04028DA-12S-AWF 12V 1.0A 40mm NMB Cooling Fan for Power Supply PSU
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04028DA-12S-AWF 40mm PSU Cooling Fan for Bitmain APW8 / APW9 / APW9+
The 04028DA-12S-AWF is a 40x40x28mm 12V high-speed cooling fan used inside Bitmain APW8, APW9 and APW9+ power supplies. Rated at 1.0A and 18000 RPM with a 2-pin power interface, the 4028 form factor delivers the focused airflow these PSUs need to keep their primary-side MOSFETs and secondary rectifiers in their thermal envelope under 3000-3600W continuous load.
A dead, stalled or noisy 4028 fan is the most common cause of over-temperature shutdowns on aging APW8 / APW9 / APW9+ units. Swapping in a fresh 04028DA-12S-AWF restores the PSU's duty cycle without a full power-supply replacement.
Specifications
| Parameter | Value |
|---|---|
| Part number | 04028DA-12S-AWF |
| Condition | New |
| Category | Cooling fan (4028 PSU) |
| Dimensions | 40 x 40 x 28mm |
| Rated voltage | DC 12V |
| Rated current | 1.0A |
| Power | 12W |
| Rated speed | 18000 RPM |
| Power interface | 2-pin |
| Compatibility | Bitmain APW8, APW9, APW9+ PSU |
Compatibility
Drop-in fit for the 4028 fan bay inside the Bitmain APW8, APW9 and APW9+ power supplies. For the alternative 4028 variant used on the same APW8 / APW9 platforms, see the TFB0412EHN, W40S12BMF5 and YD4028HBL options in related products.
Where the 04028DA-12S-AWF fits
The fan mounts inside the APW8 / APW9 chassis, pushing air across the primary-side MOSFETs, EMI filter section and secondary-side rectifier heatsinks. Replacement requires opening the PSU shell — discharge the bulk capacitors before working inside, and re-solder the 2-pin power lead to the PCB header (or splice with crimped Faston terminals).
Common failure symptoms on aging APW8 / APW9 fans
- PSU runs hot to the touch within minutes of boot
- Over-temperature shutdown logged by the miner controller
- Audible bearing rattle or grinding from the PSU enclosure
- Fan visibly stalled when viewed through the exhaust grill
- PSU output sags under load — secondary-side rectifier overheating
Frequently asked questions
Is the 04028DA-12S-AWF pre-wired?
Yes — supplied with a 2-pin pigtail. Most APW8 / APW9 repairs require splicing or re-soldering to the PSU's internal fan header. Confirm polarity before powering up.
What's the difference between this and the TFB0412EHN / YD4028HBL?
All are 40x40x28mm 12V 4028-class PSU fans for the APW8 / APW9 family. RPM, bearing type and current draw vary — match against the spec label on the original fan, or contact us with a photo.
Will this fit the APW12 or APW17?
APW12 and APW17 use 60x60x25mm 6025-class fans, not 40mm 4028. See the YD120625BH, YD6025HSL or HD6025M12B options for those PSUs.
Can I run the fan at 5V to reduce noise?
Not recommended — at 12V rated the fan provides the airflow the PSU thermal model expects. Under-volting will lead to overtemperature shutdown under load.
Related products
- TFB0412EHN 40mm 4028 PSU Fan for APW8 / APW9 / APW12
- YD4028HBL 40mm 4028 PSU Fan for Bitmain APW8 / APW9 Repair
- W40S12BMF501 40mm 4028 PSU Fan for Bitmain APW9
- Bitmain APW8 10-11V PSU for Antminer S11 (Second-Hand)
- Bitmain APW9 3600W PSU for Antminer S17 / T17 / S17 Pro
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