MicroBT
WhatsMiner M66S 286T
AvailableNew
- Hashrate
- 286TH/s
- Power
- 5,291W
- Efficiency
- 18.5J/TH
- Immersion
- SHA-256
$2,445.30$8.55/TH
Picture of the model. The unit you receive may differ in appearance.
Bitmain Antminer S21 Imm. 301 TH/s Bitcoin Miner
The Antminer S21 Imm. HEM 301T is an immersion Bitcoin miner from Bitmain, rated at 301 TH/s and 5,569 W (18.5 J/TH). It runs on 380–415 V three-phase power.
- Hashrate
- 301TH/s
- Power
- 5,569W
- Efficiency
- 18.5J/TH
- Cooling
- Immersion
- Coins
- BTC, BCH, BSV
- Input voltage
- 380–415 V
Versions of this model
- 301 TH/s
- 215 TH/s
Retail price
Price on request
Sales quotes per batch and quantity.
View volume pricingVolume pricing
| 20–99 units | Request Quote |
|---|---|
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
- Manufacturer
- Bitmain
- Model
- S21 Imm. HEM 301T
- Algorithm
- SHA-256
- Condition
- New
Product overview
The Antminer S21 Imm. HEM 301T is an immersion Bitcoin miner from Bitmain, rated at 301 TH/s and 5,569 W (18.5 J/TH). It runs on 380–415 V three-phase power.
Condition: New.
301 TH/s
Rated hashrate
18.5 J/TH
Energy per terahash
Immersion
Cooling method
5,569 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 | 301 TH/s (±3%) |
|---|---|
| Power consumption | 5,569 W (±5%) |
| Efficiency | 18.5 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 | Immersion |
|---|---|
| Immersion compatible | Yes |
| Coolant inlet temperature | 30–55 °C |
| Coolant flow | 16.67 L/min |
Physical & environment
| Dimensions (L × W × H) | 293 × 236 × 364 mm |
|---|---|
| Net weight | 17.15 kg |
| Packaged dimensions | 600 × 390 × 450 mm |
| Gross weight | 20.45 kg |
| Storage temperature | -20–70 °C |
| Maximum altitude | 2,000 m |
Connectivity
| Network interface | RJ45 Ethernet 10/100M |
|---|
General
| Manufacturer warranty | 365 days from the shipping date |
|---|
Mining economics
Estimate output and operating cost for the Antminer S21 Imm. HEM 301T 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
- $10.69
- 0.00013251 BTC mined / day
- Electricity cost / day
- $8.02
- 133.7 kWh × $0.06
- Operating result / day
- $2.67
- Revenue less electricity
- Revenue / 30 days
- $320.56
- Electricity / 30 days
- $240.58
- Operating result / 30 days
- $79.98
- Energy / day
- 133.7 kWh
- Energy / 30 days
- 4,010 kWh
- Break-even electricity
- $0.080/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 S21 Imm. HEM 301T at 5,569 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $4.01 | $120.29 | $10.69 | $6.68 |
| $0.05/kWh | $6.68 | $200.48 | $10.69 | $4.00 |
| $0.06/kWhselected | $8.02 | $240.58 | $10.69 | $2.67 |
| $0.07/kWh | $9.36 | $280.68 | $10.69 | $1.33 |
| $0.10/kWh | $13.37 | $400.97 | $10.69 | -$2.68 |
| $0.12/kWh | $16.04 | $481.16 | $10.69 | -$5.35 |
| $0.15/kWh | $20.05 | $601.45 | $10.69 | -$9.36 |
| $0.20/kWh | $26.73 | $801.94 | $10.69 | -$16.05 |
Compare miners
How the Antminer S21 Imm. HEM 301T compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| Antminer S21 Imm. HEM 301T (this miner) | 301 TH/s | 5,569 W | 18.5 J/TH | Immersion | On request | — | |
| WhatsMiner M66S 286T | 286 TH/s | 5,291 W | 18.5 J/TH | Immersion | $2,445.30 | $8.55 | Side by side |
| Avalon A1566I 273T | 273 TH/s | 4,959 W | 18.2 J/TH | Immersion | $1,607.97 | $5.89 | Side by side |
| Avalon A1566I 249T | 249 TH/s | 4,500 W | 19 J/TH | Immersion | $1,994.05 | $8.01 | Side by side |
| WhatsMiner M66 276T | 276 TH/s | 5,492.4 W | 19.9 J/TH | Immersion | $2,097.60 | $7.60 | 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
- 600 × 390 × 450 mm
- Gross weight
- 20.45 kg
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
Antminer S21 Imm. HEM 301T questions
How much electricity does the Antminer S21 Imm. HEM 301T use?
The Antminer S21 Imm. HEM 301T draws 5,569 W at the wall (±5%). Running continuously that is about 133.7 kWh per day and 4,010 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 S21 Imm. HEM 301T?
Rated hashrate is 301 TH/s (±3%) at 18.5 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
What voltage does the Antminer S21 Imm. HEM 301T 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 S21 Imm. HEM 301T cooled?
The Antminer S21 Imm. HEM 301T is built for immersion cooling: it runs submerged in dielectric fluid inside a tank and has no fans. Compare options in Air vs hydro Bitcoin miners.
Can I order the Antminer S21 Imm. HEM 301T 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.
Canaan
Avalon A1566I 273T
AvailableNew- Hashrate
- 273TH/s
- Power
- 4,959W
- Efficiency
- 18.2J/TH
- Immersion
- SHA-256
$1,607.97$5.89/TH
Canaan
Avalon A1566I 249T
AvailableNew- Hashrate
- 249TH/s
- Power
- 4,500W
- Efficiency
- 19J/TH
- Immersion
- SHA-256
$1,994.05$8.01/TH
MicroBT
WhatsMiner M66 276T
AvailableNew- Hashrate
- 276TH/s
- Power
- 5,492.4W
- Efficiency
- 19.9J/TH
- Immersion
- SHA-256
$2,097.60$7.6/TH
Wholesale & project supply
Need the Antminer S21 Imm. HEM 301T 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 S21 Imm. HEM 301T
Price on request