PSD1204PQBX-A Cooling Fan 40x28mm 12VDC 23.4CFM 19000RPM Dual ball bearing
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PSD1204PQBX-A 40×28mm DC Cooling Fan | 12VDC 19000 RPM Dual Ball Bearing High-Static-Pressure Axial Fan for ASIC Miner PSU and Control Board Cooling
The PSD1204PQBX-A is a compact 40 × 28mm DC brushless axial fan with dual ball bearings — sized for the demanding cooling requirements of ASIC miner power supplies and control boards. Direct replacement when an original PSU fan fails, develops bearing noise, or stalls. The dual ball bearing construction handles the sustained high-RPM operation that distinguishes PSU fans from low-RPM chassis fans — typical service life is significantly longer than sleeve-bearing equivalents under continuous duty.
Operates at 12VDC with 9W power draw and delivers 23.4 CFM airflow at 19000 RPM. The high static pressure profile pushes air through dense heat-sink fin packs found in switching PSU layouts — where lower-RPM chassis fans would stall against the back-pressure. Noise level is 59.9 dBA at full speed (consistent with the high-RPM PSU fan envelope).
When to Replace the PSD1204PQBX-A Fan
- PSU fan failure — original fan dead, seized, or making grinding bearing noise.
- PSU overheating shutdowns — fan running but airflow insufficient (typically dust-clogged or worn bearing).
- Audible bearing wear — grinding, ticking, or fluctuating speed sounds before complete failure.
- PSU service-life refresh — preventive fan replacement during a complete PSU rebuild on used units.
- 40mm chassis-fan position on a control board or PSU — standard footprint, drop-in replacement for any 40×28mm fan slot.
PSD1204PQBX-A Fan Specifications
| Feature | Specification |
|---|---|
| Part Number | PSD1204PQBX-A |
| Type | DC brushless axial fan |
| Form Factor | 40 × 28 mm |
| Operating Voltage | 12 VDC |
| Power | 9 W |
| Speed | 19000 RPM |
| Airflow | 23.4 CFM |
| Noise Level | 59.9 dBA |
| Bearing Type | Dual ball bearing |
| Static Pressure Profile | High static pressure (designed for dense heat-sink stacks) |
| Typical Use | ASIC miner PSU + control board cooling |
FAQ — PSD1204PQBX-A Fan
Q: Why dual ball bearing instead of sleeve or hydraulic?
A: Ball bearings handle sustained high-RPM operation better than sleeve bearings — important at 19000 RPM continuous duty. Hydraulic bearings are quieter but typically rated for lower RPM. The dual-ball-bearing design gives the right trade-off for PSU fan service life.
Q: Can I substitute a different 40×28mm fan if this part is out of stock?
A: Any 40×28mm 12VDC fan with equivalent airflow (~23 CFM) and bearing type (ball bearing for high-RPM duty) will physically fit. Verify the connector pinout matches before substituting — different vendors use different tach polarity which can confuse the PSU controller.
Q: Is the noise level a concern for office or residential mining?
A: 59.9 dBA is typical for high-RPM PSU fans — it's audible but not the dominant noise source on a miner (the chassis fans usually exceed 80 dBA). For noise-sensitive deployments, the chassis fans are the bigger lever.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Carton-quantity pricing available.
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Repair shops stocking PSD1204 fans by the carton? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
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).
