Delta PFM1412DE-SP02 140mm – Antminer S21XP / S21 Pro / S21+ Cooling Fan
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Delta PFM1412DE-SP02 140mm Cooling Fan | 12V 7.5A Replacement for Antminer S21XP / S21 Pro / S21+
The Delta PFM1412DE-SP02 is a high-performance 140mm DC brushless cooling fan designed for Antminer S21XP, S21 Pro, and S21+ miners. Used as a direct replacement for faulty or worn chassis fans on these high-power models — the failure mode that shows up after 12-18 months of continuous duty as bearing wear, dust buildup, or audible blade-strike.
Headline specs: 12V 7.5A operation, 7000 RPM maximum, 328 CFM airflow, 4-wire PWM control. Size: 140 × 140 × 38mm. Plug-and-play replacement — the 4-wire PWM connector matches the original Antminer S21-series fan harness exactly.
When to Replace the PFM1412DE-SP02
- Miner thermal throttling — fan can't sustain rated airflow under load.
- Audible bearing wear — grinding, ticking, or fluctuating speed.
- Fan-error reported in the miner log — controller can't read tach signal.
- Visible damage — broken blade, melted housing, or dust-clogged hub.
Delta PFM1412DE-SP02 Specifications
| Feature | Specification |
|---|---|
| Brand | Delta |
| Model | PFM1412DE-SP02 |
| Type | DC Brushless Fan |
| Size | 140 × 140 × 38mm |
| Voltage | 12V |
| Current | 7.5A |
| Maximum Speed | 7000 RPM |
| Airflow | 328 CFM |
| Control | 4-wire PWM |
| Compatible Miners | Antminer S21XP, S21 Pro, S21+ |
FAQ — PFM1412DE-SP02 140mm Fan
Q: How do I replace the fan safely?
A: Power off and unplug the miner. Open the miner chassis (standard top-cover screws). Disconnect the 4-pin fan PWM connector, unscrew the fan from the mounting frame, install the fresh PFM1412DE-SP02 with airflow direction matching the original (intake or exhaust side per the airflow arrow on the fan housing), reconnect, reassemble, power on.
Q: Will a generic 140×140×38mm 12V fan work?
A: Generic fans rarely match the 7000 RPM / 328 CFM rating. The S21 Pro / S21+ thermal design assumes this airflow — under-spec fans trip overtemperature. Stick with the original part number or a confirmed equivalent.
Q: How long do these fans typically last?
A: Under continuous mining duty in typical farm conditions, expect 12-24 months MTBF on the bearings. Dust accumulation accelerates wear — quarterly compressed-air cleaning extends life.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for volume pricing.
Related products
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- AUB0812VH 80mm PSU Cooling Fan
Mining farms stocking Antminer S21 Pro / S21+ replacement fans? 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).
