OSG65R038 OSG65R038HZ MOSFET TO-247 600V 80A for PSU repair
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OSG65R038 / OSG65R038HZ MOSFET TO-247 600V 80A – ASIC Miner PSU Primary Switch
The OSG65R038HZ is a 600V 80A N-channel super-junction MOSFET in TO-247 package, deployed as a primary-side switch in high-power ASIC miner PSUs (3000-3500W class). It pairs a low ~38mΩ Rds(on) with the breakdown headroom needed for mains-rectified bus operation and the avalanche rating to survive sustained switching at 100kHz+. We source it brand new from our supply chain for ASIC PSU repair and refurbishment work — typical applications include the primary stages of APW9 / APW11 / APW12-class power supplies and aftermarket high-power units.
Where the OSG65R038HZ Sits in a Mining PSU
On a typical 3000-3500W mining PSU, the primary switching stage runs one or two TO-247 N-channel super-junction MOSFETs handling the rectified mains bus. The OSG65R038HZ is rated for that role with margin: 80A continuous current and 600V breakdown. Common failure mode is a shorted drain-source from sustained overcurrent or a single overvoltage spike — visible on a multimeter as ~0Ω D-S in both directions and a blown input fuse on next power-on. After clearing the upstream short, swapping in a fresh OSG65R038HZ is the standard ops repair.
Replacement Procedure
Disconnect the PSU from mains and bleed the primary bulk capacitors (5 minutes after AC removal, or use a 47kΩ bleed resistor for safety). Identify the failed MOSFET — typically shorted D-S in both directions, often paired with a darkened gate-drive resistor or a blown input fuse. Clear any short on the gate path before fitting the new device, otherwise the replacement will fail in seconds. Desolder the failed OSG65R038HZ from the heatsink, clean the heatsink contact area and apply fresh thermal compound, solder the new MOSFET (G-D-S left to right, front view), torque the heatsink screw to spec. Bench-test at low input voltage / current-limited before connecting full mains.
OSG65R038HZ Specifications
| Parameter | Value |
|---|---|
| Part Number | OSG65R038 / OSG65R038HZ |
| Type | N-Channel super-junction power MOSFET |
| Drain-Source Voltage | 600V |
| Continuous Current | 80A |
| Rds(on) | ~38mΩ at Vgs=10V |
| Package | TO-247 through-hole |
| Application | Primary-side switching in 3000-3500W ASIC miner PSUs |
| Bench Verify | Low-voltage / current-limited start before full mains |
| Condition | New |
Related 600V Mining PSU Switches
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- UJ4C075060K4S SiCFET – Bitmain APW17 PSU Repair
- SVF7N65F 650V N-Channel MOSFET – Crypto PSU Repair
Repairing 3000W+ mining PSUs in volume? Contact us at contact@lys-sz.com for tray-quantity OSG65R038HZ pricing. Worldwide shipping from our Shenzhen warehouse.
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