Antminer S21 Immersion

Advanced Immersion Cooling with Antminer S21 Immersion
The Antminer S21 Immersion, launched by Bitmain in late 2024, is a state-of-the-art Bitcoin miner employing immersion cooling technology. This miner achieves a high hashrate of 215 to 301 TH/s, with power consumption varying between 3440 watts and 5569 watts. Its immersion cooling system submerges the hardware in a dielectric liquid, which drastically enhances heat dissipation and reduces the risk of overheating. This technology also allows the miner to operate more quietly despite maintaining powerful cooling, as it replaces noisy fans with liquid cooling efficiency while keeping the noise near 50 to 76 decibels depending on the model version.
Compact Size and Robust Design
Measuring 293 x 236 x 364 mm and weighing roughly 17.15 kilograms, the Antminer S21 Immersion fits neatly into both industrial mining farms and smaller, more space-conscious setups. The device supports a stable input voltage of 380 to 415 volts in a three-phase power configuration, ensuring consistent operation. It tolerates temperatures from 30 to 55°C and humidity ranging from 10% to 90%, making it suitable for various environmental conditions. Bitmain provides a 365-day warranty on the unit, reflecting confidence in its durable build and quality manufacturing. Its Ethernet interface ensures reliable connectivity for seamless remote monitoring and management.
Efficiency, Stability, and User Benefits
The immersion cooling in the S21 significantly boosts energy efficiency, reaching approximately 18.5 joules per terahash, which is superior to traditional air-cooled miners of similar power. This translates to lower electricity costs and longer hardware lifespan due to stabilized temperatures. Remote control software enables real-time tracking of hashrate, temperature, and power consumption, facilitating easy management even in large-scale operations. Overall, the Antminer S21 Immersion combines cutting-edge cooling technology with high computing power and robust engineering—making it an excellent choice for miners looking for sustainable, efficient, and stable Bitcoin mining in 2025.

1 Year WARRANTY 

PSU included