Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner
The Bitmain Bitcoin & Bitcoin Cash ASIC Miner with 395TH hashrate, 5925W power draw and 15W/TH efficiency.
For SHA-256 mining, Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner brings together 395TH/s, 15W/TH efficiency, 5925W power draw, and a current price of £2970.00. It deserves close review from customers comparing stronger mining hardware.
🚀 The Bitmain Antminer S21+ Hydro 395Th is an ASIC miner built for the SHA-256 algorithm, optimised specifically for mining . Developed by Bitmain, this miner is part of the acclaimed Antminer S Series, released in 2025.
⚙️ Key Specifications:
395THHashrate
SHA-256Algorithm
15W/THEfficiency
5925WPower Draw
HydroCooling💰 Mining Compatibility: The Antminer S21+ Hydro was built with native support for mining on the SHA-256 algorithm. You can mine coins like Bitcoin, Bitcoin Cash, Bitcoin SV, eCash, DigiByte, Namecoin, Syscoin, Elastos, Peercoin, Fractal Bitcoin and Hathor, or earn Bitcoin on NiceHash.
🌡️ The Antminer S21+ features Hydro cooling technology where additional cooling equipment is required. Contact us for details on suitable cooling solutions for this miner
Today's Live Price:
£2,970.00
excl. VAT · UK delivery & import duties included
Market-linked pricing — your price is locked when you order
Market-linked pricing — your price is locked when you order
Full Details & Specifications
About the Bitmain Antminer S21+ Hydro 395Th ASIC Miner
What is the Bitmain Antminer S21+ Hydro 395Th ASIC miner for Bitcoin & Bitcoin Cash (SHA-256 mining)?
The Bitmain Antminer S21+ Hydro 395Th is an ASIC Miner built for the SHA-256 algorithm and optimised to mine Bitcoin & Bitcoin Cash. It delivers a hash rate of 395TH at an efficiency of 15W/TH, drawing 5925W at 410V (8.43A). Built by Bitmain as part of the Bitmain Antminer S Series and released in February 2025, it connects via Wired Ethernet and uses Hydro Cooling Technology.Bitmain Antminer S21+ Hydro 395Th Key Features at a Glance:
Bitmain Antminer S21+ Hydro 395Th Overall Summary
Taken as a whole, Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner combines 395TH/s, 15W/TH efficiency, 5925W power draw, and a current price of £2970.00. Customers have a clear reason to study the machine in more detail.Is the Bitmain Antminer S21+ Hydro 395Th the Right Miner for You?
Book a free consultation and we'll help you decide. Whether you're buying your first ASIC or scaling a farm, our team of seasoned miners will match you with the right machine, power plan and hosting for your goals.
Arrange a Call With One of Our Experts⚠️ Mining & Market Risk Disclaimer: Information about the Bitmain Antminer S21+ Hydro 395Th (also referred to as Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner) is provided for product comparison and operating guidance only. Mining outcomes can vary materially due to coin prices, network difficulty, block rewards, fees, electricity rates, uptime, and regulatory changes. If you understand the costs and operating requirements, the Bitmain Antminer S21+ Hydro 395Th can be a strong hardware choice when matched to the right power and hosting plan. Past performance is not indicative of future results. Always do your own research and seek independent professional advice from multiple sources before purchasing or operating mining hardware.
