{"product_id":"cvfd20065a-650v-schottky-diode-whatsminer-p21d-power-supply-repair","title":"CVFD20065A Schottky Diode for Whatsminer P21D Power Supply Repair","description":"\u003ch2\u003eCVFD20065A 650V 26A Silicon Carbide Schottky Diode | Whatsminer P21D PSU Repair\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eCVFD20065A\u003c\/strong\u003e is a \u003cstrong\u003eWolfspeed (Cree) Z-Rec® 650V silicon carbide (SiC) Schottky rectifier diode\u003c\/strong\u003e in the \u003cstrong\u003eTO-220-2\u003c\/strong\u003e package — the secondary-side rectifier diode used on the \u003cstrong\u003eWhatsminer P21D power supply\u003c\/strong\u003e. SiC Schottky diodes are the standard for high-frequency, high-efficiency PSU rectification: \u003cstrong\u003eforward voltage drop VF max 1.45V @ 20A\u003c\/strong\u003e, near-zero reverse recovery, and excellent thermal behavior — all critical in a continuously-running ASIC PSU where every watt of conversion loss becomes board heat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSourcing note:\u003c\/strong\u003e the CVFD20065A is officially obsolete at Wolfspeed (production discontinued) and no longer manufactured. We carry available stock specifically for P21D PSU repair where the original part needs an exact OEM-match replacement; once current inventory clears, customers will need to pivot to a Wolfspeed pin-compatible substitute (Wolfspeed C3D20065D \/ C3D20065D1 series).\u003c\/p\u003e\n\u003cp\u003eThe CVFD20065A features \u003cstrong\u003ezero forward and reverse recovery voltage\u003c\/strong\u003e, \u003cstrong\u003etemperature-independent switching behavior\u003c\/strong\u003e, and \u003cstrong\u003eextremely fast switching times\u003c\/strong\u003e. Its \u003cstrong\u003epositive temperature coefficient on VF\u003c\/strong\u003e means devices can be paralleled without thermal runaway — a useful property when the P21D PSU design uses multiple rectifiers in parallel on the output stage.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the CVFD20065A in a P21D PSU\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePSU produces no output\u003c\/strong\u003e while AC input is present — secondary-side rectifier shorted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePSU output rail droops under load\u003c\/strong\u003e — degraded diode with elevated VF.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage\u003c\/strong\u003e on the TO-220 body — cracked package, burnt leads, lifted tab.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode-test shows open or shorted junction\u003c\/strong\u003e on the multimeter — either failure mode.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive heatsink temperature\u003c\/strong\u003e on the rectifier section during light-load operation — sign of elevated conduction loss.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs and Technical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e650V Schottky rectifier\u003c\/strong\u003e — covers the secondary-side voltage envelope on Whatsminer P21D PSU.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e26A continuous current rating\u003c\/strong\u003e — full headroom for ASIC PSU output rectification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTO-220-2 package\u003c\/strong\u003e — standard heatsink-mounted footprint, direct fit for P21D PSU layout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced forward voltage drop (VF)\u003c\/strong\u003e — lower conduction loss than equivalent silicon diodes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero reverse recovery\u003c\/strong\u003e — eliminates switching loss at PSU operating frequencies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely fast switching\u003c\/strong\u003e — temperature-independent switching behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive temperature coefficient on VF\u003c\/strong\u003e — supports parallel device operation without thermal runaway.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh humidity resistance\u003c\/strong\u003e — stable performance in challenging mining-farm environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCVFD20065A SiC Schottky Diode Specifications\u003c\/h4\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 54.83389%;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"width: 44.120814%;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eWolfspeed (Cree) — Z-Rec® family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eSilicon Carbide (SiC) Schottky Diode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eVoltage Rating (VR)\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003e650V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eCurrent Rating (IF)\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003e26A (LYS spec); Wolfspeed datasheet 20A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003ePackage\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eTO-220-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eForward Voltage Drop (VF max @ 20A)\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003e1.45V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eForward Surge Current (IFSM)\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003e206A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eProduction Status\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eObsolete at Wolfspeed; available from LYS for repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eReverse Recovery Voltage\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eZero\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eSwitching Speed\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eExtremely fast\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eTemperature Coefficient on VF\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003ePositive (parallel-safe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eSwitching Losses\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eVirtually none\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eParallel Device Compatibility\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eNo thermal runaway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 54.83389%;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"width: 44.120814%;\"\u003eWhatsminer P21D PSU secondary-side rectifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — CVFD20065A SiC Schottky Diode\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: SiC Schottky vs silicon Schottky vs ultrafast — what's the difference for PSU repair?\u003c\/strong\u003e\u003cbr\u003eA: SiC Schottky diodes have lower VF and zero reverse recovery vs silicon equivalents — meaning lower conduction loss AND lower switching loss at the same time. Ultrafast silicon rectifiers have fast switching but higher VF. For modern ASIC PSU repair, SiC is the right call when the original part is SiC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I substitute a different SiC Schottky with 650V\/26A rating?\u003c\/strong\u003e\u003cbr\u003eA: Yes — Wolfspeed's pin-compatible C3D20065D family (TO-220-2 or TO-247-3 variants) is the natural drop-in successor since the CVFD20065A is officially obsolete. Verify package (TO-220-2 vs TO-247-3), lead arrangement, and IFSM rating all match before placing the part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the diode need a heatsink?\u003c\/strong\u003e\u003cbr\u003eA: Yes — the TO-220-2 package mounts to a heatsink on the P21D PSU. Apply fresh thermal compound (paste or thermal pad) when installing the replacement diode and torque the mounting screw to spec.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I test the diode in-circuit?\u003c\/strong\u003e\u003cbr\u003eA: Power off the PSU, discharge bulk capacitors, then use a multimeter in diode-test mode. A healthy SiC Schottky shows ~0.9-1.3V forward drop and OL in reverse. A shorted diode shows ~0V both directions; an open diode shows OL both directions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing for repair shops?\u003c\/strong\u003e\u003cbr\u003eA: Yes — email contact@lys-sz.com for tray-quantity pricing.\u003c\/p\u003e\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/osg65r069h-enhancement-mode-nchannel-power-mosfet-whatsminer-p21-power-supply\"\u003eOSG65R069H N-Channel Power MOSFET (Whatsminer P21 PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/osg65r038hz-650v-mosfet-whatsminer-p21d-psu-repair\"\u003eOSG65R038HZ 650V MOSFET (Whatsminer P21D PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2200uf-25v-aluminum-electrolytic-capacitor-whatsminer-power-supply\"\u003e2200µF 25V Aluminum Electrolytic Capacitor (Whatsminer PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/chz02s112la2-power-relay-whatsminer-p221c-p222c\"\u003eCHZ02-S-112LA2 Power Relay (Whatsminer P221C \/ P222C)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRepair benches stocking CVFD20065A SiC Schottky diodes for P21D PSU rebuilds in volume? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing and matched PSU repair kits. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":43042950643891,"sku":null,"price":22.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/CVFD20065A-650V-26A-Silicon-Carbide-Schottky-Diode-Whatsminer-P21D-Power-Supply-Repair_2.webp?v=1744701129","url":"https:\/\/lys-sz.com\/products\/cvfd20065a-650v-schottky-diode-whatsminer-p21d-power-supply-repair","provider":"LYS Shenzhen","version":"1.0","type":"link"}