Take control of your mining facility’s profit margins with the Bitmain Antminer S21 225 TH/s. Standing as the air-cooled gold standard of Bitmain’s highly successful S21 series, this hardware delivers a monumental computing output without requiring complex liquid cooling or immersion tank infrastructure. It is designed to step seamlessly into traditional data center server racks, providing commercial operators and home miners alike with an unshakeable competitive edge against rising network difficulties.
Operating on the dominant SHA-256 algorithm, this high-yield node generates a rock-solid, reliable throughput of $225\text{ Terahashes}$ to optimize your returns across Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV).
Technical Specifications
| Feature | Specification |
| Manufacturer | Bitmain |
| Model | Antminer S21 (225 TH/s Variant) |
| Hashrate | $225 \text{ TH/s} \pm 3\%$ |
| Power Consumption (on wall) | $\sim 3375\text{W} \pm 5\%$ |
| Power Efficiency | $15.0 \text{ J/TH} \pm 5\%$ |
| Algorithm | SHA-256 (BTC / BCH / BSV) |
| Cooling Architecture | 4 High-Speed Air-Cooling Fans |
| Required Input Voltage | AC 220~277V |
| Operational Noise Level | $\sim 75 \text{ dB}$ |
| Dimensions (L x W x H) | 400 x 195 x 290 mm |
| Net Weight | 15.40 kg |
Key Features & Performance Highlights
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Sub-16 J/TH Peak Efficiency ($15.0 \text{ J/TH}$): The Antminer S21 achieves a spectacular energy milestone, drawing just $15.0 \text{ Joules per Terahash}$. This ultra-low power consumption translates directly to lower utility bills and higher net profitability, protecting your capital investments against market halving events.
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Plug-and-Play Air-Cooled Design: Avoid the high upfront costs and structural dependencies of hydro loops or liquid immersion systems. The S21 Air relies on a standard air-tunnel design, making it immediately compatible with existing commercial racks and ventilation setups.
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Heavy-Duty Parallel Fan Configuration: Outfitted with four high-RPM industrial cooling fans arranged in a parallel push-pull wind tunnel layout, the hardware quickly expels heat from the internal hashboards. This continuous thermal regulation prevents chip degradation and extends the physical lifespan of the miner under continuous 24/7 load.
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Upgraded APW12 Smart Power Supply: The integrated high-efficiency power supply features intelligent voltage tracking and built-in circuit defense mechanisms. It safeguards the fragile internal components against voltage drops, short circuits, and sudden grid fluctuations, keeping your miner safely online.
Why Buy From CryptoMiners24?
Procuring your elite hashing infrastructure through CryptoMiners24 guarantees a premier enterprise hardware partnership:
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Fully Insured Priority Freight: We route high-value, heavy industrial equipment exclusively through trusted premium logistics lines (DHL Express, FedEx, UPS) with comprehensive transit insurance included.
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100% Authentic Factory-Sealed Stock: All high-performance units are dispatched directly from our verified inventory, complete with pristine original manufacturer seals and active serial numbers.
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Comprehensive Enterprise Logistics Support: Our specialized support desk provides direct assistance with tariff documentation, customs clearance logistics, and hardware deployment infrastructure.
Secure your block rewards. Add the high-efficiency Bitmain Antminer S21 225 TH/s to your mining fleet today.