Product Specifications
Product Overview |
|
|---|---|
| Miner Type | ASIC Miner |
| Condition | New |
| Stock Availability | In stock |
| Product Type | Cryptocurrency Miner |
| Manufacturer | Bitmain |
| Model | Antminer S21 |
| Series | Antminer S Series |
| Family | Bitmain S21 Family |
| Also Known As | Antminer S21 Hydro, Bitcoin ASIC Miner, Bitmain Antminer S21+ Hydro 395Th, Bitmain Bitcoin & Bitcoin Cash Miner |
| Release Date | February 2025 |
| Release Year | 2025 |
Mining Performance |
|
| Algorithm | SHA-256 |
| Hashrate | 395TH |
| Raw Hashrate | 395000000000000H |
| Efficiency | 15W/TH |
| Power Consumption (W) | 5925W |
Electrical Requirements |
|
| Voltage (V) | 410V |
| Nominal Voltage | 380V – 415V |
| Phase Requirement | Three Phase |
| Input Frequency | 50/60 Hz |
| Rated Current (A) | 25.3A per phase @ 410V |
| Recommended Breaker Rating | 13A |
Cooling & Airflow |
|
| Cooling Method | Hydro |
| Number of Fans | 0, External Cooling Equipment Required: Fan Count Depends on the External Cooling Setup. |
Heat Output & Cooling Load |
|
| Heat Output (kW) | 5.93kW |
| BTU Per Hour | 20,216 BTU/h |
| BTU Range | 18,194 – 23,249 BTU/h |
| Cooling Tons | 1.68 ton |
| Cooling Tons Range | 1.52 – 1.94 ton |
Operating Environment |
|
| Operating Temperature Range | 5 – 45 °C, 41 – 113 °F |
| Operating Humidity | 5 – 95 % |
| Noise Level Range | 0dB, External Cooling Equipment Required: Check Pump/Radiator/Chiller Noise Level. |
| Running Temperature | 43 °C, 109 °F |
| Running Temperature Range | 41 – 45 °C, 106 – 114 °F |
ASIC Chip Architecture |
|
| Generation | 10th Generation SHA-256 Miner |
| ASIC Chip Family | BM136x Family |
| ASIC Chip | BM1368 |
| ASIC Chip Process (nm) | 5nm |
| ASIC Chip Era | Advanced 5nm (Gen 10) |
| ASIC Chip Date Range | October 2023 – Present |
Mining Compatibility |
|
| Primary Mineable Coin | Bitcoin (BTC) |
| Primary Mineable Assets | Bitcoin & Bitcoin Cash |
| Mining Mode Compatibility | Pool Mining, Solo Mining |
| Mineable Coins | Acoin (ACOIN), Bitcoin (BTC), Bitcoin Vault (BTCV2), BitcoinCash (BCH), BitcoinSV (BSV), Curecoin (CURE), DigiByte (DGB), eCash (XEC), Elastos (ELA), eMark (DEM), Fractal Bitcoin (FB), Hathor (HTR), Joulecoin (XJO), Namecoin (NMC), Nicehash (BTC), Peercoin (PPC), Quai-Scrypt (QUAI), Terracoin (TRC), Unbreakable (UNB) |
Network Connectivity |
|
| Network Interface | RJ45 Ethernet 10/100M |
Physical Specifications |
|
| Dimensions | 41 × 17 × 20.9 cm |
| Weight | 12.3 kg |
Warranty, Support & Delivery |
|
| Warranty | 12 Month – Manufacturer + MiningShop Care |
| Support | Expert Mining Support Included |
| Delivery | DDP – UK/EU Warehouse – Duties & Taxes included. |
Product Highlights |
|
| Highlights | 💧 Hydro Ready, 3️⃣ Three Phase Miners |
Earnings By Asset
What This Miner Earns Across Every Asset
Compare estimated pool earnings, solo-mining probability, and pool-versus-solo outcomes for this exact machine.
Pool mining earnings for Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner
| Mineable Asset | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Bitcoin (BTC)£54,864.50▼ 0.61% |
HourEarnings:£0.45Rewards:0.00000823 BTC | DayEarnings:£10.84Rewards:0.00019750 BTC | WeekEarnings:£75.85Rewards:0.00138250 BTC | MonthEarnings:£329.81Rewards:0.00601141 BTC | 3 MonthEarnings:£989.44Rewards:0.01803422 BTC | 6 MonthEarnings:£1,978.88Rewards:0.03606844 BTC | YearEarnings:£3,957.75Rewards:0.07213688 BTC | Year 2Earnings:£7,915.51Rewards:0.14427375 BTC | ROI: |
 BitcoinCash (BCH)£202.79▼ 1.29% |
HourEarnings:£0.44Rewards:0.00217744 BCH | DayEarnings:£10.60Rewards:0.05225850 BCH | WeekEarnings:£74.18Rewards:0.36580950 BCH | MonthEarnings:£322.56Rewards:1.5906 BCH | 3 MonthEarnings:£967.68Rewards:4.7719 BCH | 6 MonthEarnings:£1,935.35Rewards:9.5437 BCH | YearEarnings:£3,870.71Rewards:19.0874 BCH | Year 2Earnings:£7,741.41Rewards:38.1748 BCH | ROI: |
Solo mining earnings for Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner
