TFB0412EHN 40mm PSU Cooling fan 18000rpm 2-pin for Bitmain APW8 APW9
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TFB0412EHN 40mm 12V High-Speed Cooling Fan for Bitmain APW8 / APW9 / APW12 PSU
The TFB0412EHN is a 40x40x28mm 12VDC high-speed cooling fan used inside the Bitmain APW8, APW9 and APW9+ power supplies. With 18000 RPM rated speed, a 0.87A current draw and 26.03 CFM airflow, it delivers the focused high-pressure airflow needed to pull heat off the PSU's primary-side MOSFETs and secondary-side rectifiers under sustained mining load.
A failed or seized PSU fan is the leading cause of over-temperature shutdowns on aging APW8 / APW9 / APW12 units — the PSU runs hot enough to trip its protection circuit within minutes of boot. The 40x28mm form factor and 2-pin connector match the OEM slot exactly, making this a straight repair-shop swap.
Specifications
| Parameter | Value |
|---|---|
| Part number | TFB0412EHN |
| Condition | New |
| Dimensions | 40mm x 40mm x 28mm |
| Bearing | Superflo |
| Rated voltage | DC 12V |
| Rated current | 0.87A |
| Rotation speed | 18000 RPM |
| Airflow | 26.03 CFM |
| Noise level | 58.00 dB(A) |
| Connector | 2-pin |
| Compatibility | Bitmain APW8, APW9, APW9+ (drop-in) |
Compatibility
The 4028 form factor fits the internal fan slot on Bitmain APW8, APW9 and APW9+ power supplies. For 4028 alternatives on the same APW family, see the related 04028DA-12S-AWF and FFB0412VHN listings. For 6025 PSU fans used on APW12 / APW17, see the YD120625BH and PSAD16025BM variants in related products.
Where the TFB0412EHN fits
The fan is mounted internally inside the APW8 / APW9 chassis, blowing across the primary-side MOSFETs and secondary-side rectifier heatsinks. Replacement requires opening the PSU shell — discharge the bulk caps before working inside, and re-solder the 2-pin power lead to the PCB header (or splice with crimped Faston terminals).
Common failure symptoms
- 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 looking through the PSU exhaust grill
- PSU output sags under load — secondary-side rectifier overheating
Frequently asked questions
Is the TFB0412EHN PWM-controlled?
No — the connector is 2-pin (12V + GND). The fan spins at full 18000 RPM when powered. PSU fan speed is not actively modulated by the APW8 / APW9 controller.
What's the difference between TFB0412EHN, 04028DA-12S-AWF and FFB0412VHN?
All three are 40x40x28mm 12V PSU fans for the APW family. RPM, airflow and bearing types vary — match against the spec label on the original fan, or contact us with a photo for confirmation.
Is 58 dB(A) loud?
Yes — a single 18000 RPM 40mm fan running at full speed is audible across a room. The PSU enclosure attenuates some of the noise. For quieter alternatives, the rest of the miner's chassis fans dominate the overall noise floor under hashing load.
Can I run the TFB0412EHN at lower voltage to reduce noise?
Undervolting will reduce airflow proportionally and risk PSU overheating. Keep it at the rated 12V.
Related products
- 04028DA-12S-AWF 40mm Bitmain PSU Cooling Fan
- FFB0412VHN 40mm 4028 Cooling Fan for APW9 / APW8 PSU
- YL-D40BH12E 40mm Mini Fan for Bitmain APW8 / APW9 PSU
- W40S12BMF5-01 Nidec 40mm 4028 Fan for Bitmain APW9 PSU
- Bitmain APW8 10-11V PSU for Antminer S11 (Second-Hand)
Contact contact@lys-sz.com for volume pricing or compatibility questions. Worldwide shipping from our Shenzhen warehouses. DDP available for US and EU customers.
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