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$13,500.00
| Function | BTC/BCH/BSV SHA256 Hydro-cooling Miner |
| Specifications | 860T 11180W 13J/T |
Looking to scale your Bitcoin mining operation? We have an exceptional opportunity for serious miners: Bitmain Antminer U3S21EXPH miners available for purchase. This powerful liquid-cooled SHA-256 miner delivers an impressive hashrate of 860 TH/s per unit, making it one of the most advanced options for mining Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV).
The U3S21EXPH, also known as the Antminer S21e XP Hydro, represents a significant advancement in Bitcoin mining technology. It is the first ASIC miner mass-commercialized by Bitmain with direct liquid-to-chip (DLC) cooling within a U form factor. This innovation bridges critical engineering gaps between Bitcoin mining and AI data center infrastructure, making it rack-ready like traditional data center hardware.
The Bitmain Antminer U3S21EXPH is a next-generation liquid-cooled SHA-256 miner designed for industrial-scale Bitcoin mining operations. Announced in September 2024 with initial shipping beginning in January 2025, this model was developed through an extensive partnership between Bitmain and Hut 8 Corp.
Hut 8 plans to deploy up to 17,280 U3S21EXPH servers at its Vega data center, which spans 162,000 square feet with a nominal energy capacity of 205 megawatts. At full capacity, this represents approximately 15 EH/s of Bitcoin mining power—about 2% of the current global Bitcoin network hash rate.
| Specification | Detail |
|---|---|
| Manufacturer | Bitmain |
| Model | Antminer U3S21EXPH (S21e XP Hydro) |
| Sub | 860T |
| Version | 10 |
| Algorithm | SHA256 (BTC/BCH/BSV) |
| Hashrate | 860 TH/s ±3% |
| Power Consumption | 11,180W ±5% |
| Efficiency | 13.0 J/TH |
| Cooling | Direct Liquid-to-Chip (DLC) Hydro |
| Noise Level | 50 dB (chassis only; external cooling adds additional signature) |
| Rack Format | 3U |
| Dimensions (w/o package) | 900 x 482.6 x 130mm |
| Net Weight | 42.7 kg |
| Gross Weight | 48.6 kg |
| Interface | RJ45 Ethernet 10/100M |
| Specification | Value |
|---|---|
| Phase | 3-Phase |
| Input Voltage | 380–415V |
| Input Frequency | 50–60 Hz |
| Input Max Current | 24 Amps |
| Power Port | LP34 Industrial Connector |
Important Infrastructure Note: This miner requires industrial 380-415V three-phase power and a closed-loop liquid cooling infrastructure. Standard household outlets are not compatible. Requires dedicated 32 amp three-phase breakers minimum. The LP34 industrial connector requirement excludes single-phase or residential deployment.
| Specification | Value |
|---|---|
| Inlet Coolant Temperature | 20–50°C |
| Coolant Flow Rate | 16.0–20.0 L/min |
| Coolant Pressure | ≤3.5 bar |
| Coolant Type | Antifreeze / Pure Water / Deionized Water |
| Coolant pH Range | Antifreeze: 7.0–9.0; Pure Water: 6.5–7.5; Deionized Water: 8.5–9.5 |
| Coolant Pipe Connector Diameter | OD14 mm |
| Storage Temperature | -20°C to 70°C |
| Operating Humidity | 10–90% (non-condensing) |
The SHA-256 algorithm is the Proof-of-Work hashing algorithm used by Bitcoin, Bitcoin Cash, and Bitcoin SV. It is the most widely recognized and secure hashing algorithm in the cryptocurrency industry.
The U3S21EXPH can mine multiple SHA-256 cryptocurrencies, including:
Bitcoin (BTC) – Primary coin
Bitcoin Cash (BCH)
Bitcoin SV (BSV)
First-of-its-Kind DLC Cooling: Direct liquid-to-chip cooling within a U form factor makes it rack-ready like traditional data center hardware.
High Density Deployment: Can be deployed at densities of up to ~180 kW per rack.
Exceptional Efficiency: 13 J/TH efficiency is highly competitive in the current market.
Proven Manufacturer: Bitmain is the world’s largest manufacturer of digital currency mining servers.
Massively Scaled: Already being deployed at scale by Hut 8 at their 205 MW Vega data center.
Industrial Infrastructure Required: Requires 380-415V three-phase power and liquid cooling infrastructure.
High Power Consumption: 11,180W requires significant electricity capacity.
Large Footprint: 900mm chassis depth exceeds standard 1000mm rack depth with minimal clearance—may require deeper industrial racks.
Thermal Load: Each unit generates approximately 11.2 kW thermal load (38,144 BTU per hour), requiring substantial cooling infrastructure.
Prior Generation Status: The January 2026 launch of the S23 Hyd 3U (1.16 PH/s at 9.5 J/TH) captured the flagship position, positioning the U3S21EXPH as the value play in the 3U petahash tier.
Low Electricity Rates: Best operated with electricity costs below $0.05/kWh for optimal ROI.
Industrial Facility: Requires commercial/industrial infrastructure with 380-415V power and liquid cooling.
Bulk Operations: Per rack deployment math: 14 units per 42U rack produce 12.04 PH/s aggregate at approximately 156 kW total power draw.
Long-Term Commitment: The acquisition cost to efficiency tradeoff defines the purchase decision.
This Bitmain Antminer U3S21EXPH represents a significant investment for professional miners with suitable industrial infrastructure. With 860 TH/s hashrate, direct liquid-to-chip cooling, and Bitmain’s proven reliability, these miners are built for industrial-scale Bitcoin mining operations.
Bitmain is the world's leading ASIC miner manufacturer, and the Antminer lineup remains the benchmark every competing brand gets measured against — covering Bitcoin (SHA-256), Litecoin and Dogecoin (Scrypt), and Zcash (Equihash) mining across both current-generation and value-priced secondhand hardware.
For miners prioritizing maximum efficiency right now, Bitmain's newest releases - including the Antminer S21 series for Bitcoin and the Antminer L9 for Litecoin/Dogecoin - represent the current leading edge in hashrate-per-watt performance, giving serious operations the lowest operational cost per unit mined of any generation Bitmain has released to date. For miners working with a tighter budget, our tested secondhand Antminer units (L3++, L3+, Z15, S17 Pro, and more) deliver the same reliable Bitmain engineering at a fraction of new-unit pricing - each one tested and backed by warranty support before it ships.
Every Antminer we sell is sourced directly from Bitmain's supply chain, not resold through unverified third parties, and bulk/wholesale pricing is available for mining farms and larger operations. Whether you're scaling a Bitcoin mining farm, running Scrypt hardware for Litecoin and Dogecoin, or targeting Zcash specifically, Bitmain's Antminer line offers the widest coin coverage and the strongest secondhand resale market of any ASIC brand - making it easier to buy with confidence and easier to upgrade or resell down the line.
For those seeking bulk orders, Antminer wholesale options are available. This is an ideal choice for mining farms or businesses looking to scale operations. Wholesale options often provide discounts and bundled offers, making it easier to access high-performance hardware at a lower overall cost.