| Mineable Asset | Day | Month | 3 Month | 6 Month | Year | Year 2 | ROI |
|---|---|---|---|---|---|---|---|
|
Bitcoin (BTC)£56,349.20▼ 0.61% |
DayChance:0.01%Odds:1 in 16,044Expected Blocks:0.00006233Expected Rewards:0.00019635 BTCExpected Earnings:£11.06Expected Profit:£11.06Extreme Risk | MonthChance:0.19%Odds:1 in 528Expected Blocks:0.001897Expected Rewards:0.00597625 BTCExpected Earnings:£336.76Expected Profit:£336.76Very High Risk | 3 MonthChance:0.57%Odds:1 in 176Expected Blocks:0.005692Expected Rewards:0.01792876 BTCExpected Earnings:£1,010.27Expected Profit:£1,010.27Very High Risk | 6 MonthChance:1.13%Odds:1 in 88Expected Blocks:0.0114Expected Rewards:0.03585751 BTCExpected Earnings:£2,020.54Expected Profit:£2,020.54High Risk | YearChance:2.25%Odds:1 in 44Expected Blocks:0.0228Expected Rewards:0.07171503 BTCExpected Earnings:£4,041.08Expected Profit:£4,041.08High Risk | Year 2Chance:4.45%Odds:1 in 22Expected Blocks:0.0455Expected Rewards:0.14343006 BTCExpected Earnings:£8,082.17Expected Profit:£8,082.17High Risk | ROI:268 Days% ROI:136% |
|
BitcoinCash (BCH)£202.83▼ 1.29% |
DayChance:1.63%Odds:1 in 61Expected Blocks:0.0164Expected Rewards:0.05144078 BCHExpected Earnings:£10.43Expected Profit:£10.43High Risk | MonthChance:39.4%Odds:1 in 2.5Expected Blocks:0.5002Expected Rewards:1.5657 BCHExpected Earnings:£317.58Expected Profit:£317.58Moderate Risk | 3 MonthChance:77.7%Odds:1 in 1.29Expected Blocks:1.5Expected Rewards:4.6972 BCHExpected Earnings:£952.74Expected Profit:£952.74Low Risk | 6 MonthChance:95.0%Odds:1 in 1.05Expected Blocks:3Expected Rewards:9.3944 BCHExpected Earnings:£1,905.48Expected Profit:£1,905.48Very Low Risk | YearChance:99.8%Odds:1 in 1Expected Blocks:6Expected Rewards:18.7887 BCHExpected Earnings:£3,810.96Expected Profit:£3,810.96Very Low Risk | Year 2Chance:100%Odds:1 in 1Expected Blocks:12.01Expected Rewards:37.5775 BCHExpected Earnings:£7,621.93Expected Profit:£7,621.93Very Low Risk | ROI:285 Days% ROI:128% |
Solo versus pool mining earnings for Bitmain Antminer S21+ Hydro 395Th SHA-256 Bitcoin Miner
| Mineable Asset | Mode | Day | Month | 3 Month | 6 Month | Year | Year 2 | ROI |
|---|---|---|---|---|---|---|---|---|
|
Bitcoin (BTC)£56,349.20▼ 0.61% |
Solo | DaySolo WinsChance:0.01%Odds:1 in 16,044Expected Blocks:0.00006233Expected Rewards:0.00019635 BTCExpected Earnings:£11.06Expected Profit:£11.06Extreme Risk | MonthSolo WinsChance:0.19%Odds:1 in 528Expected Blocks:0.001897Expected Rewards:0.00597625 BTCExpected Earnings:£336.76Expected Profit:£336.76Very High Risk | 3 MonthSolo WinsChance:0.57%Odds:1 in 176Expected Blocks:0.005692Expected Rewards:0.01792876 BTCExpected Earnings:£1,010.27Expected Profit:£1,010.27Very High Risk | 6 MonthSolo WinsChance:1.13%Odds:1 in 88Expected Blocks:0.0114Expected Rewards:0.03585751 BTCExpected Earnings:£2,020.54Expected Profit:£2,020.54High Risk | YearSolo WinsChance:2.25%Odds:1 in 44Expected Blocks:0.0228Expected Rewards:0.07171503 BTCExpected Earnings:£4,041.08Expected Profit:£4,041.08High Risk | Year 2Solo WinsChance:4.45%Odds:1 in 22Expected Blocks:0.0455Expected Rewards:0.14343006 BTCExpected Earnings:£8,082.17Expected Profit:£8,082.17High Risk | ROI:268 Days% ROI:136% |
| Pool | DayEarnings:£10.84Rewards:0.00019750 BTCProfit:£10.84 | MonthEarnings:£329.81Rewards:0.00601141 BTCProfit:£329.81 | 3 MonthEarnings:£989.44Rewards:0.01803422 BTCProfit:£989.44 | 6 MonthEarnings:£1,978.88Rewards:0.03606844 BTCProfit:£1,978.88 | YearEarnings:£3,957.75Rewards:0.07213688 BTCProfit:£3,957.75 | Year 2Earnings:£7,915.51Rewards:0.14427375 BTCProfit:£7,915.51 | Pool ROIROI:274 Days% ROI:133% | |
|
BitcoinCash (BCH)£202.83▼ 1.29% |
