Bitdeer
SealMiner A3 Pro 660T
AvailableNew
- Hashrate
- 660TH/s
- Power
- 8,250W
- Efficiency
- 12.5J/TH
- Hydro-cooled
- SHA-256
$9,024.05$13.67/TH
Picture of the model. The unit you receive may differ in appearance.
Bitmain Antminer S21j XP Hyd. 495 TH/s Bitcoin Miner
The Antminer S21j XP Hyd. is a hydro-cooled Bitcoin miner from Bitmain, rated at 495 TH/s and 5,940 W (12 J/TH). It runs on 380–415 V three-phase power.
- Hashrate
- 495TH/s
- Power
- 5,940W
- Efficiency
- 12J/TH
- Cooling
- Hydro-cooled
- Coins
- BTC, BCH, BSV
- Input voltage
- 380–415 V
Retail price
$4,988.09
per unit · $10.08 per TH/s
- 1–4 units$4,988.09
- 5+ unitsVolume pricing available
View volume pricingVolume pricing
| 1–4 units | $4,988.09 |
|---|---|
| 5–19 units | Volume pricing on request |
| 20–99 units | Request Quote |
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
$4,988.09Free standard shipping. Excludes duties and taxes
- Manufacturer
- Bitmain
- Model
- S21j XP Hyd.
- Algorithm
- SHA-256
- Condition
- New
Product overview
The Antminer S21j XP Hyd. is a hydro-cooled Bitcoin miner from Bitmain, rated at 495 TH/s and 5,940 W (12 J/TH). It runs on 380–415 V three-phase power.
Condition: New.
495 TH/s
Rated hashrate
12 J/TH
Energy per terahash
Hydro-cooled
Cooling method
5,940 W
Power draw at the wall
Technical specifications
Specifications as published by the manufacturer · last verified October 1, 2026 · Bitmain documentation
Fields the manufacturer does not publish are left out rather than estimated.
Performance
| Hashrate | 495 TH/s (±3%) |
|---|---|
| Power consumption | 5,940 W (±5%) |
| Efficiency | 12 J/TH |
| Algorithm | SHA-256 |
| Supported coins | BTC, BCH, BSV |
Power & electrical
| Input voltage | 380–415 V AC |
|---|---|
| Electrical phase | Three-phase |
| Input frequency | 50-60 Hz |
| Maximum input current | 12 A |
Cooling
| Cooling type | Hydro-cooled |
|---|---|
| Coolant inlet temperature | 20–50 °C |
| Coolant flow | 8–10 L/min |
| Maximum coolant pressure | 3.5 bar |
| Coolant | Antifreeze/Pure water/Deionized water |
| Coolant pipe connection | OD10mm |
Physical & environment
| Dimensions (L × W × H) | 430 × 176 × 208 mm |
|---|---|
| Net weight | 16.2 kg |
| Packaged dimensions | 570 × 316 × 430 mm |
| Gross weight | 18.3 kg |
| Storage temperature | -20–70 °C |
| Operating humidity (non-condensing) | 10–90 % RH |
Connectivity
| Network interface | RJ45 Ethernet 10/100M |
|---|
General
| Manufacturer model number | 495T-10 |
|---|---|
| Manufacturer warranty | 365 days from the shipping date |
Mining economics
Estimate output and operating cost for the Antminer S21j XP Hyd. at your own power price. Results are calculations from the inputs shown, not a forecast.
Estimated results (per miner, at $0.06/kWh)
- Est. revenue / day
- $17.57
- 0.00021791 BTC mined / day
- Electricity cost / day
- $8.55
- 142.6 kWh × $0.06
- Operating result / day
- $9.02
- Revenue less electricity
- Revenue / 30 days
- $527.17
- Electricity / 30 days
- $256.61
- Operating result / 30 days
- $270.56
- Energy / day
- 142.6 kWh
- Energy / 30 days
- 4,277 kWh
- Break-even electricity
- $0.123/kWh
Estimates only. Not financial advice. Results vary with network difficulty, pool fees, uptime, market conditions, the Bitcoin price and the cost of electricity. They are calculated from the inputs shown at constant difficulty and price, and leave out the cost of the hardware, cooling, downtime, taxes and depreciation.
