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| Manufacture | Bitmain |
| Model | S21j XP Hyd. |
| Version | 495T-10 |
| Crypto algorithm/coins | SHA256 / BTC / BCH / BSV |
| Typical hashrate | 495 TH/s (±3%) |
| Power on wall @35°C | 5940 W (±5%) |
| Power efficiency @35°C | 12.0 J/T (±5%) |
The Bitmain Antminer S21j XP Hyd. is a high-performance liquid-cooling ASIC miner engineered to deliver superior returns on the SHA256 algorithm, supporting Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV).
Delivering a robust hashrate of 495 TH/s with a power consumption of 5940W, this machine achieves a highly efficient 12 J/T ratio. Equipped with standard OD10 liquid cooling connectors, it is purpose-built for professional mining facilities looking to maximize rack density, eliminate fan noise, and maintain stable, overclocked performance in large-scale container deployments.
High-Efficiency Liquid Cooling: Utilizing direct-to-chip hydro-cooling, it drastically reduces operational temperatures and eliminates the need for noisy air fans. This leads to a longer hardware lifespan and superior performance stability.
Industry-Standard OD10 Connectors: Built for seamless integration into existing hydro containers. It uses the standard OD10 pipe connector, requiring a coolant flow of 8.0~10.0 L/min.
Optimized 12 J/T Efficiency: Strikes a powerful balance between a massive 495T hashrate and manageable power consumption, ensuring your operational margins remain highly profitable.
Space-Saving Chassis: With a compact size of 430 x 176 x 208 mm and a net weight of 16.2 kg, it allows facilities to maximize their computational density per rack.
| Feature | Value |
|---|---|
| Model | S21j XP Hyd. |
| Version | 495T-10 |
| Crypto algorithm/coins | SHA256 / BTC / BCH / BSV |
| Typical hashrate | 495 TH/s (±3%) |
| Power on wall @35°C | 5940 W (±5%) |
| Power efficiency @35°C | 12.0 J/T (±5%) |
Power Supply
| Feature | Value |
|---|---|
| Phase | 3 |
| Input voltage | 380~415 V |
| Input frequency range | 50~60 Hz |
| Input max current | 12 Amp |
Hardware Configuration
| Feature | Value |
|---|---|
| Network connection mode | RJ45 Ethernet 10/100M |
| Server size (w/o package) | 430 x 176 x 208 mm |
| Server size (with package) | 570 x 316 x 430 mm |
| Net weight | 16.2 kg |
| Gross weight | 18.3 kg |
Environment Requirements
| Feature | Value |
|---|---|
| Inlet coolant temperature | 20~50 °C |
| Coolant flow | 8.0~10.0 L/min |
| Coolant pressure | ≤3.5 bar |
| Working coolant | Antifreeze / Pure water / Deionized water |
| Coolant pH value | Antifreeze: 7.0~9.0 / Pure water: 6.5~7.5 / Deionized water: 8.5~9.5 |
| Diameter of coolant pipe connector | OD10 mm |
| Storage temperature | -20~70 °C |
| Operation humidity (non-condensing) | 10~90% RH |
Notes:
(1-1) The hashrate value, power on wall, and power efficiency on wall are all typical values. Actual fluctuations are ±3% for hashrate, and ±5% for power and efficiency.
(1-2) Inlet coolant temperature.
(2-1) Caution: Wrong input voltage may cause server damage.
(2-2) For detailed working coolant use and maintenance, please refer to the official “ANTSPACE HW7 Liquid cooling container & Dry-cooling Tower product manual”.
Q: What are the power requirements for the S21j XP Hyd.?
A: It requires a 3-phase power supply. The input voltage must be between 380V and 415V with a frequency of 50~60Hz, drawing a maximum current of 12 Amps.
Q: What type of water pipe connector does it use?
A: It uses standard OD10 mm connectors. It requires a coolant flow of 8.0 to 10.0 L/min with a pressure not exceeding 3.5 bar.
Q: What coolant is compatible with this machine?
A: You can use Antifreeze, Pure water, or Deionized water. To prevent corrosion, strictly maintain the pH levels: Antifreeze (7.0~9.0), Pure water (6.5~7.5), and Deionized water (8.5~9.5).
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