Solo | DayChance:1.63%Odds:1 in 61Expected Blocks:0.0164Expected Rewards:0.05144078 BCHExpected Earnings:£10.43Expected Profit:£10.43High Risk | MonthChance:39.4%Odds:1 in 2.5Expected Blocks:0.5002Expected Rewards:1.5657 BCHExpected Earnings:£317.58Expected Profit:£317.58Moderate Risk | 3 MonthChance:77.7%Odds:1 in 1.29Expected Blocks:1.5Expected Rewards:4.6972 BCHExpected Earnings:£952.74Expected Profit:£952.74Low Risk | 6 MonthChance:95.0%Odds:1 in 1.05Expected Blocks:3Expected Rewards:9.3944 BCHExpected Earnings:£1,905.48Expected Profit:£1,905.48Very Low Risk | YearChance:99.8%Odds:1 in 1Expected Blocks:6Expected Rewards:18.7887 BCHExpected Earnings:£3,810.96Expected Profit:£3,810.96Very Low Risk | Year 2Chance:100%Odds:1 in 1Expected Blocks:12.01Expected Rewards:37.5775 BCHExpected Earnings:£7,621.93Expected Profit:£7,621.93Very Low Risk | ROI:285 Days% ROI:128% |
| Pool | DayPool WinsEarnings:£10.60Rewards:0.05225850 BCHProfit:£10.60 | MonthPool WinsEarnings:£322.56Rewards:1.5906 BCHProfit:£322.56 | 3 MonthPool WinsEarnings:£967.68Rewards:4.7719 BCHProfit:£967.68 | 6 MonthPool WinsEarnings:£1,935.35Rewards:9.5437 BCHProfit:£1,935.35 | YearPool WinsEarnings:£3,870.71Rewards:19.0874 BCHProfit:£3,870.71 | Year 2Pool WinsEarnings:£7,741.41Rewards:38.1748 BCHProfit:£7,741.41 | Pool ROIROI:280 Days% ROI:130% |
Full Product Specifications
Every verified specification for this machine — performance, electrical, cooling, chip architecture and compatibility.
RATED BY REAL MINERS
What UK Miners Say About Us
Every review below is public, named and independently hosted.
"Darren was incredibly knowledgeable and patient… He explained the pros and cons clearly and tailored his advice to my specific needs rather than pushing a generic solution… What really sets Darren and the team apart, though, is the after-sales support. They have remained responsive, helpful, and proactive even after the sale was completed… An outstanding experience from start to finish."
"It’s rare to find a genuinely trustworthy company in the mining industry, but my experience here has been excellent… Their after-sales support has also been outstanding. Highly recommended."
"The Mining Shop UK truly are amazing, Darren always goes above and beyond making sure every question (no matter how small and silly) is answered… has really helped my business grow."
"Incredibly knowledgeable and gave me some really valuable information without any pressure. If you’re looking for people in the mining space who actually know what they’re talking about, these are your guys."
"The support and service they supplied me was amazing… I would definitely recommend them and I personally will be purchasing my next miner from them."
"They gave me the good advice on how to best repair my device and keep costs low. Honest and really polite. Definitely recommend. You are in good hands with them."
Why The Mining Shop
Why Buy Your ASIC Miner from The Mining Shop UK Ltd?
10
Reasons Customers Choose Us for ASIC Miners
100% UK-based – registered company with office & repair lab in Hartlepool, North-East England.
Mining since 2011 – 15+ years of trust with hobbyists and international farms.
Fully tested before dispatch – every unit’s PSU & hash-boards are bench-tested in our Hartlepool lab.
12-month no-quibble warranty – extendable to 24 months – better cover than most manufacturers.
Hosting on six continents – electricity from £0.04/kWh if you need cheaper power.
In-house board-level repairs – same-week turnaround on most RMA cases.
Real humans, 7 days a week – friendly UK staff on phone and email whenever you need us.
Free consultations – earnings, ROI & power-cost advice for new and seasoned miners alike.
Plug-and-play setup help – we walk you through wallets and pool configs so you’re hashing on day one.
Buy-back & upgrade programme – trade in older units as you scale.
Your Edge Starts Before You Plug It In
From our Hartlepool test bench to your first hash — seasoned engineers, rapid warranty cover, and global hosting that slashes your power bill. Real support that doesn’t disappear after checkout.
Hosting for the Miner
Electricity from £0.04/kWh across six continents — see which of our hosting sites support this miner.
YOUR MINER, OUR EXPERTISE
How to Order Your Antminer S21+ Hydro
From quote to ongoing support in six simple steps.
