
Picture of the model. The unit you receive may differ in appearance.
Antminer 140mm replacement fan
- Manufacturer
- Bitmain
140 mm, 12 V DC, 5 A replacement cooling fan rated 7000 RPM, with a 4-pin square connector, for the Antminer S21 Pro and S21 XP.
$18.05
Ships in 5–10 business days
Description
A 140 mm replacement cooling fan for Bitmain Antminer models built around the larger 140 mm fan size. It is used to replace a fan that is noisy, damaged, running slowly or no longer working. Depending on supply, the fan carries Martech or Nidec branding; both are rated for 7000 RPM. Similar-looking Antminer fans can differ in size, connector and electrical rating, so compare the original fan before fitting.
Compatibility
- Antminer S21 Pro
- Antminer S21 XP
- Not compatible: the standard Antminer S21, the S19 series (S19, S19 Pro, S19j Pro, S19k Pro) and older Antminer models that use other fan sizes
Specifications
- Fan size: 140 × 140 mm
- Input voltage: 12 V DC
- Rated current: 5 A
- Rated speed: 7000 RPM
- Connector: 4-pin, square
- Cable length: about 15 in
Notes
- Shut down and unplug the miner and let it cool before opening it.
- Fit the replacement in the same airflow direction as the original, route its cable through the faceplate, and check that the miner reports normal RPM afterwards.
More cooling fans

Wholesale & project supply
Building or expanding a mining operation?
Bulk ASIC procurement for mining farms, hosting companies, resellers and institutional operators. Send model, quantity and destination; sales replies with pricing and lead time.