Bitmain Antminer S21j XP Hyd (495Th/s)
Hydro cooling
Description
The Bitmain Antminer S21j XP Hyd provides 495 Th/s at 5940W for Bitcoin mining. Hydro cooling and a 410×170×209 mm body keep it compact and quiet at 50 dB. March 2026 release makes it a modern choice for liquid-cooled farms.
Specifications
| Manufacturer | Bitmain |
| Model | Antminer S21j XP Hyd (495Th) |
| Also known as | Antminer S21e XP Hyd (495Th) |
| Release | Mar 2026 |
| Size | 410 x 170 x 209mm |
| Noise level | 50dB |
| Cooling | Hydro-cooling |
| Power | 5940W |
| Interface | Ethernet |
| Temperature | 5 - 45 °C |
| Humidity | 5 - 95 % |
Profitability
| Daily | Monthly | Yearly | |
|---|---|---|---|
| Income | $19.68 0.000252 BTC |
$590.31 0.007550 BTC |
$7,182.15 0.091857 BTC |
| Electricity | -$7.13 | -$213.84 | -$2,601.72 |
| Profit | $12.55 | $376.47 | $4,580.43 |
Based on $0.05/kWh. Data refreshes every 24h.
ROI (Return on Investment) = miner price ÷ earnings.
Green = without electricity cost.
Red = after deducting electricity.
Frequently Asked Questions
Customer Reviews
Incredible efficiency. The J/Th ratio on this unit is unbeatable at this price point. My electricity bill actually went down after upgrading from older hardware.
Good purchase decision. I did extensive research and this model consistently came out on top in community benchmarks. The real-world results match.
Stable and consistent. No crashes or unexpected reboots. The web interface could be better but the hardware itself is solid.
Great upgrade from my old S9. The efficiency improvement alone was worth the switch. Running cool and quiet compared to what I'm used to.
Rock solid miner. Zero issues since day one. The firmware is stable and the pool connection never drops. Exactly what you want in mining hardware.
Good miner with a few quirks. The control board occasionally needs a reboot but it's rare enough not to be a dealbreaker. Performance is solid.
NOTE
- Incorrect input voltage can cause damage to the miner.
- Use two AC input wires, each with a 16-amp rating.
- Operation is recommended at altitudes below 2000 meters.
Purchasing Guidelines
- The listed retail price does not include customs duties or applicable taxes.
- Orders cannot be canceled or refunded once submitted.
- Product images are for reference purposes only; the actual shipped product will prevail.
Shipping Details
- Products will be shipped from China.
- Fully paid orders will be processed on a first-come, first-served basis.
- Customers bear responsibility for customs delays or issues.
Warranty
- 180-day warranty period starts from the shipping date.
- Valid only for the original purchaser.
- We are not responsible for damages due to non-compliance with instructions.
