW51G-200 is a dual common-cathode fast-recovery rectifier in a D2PAK surface-mount package. It pairs two 200 V, 10 A rated diodes with a 35 ns reverse recovery time, making it suited for high-frequency switching power supplies, output rectification, and freewheeling or OR-ing diode applications where low switching loss matters. The 35 ns reverse recovery time is the key parametric for a fast-recovery diode. In a 100 kHz forward converter or PFC boost stage, that recovery charge directly sets the turn-off loss in the diode and the turn-on stress in the companion MOSFET. A slower 200 ns part would dump several times more stored charge into the switching node, raising junction temperature and EMI. The 35 ns figure keeps recovery losses low enough that a straightforward heatsink layout on the D2PAK tab can handle 10 A average without derating into thermal runaway. The BYW51G-200 carries an Obsolete product status. STMicroelectronics no longer manufactures this device in volume. If your design can accommodate a footprint-compatible alternative, the STMicroelectronics BYW51 series includes other current and voltage variants that may still be active — verify the specific order code against the latest ST product selector. ## Package and thermal path The D2PAK (TO-263AB) is a surface-mount package with a large metal tab that carries the common cathode connection. For a 10 A per-diode average current, the tab must be soldered to a sufficient copper area on the PCB — a minimum of 1 in² per device is a reasonable starting point for natural convection. The junction is rated to 150 °C maximum, so the thermal resistance from junction to ambient through the board footprint determines the real-world current derating.","metaTitle":"STMicroelectronics BYW51G-200 Fast Recovery Diode, 200 V","metaDescription":"BYW51G-200 dual common-cathode fast recovery rectifier: 200 V, 10 A per diode, 35 ns 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":"Tube","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":"BYW51","Diode Configuration":"1 Pair Common Cathode","Supplier Device Package":"D2PAK","Reverse Recovery Time (trr)":"35 ns","Current - Reverse Leakage @ Vr":"15 µA @ 200 V","Voltage - DC Reverse (Vr) (Max)":"200 V","Operating Temperature - Junction":"150°C (Max)","Voltage - Forward (Vf) (Max) @ If":"850 mV @ 8 A","Current - Average Rectified (Io) (per Diode)":"10A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/922acfeb05a612ca176d4ed85108d55b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for BYW51G-200?","answer":"STMicroelectronics does not list a direct pin-compatible replacement under the BYW51 base number for this specific voltage and current combination. The BYW51 series includes other 200 V and 10 A variants that may share the D2PAK footprint — check the latest ST product selector for active order codes. For an exact drop-in, the independent surplus channel is the practical source."},{"question":"What is the reverse recovery time of BYW51G-200?","answer":"The reverse recovery time (trr) is 35 ns, which qualifies it as a fast-recovery diode suitable for switching frequencies above 50 kHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/BYW51G-200","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/BYW51G-200 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:11:35.314Z","lastPublished":"2026-07-16T15:11:35.314Z","indexable":true}}