Bitmain
Antminer S21 Pro 220T
AvailableNew
- Hashrate
- 220TH/s
- Power
- 3,300W
- Efficiency
- 15J/TH
- Air-cooled
- SHA-256
$1,804.05$8.2/TH
Picture of the model. The unit you receive may differ in appearance.
Bitdeer SEALMINER A2 Pro Air 255 TH/s Bitcoin Miner
The SEALMINER A2 Pro Air 255T is an air-cooled Bitcoin miner from Bitdeer, rated at 255 TH/s and 3,799.5 W (14.9 J/TH).
- Hashrate
- 255TH/s
- Power
- 3,799.5W
- Efficiency
- 14.9J/TH
- Cooling
- Air-cooled
- Coins
- BTC, BCH, BSV
Versions of this model
- 255 TH/s
- 260 TH/s
Retail price
$2,944.05
per unit · $11.55 per TH/s
- 1–4 units$2,944.05
- 5+ unitsVolume pricing available
View volume pricingVolume pricing
| 1–4 units | $2,944.05 |
|---|---|
| 5–19 units | Volume pricing on request |
| 20–99 units | Request Quote |
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
$2,944.05Free standard shipping. Excludes duties and taxes
- Manufacturer
- Bitdeer
- Model
- A2 Pro Air 255T
- Algorithm
- SHA-256
- Condition
- New
Product overview
The SEALMINER A2 Pro Air 255T is an air-cooled Bitcoin miner from Bitdeer, rated at 255 TH/s and 3,799.5 W (14.9 J/TH).
Condition: New.
255 TH/s
Rated hashrate
14.9 J/TH
Energy per terahash
Air-cooled
Cooling method
3,799.5 W
Power draw at the wall
Technical specifications
Specifications as published by the manufacturer · last verified October 1, 2026 · Bitdeer documentation
Fields the manufacturer does not publish are left out rather than estimated.
Performance
| Hashrate | 255 TH/s (±10%) |
|---|---|
| Power consumption | 3,799.5 W (±10%) |
| Efficiency | 14.9 J/TH |
| Algorithm | SHA-256 |
| Supported coins | BTC, BCH, BSV |
Cooling
| Cooling type | Air-cooled |
|---|
General
| Release date | March 17, 2025 |
|---|---|
| Manufacturer warranty | 365-day warranty starting from the shipment date |
Mining economics
Estimate output and operating cost for the SEALMINER A2 Pro Air 255T 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
- $9.05
- 0.00011226 BTC mined / day
- Electricity cost / day
- $5.47
- 91.2 kWh × $0.06
- Operating result / day
- $3.58
- Revenue less electricity
- Revenue / 30 days
- $271.57
- Electricity / 30 days
- $164.14
- Operating result / 30 days
- $107.43
- Energy / day
- 91.2 kWh
- Energy / 30 days
- 2,736 kWh
- Break-even electricity
- $0.099/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 SEALMINER A2 Pro Air 255T at 3,800 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $2.74 | $82.07 | $9.05 | $6.32 |
| $0.05/kWh | $4.56 | $136.78 | $9.05 | $4.49 |
| $0.06/kWhselected | $5.47 | $164.14 | $9.05 | $3.58 |
| $0.07/kWh | $6.38 | $191.49 | $9.05 | $2.67 |
| $0.10/kWh | $9.12 | $273.56 | $9.05 | -$0.07 |
| $0.12/kWh | $10.94 | $328.28 | $9.05 | -$1.89 |
| $0.15/kWh | $13.68 | $410.35 | $9.05 | -$4.63 |
| $0.20/kWh | $18.24 | $547.13 | $9.05 | -$9.19 |
Compare miners
How the SEALMINER A2 Pro Air 255T compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| SEALMINER A2 Pro Air 255T (this miner) | 255 TH/s | 3,799.5 W | 14.9 J/TH | Air-cooled | $2,944.05 | $11.55 | |
| Antminer S21 Pro 220T | 220 TH/s | 3,300 W | 15 J/TH | Air-cooled | $1,804.05 | $8.20 | Side by side |
| NerdQaxe++ 4.8T | 4.8 TH/s | 72 W | 15 J/TH | Air-cooled | $227.05 | $47.30 | Side by side |
| Whatsminer M72S 264T | 264 TH/s | 4,000 W | 15.2 J/TH | Air-cooled | $3,704.05 | $14.03 | Side by side |
| Antminer S21+ 235T | 235 TH/s | 3,564 W | 15.2 J/TH | Air-cooled | $1,614.05 | $6.87 | 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.
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
SEALMINER A2 Pro Air 255T questions
How much electricity does the SEALMINER A2 Pro Air 255T use?
The SEALMINER A2 Pro Air 255T draws 3,799.5 W at the wall (±10%). Running continuously that is about 91.2 kWh per day and 2,736 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 SEALMINER A2 Pro Air 255T?
Rated hashrate is 255 TH/s (±10%) at 14.9 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
How is the SEALMINER A2 Pro Air 255T cooled?
The SEALMINER A2 Pro Air 255T is air-cooled with built-in fans. It needs a steady supply of cool intake air and a path to exhaust hot air. Compare options in Air vs hydro Bitcoin miners.
Can I order the SEALMINER A2 Pro Air 255T 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.
NerdMiner
NerdQaxe++ 4.8T
AvailableNew- Hashrate
- 4.8TH/s
- Power
- 72W
- Efficiency
- 15J/TH
- Air-cooled
- SHA-256
$227.05$47.3/TH
MicroBT
Whatsminer M72S 264T
AvailableNew- Hashrate
- 264TH/s
- Power
- 4,000W
- Efficiency
- 15.2J/TH
- Air-cooled
- SHA-256
$3,704.05$14.03/TH
Bitmain
Antminer S21+ 235T
AvailableNew- Hashrate
- 235TH/s
- Power
- 3,564W
- Efficiency
- 15.2J/TH
- Air-cooled
- SHA-256
$1,614.05$6.87/TH
Wholesale & project supply
Need the SEALMINER A2 Pro Air 255T 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
SEALMINER A2 Pro Air 255T
$2,944.05