MDF5N50F N-channel MOSFET 500V for Avalon Miner Power Supply repair
Couldn't load pickup availability
Have questions about this product? Our team is here to help — just reach out on WhatsApp.
💬 Contact Us on WhatsAppAbout the Product
MDF5N50F 500V 4.5A N-Channel MOSFET for Avalon Miner PSU Repair
The MDF5N50F is a 500V N-channel power MOSFET designed for switch-mode power supplies, HID lighting and general-purpose high-voltage switching. It is widely used inside Avalon miner power supply units in the auxiliary supply, snubber and clamp stages where a 500V class TO-220 device is required.
With a 27W maximum power dissipation and 4.5A drain current at VGS=10V, the MDF5N50F is well suited to repair shops servicing Canaan Avalon PSUs that need a reliable, RoHS-compliant replacement device.
Specifications
| Parameter | Value |
|---|---|
| Part number | MDF5N50F |
| Condition | New |
| Channel type | N-channel enhancement-mode |
| Vds (drain-source voltage) | 500V |
| Id (drain current) | 4.5A @ VGS = 10V |
| Maximum power dissipation | 27W |
| Switching performance | High switching performance with low on-resistance |
| Typical applications | SMPS, HID lighting, general-purpose 500V switching |
| Primary use | Avalon miner PSU repair |
| Mounting | Through-hole |
Where the MDF5N50F fits in an Avalon PSU
Avalon power supplies use 500V class N-channel MOSFETs in the auxiliary flyback supply that powers the PFC controller, the gate driver and the cooling fans. The MDF5N50F also sees use in snubber and active-clamp circuits around the main transformer. Repair-shop wear typically shows up as a dead standby supply, a no-start condition or a burnt-through clamp circuit.
Compatibility
Use as a direct replacement for MDF5N50F footprints on Avalon PSU boards. Confirm Vds, Id and package outline against the original part marking before fitting; 500V class TO-220 devices share footprints but pinouts and Rds(on) can differ.
Common failure symptoms
- Avalon PSU does not start — no auxiliary rail voltage on the PFC IC
- Standby light on the PSU never comes up after AC connection
- Burnt-through clamp resistor or burn marks around the auxiliary transformer
- Hiccup mode at start-up with the main PSU never enabling
- Diode test reads short between drain and source on the suspect MOSFET
Frequently asked questions
Which Avalon PSU revisions use the MDF5N50F?
Common across multiple Avalon PSU3300 / AvalonMiner Plus PSU revisions. Share a photo of the PSU label or the failed part and we will confirm before shipment.
Is the MDF5N50F a direct cross for other 500V TO-220 N-channel MOSFETs?
Treat it as a candidate replacement. Check Rds(on), Qg, package outline and lead pitch against the original device marking before fitting.
What collateral damage should I check before powering back up?
Inspect the auxiliary transformer, the bias diodes, the start-up resistor network and any clamp components around the failed MOSFET. Powering back up without these checks is a common cause of repeat failures.
Do you stock it in volume?
Yes, contact us for bulk pricing tailored to Avalon PSU repair production lines.
Related products
- 3PCS01 ICE3PCS01G PFC IC for Avalon PSU3300
- LP3986-18B3F Ultra-Low-Noise LDO for Avalon ASIC
- STW48N60DM2 600V N-Channel Power MOSFET
- GBU3008 800V 30A Bridge Rectifier for PSU Repair
Contact contact@lys-sz.com for volume pricing or compatibility questions.
Worldwide shipping from our Shenzhen warehouses. DDP available for US and EU customers.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