1
Request Quote
Tell us what you need and get a fast quote.
2
Volume Pricing
Tiered discounts on multi-unit and bulk orders.
3
Confirm Order
Approve your quote and receive your invoice.
4
Insured Shipping
Fully insured delivery, tracked door to door.
5
Setup or Collection
Delivered and set up, or collect in the UK.
6
Ongoing Support
UK experts on hand for the life of your miner.
Verified Hardware
Fully tested & quality checked.
Secure Payments
Safe, encrypted transactions.
UK Based
Local support and fast response.
ASIC Miner FAQ
Antminer S21+ Hydro Questions & Answers
Frequently Asked Questions
Straight answers to what buyers ask most before ordering this miner — live profitability and ROI, power and cooling, payment and delivery, hosting and warranty. If anything is unclear, our team is one message away.
Key specs and live earnings for this exact machine — pulled straight from our live product data.
The Antminer S21+ Hydro is a Bitmain Bitcoin & Bitcoin Cash miner built on the SHA-256 algorithm. It delivers 395TH of hashrate at 5925W with an efficiency of 15W/TH, using Hydro cooling.
Every unit is supplied brand new through The Mining Shop UK — inspected, tested and quality checked before dispatch.
Our live data currently estimates around £376.12 per month on a 24-hour average for the Antminer S21+ Hydro, with an estimated ROI of about 240 days at today's prices and network difficulty.
Real earnings move with coin price, difficulty and your electricity or hosting rate — treat every figure as an estimate, never a guarantee.
The Antminer S21+ Hydro mines Bitcoin & Bitcoin Cash and other cryptocurrencies that use the SHA-256 algorithm, so you can point it at whichever supported coin or pool suits your strategy.
ASIC miners are algorithm-specific, so it cannot switch to coins on other algorithms — if you want a different coin, browse the full range or ask our team what fits.
How payment, dispatch and duties-included UK delivery work when you order.
We accept UK bank transfer and selected stablecoin payments such as USDT or USDC. We do not take cash, and card payments are generally not accepted on high-value hardware.
For your security we never change bank details by email — if anything looks unusual, stop and call us before sending funds.
In-stock machines are dispatched within 24–48 business hours of cleared payment, and UK delivery typically takes 2–5 business days on a tracked service.
We can also ship straight to a hosting facility, or arrange collection by appointment once funds have cleared.
Yes — on direct orders the price you see is the price you pay. Delivery, import duties and applicable taxes are handled by us.
That means no surprise courier invoices or customs paperwork after checkout.
Running this miner at home, pool setup before dispatch, and what hosting looks like in practice.
Check your power, heat and noise first: the Antminer S21+ Hydro draws 5925W and uses Hydro cooling, so it may need a dedicated circuit and proper ventilation rather than a standard socket.
If home is not practical, hosting gives you the same machine on wholesale power with heat and noise handled for you.
Yes. Send us your pool and worker details and we test your miner on your own pool before it ships — you can watch it hashing on your pool dashboard before it even arrives.
We never need your pool passwords, and every order includes a welcome pack covering the practical steps.
Yes. You own the miner, we run it in a specialist facility with 96–99% uptime targets, and rewards go straight from the pool to your own wallet — we never hold your coins.
Hosting is typically a 12-month term with the first month paid upfront — see how hosting works, or ask about Mine Before It Arrives (£40 + VAT) to start earning while your Antminer S21+ Hydro is still in transit.
The cover, repairs and UK support behind every machine we sell.
A 12-month manufacturer warranty as standard. We log serial numbers, photograph key components and keep your test reports on file, which makes any claim far smoother.
Overclocking, unauthorised firmware, unsuitable power supplies or third-party dismantling voids cover — talk to us before modifying anything.
Yes — diagnostics and repairs are in-house services covering hashboards, PSUs, fans and firmware, with a £150 + VAT diagnosis fee deducted from your final invoice if we complete the repair.
Repair customers get a dashboard showing progress, photos and inspection records.
We have mined since 2011 and sell only brand-new, genuine hardware — every machine is inspected, serial-logged and test-run on your own pool before dispatch.
Sales, hosting, repairs and honest advice under one roof — talk to the team before you order and you will never buy blind.
Need Help Choosing a Miner?
Not sure this is the right machine for your budget, power rate or setup? Tell us what you are working with.
Our team has mined since 2011 — you will get straight answers on profitability, hosting and the best-fit hardware before you spend a penny.
Our team has mined since 2011 — you will get straight answers on profitability, hosting and the best-fit hardware before you spend a penny.