Network data as of 2026-10-28 13:00 UTC · price: mempool.space · difficulty: mempool.space · block reward 3.1391 BTC
Electricity cost by power price
Daily and 30-day electricity cost of Antminer S21j XP Hyd. at 5,940 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $4.28 | $128.30 | $17.57 | $13.30 |
| $0.05/kWh | $7.13 | $213.84 | $17.57 | $10.44 |
| $0.06/kWhselected | $8.55 | $256.61 | $17.57 | $9.02 |
| $0.07/kWh | $9.98 | $299.38 | $17.57 | $7.59 |
| $0.10/kWh | $14.26 | $427.68 | $17.57 | $3.32 |
| $0.12/kWh | $17.11 | $513.22 | $17.57 | $0.47 |
| $0.15/kWh | $21.38 | $641.52 | $17.57 | -$3.81 |
| $0.20/kWh | $28.51 | $855.36 | $17.57 | -$10.94 |
Compare miners
How the Antminer S21j XP Hyd. compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| Antminer S21j XP Hyd. (this miner) | 495 TH/s | 5,940 W | 12 J/TH | Hydro-cooled | $4,988.09 | $10.08 | |
| SealMiner A3 Pro 660T | 660 TH/s | 8,250 W | 12.5 J/TH | Hydro-cooled | $9,024.05 | $13.67 | Side by side |
| Whatsminer M73S 550T | 550 TH/s | 7,200 W | 13.1 J/TH | Hydro-cooled | $6,354.55 | $11.55 | Side by side |
| Whatsminer M7DS 696T | 696 TH/s | 9,200 W | 13.2 J/TH | Hydro-cooled | $7,219.05 | $10.37 | Side by side |
| Antminer S21 XP Hyd. | 473 TH/s | 5,676 W | 12 J/TH | Hydro-cooled | $5,889.05 | $12.45 | Side by side |
Shipping
Standard shipping is free to every destination we ship to. If you need it faster, choose express shipping at checkout and we quote it before you pay. Import duties, taxes and customs clearance are set by the destination country and are the importer's responsibility unless your quotation states otherwise.
- Package dimensions
- 570 × 316 × 430 mm
- Gross weight
- 18.3 kg
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
Antminer S21j XP Hyd. questions
How much electricity does the Antminer S21j XP Hyd. use?
The Antminer S21j XP Hyd. draws 5,940 W at the wall (±5%). Running continuously that is about 142.6 kWh per day and 4,277 kWh per 30 days. Multiply by your electricity price to get the running cost, or use the calculator.
What is the hashrate and efficiency of the Antminer S21j XP Hyd.?
Rated hashrate is 495 TH/s (±3%) at 12 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
What voltage does the Antminer S21j XP Hyd. need?
Input voltage is 380–415 V AC, three-phase at 50-60 Hz. It cannot run on a 110–120 V household circuit. Confirm your supply, breaker and cabling with a qualified electrician before ordering. See Bitcoin miner power requirements.
How is the Antminer S21j XP Hyd. cooled?
The Antminer S21j XP Hyd. is hydro-cooled: heat is removed by liquid circulating through cold plates, so it needs an external cooling loop (pump, heat exchanger or dry cooler) and cannot run on fans alone. Rated coolant flow is 8–10 L/min. Compare options in Air vs hydro Bitcoin miners.
Can I order the Antminer S21j XP Hyd. in bulk?
Yes. Orders are handled by quantity: small quantities through checkout when a price is published, and larger quantities by quotation with pricing, batch and logistics confirmed by sales. Request a wholesale quote.
Similar miners
The closest alternatives by cooling type and efficiency.
MicroBT
Whatsminer M73S 550T
AvailableNew- Hashrate
- 550TH/s
- Power
- 7,200W
- Efficiency
- 13.1J/TH
- Hydro-cooled
- SHA-256
$6,354.55$11.55/TH
MicroBT
Whatsminer M7DS 696T
AvailableNew- Hashrate
- 696TH/s
- Power
- 9,200W
- Efficiency
- 13.2J/TH
- Hydro-cooled
- SHA-256
$7,219.05$10.37/TH
Bitmain
Antminer S21 XP Hyd.
AvailableNew- Hashrate
- 473TH/s
- Power
- 5,676W
- Efficiency
- 12J/TH
- Hydro-cooled
- SHA-256
$5,889.05$12.45/TH
Wholesale & project supply
Need the Antminer S21j XP Hyd. in volume?
Send quantity, destination and required date. Sales replies with batch availability, unit pricing and freight options for your order size.
- 20+ units
- Mixed models
- Container orders
- Project procurement
Antminer S21j XP Hyd.
$4,988.09