The Bitmain Antminer S21 Pro (245Th/s) is a high-performance, air-cooled Bitcoin ASIC miner designed for professional and large-scale mining operations that require a balance of strong hashrate, reliability, and efficient power usage. Built for the SHA-256 algorithm, the S21 Pro is optimized specifically for Bitcoin (BTC) mining.

Delivering a powerful 245 TH/s hashrate with a power consumption of 3675W, the Antminer S21 Pro achieves an efficiency of 15 J/TH, making it a highly competitive option within Bitmain’s S21 product line. This miner is well-suited for operators seeking modern-generation hardware without the complexity of liquid or hydro cooling systems.

Released in November 2025, the S21 Pro features a robust air-cooling design with dual high-efficiency fans, ensuring stable thermal performance during continuous 24/7 operation. With a noise level of 75 dB, it is ideal for industrial mining facilities, hosting environments, and dedicated mining spaces.

Equipped with standard Ethernet connectivity, the Antminer S21 Pro integrates seamlessly into existing mining infrastructure. Backed by Bitmain’s proven manufacturing quality and next-generation ASIC architecture, this miner is a solid choice for professional Bitcoin miners focused on reliability, scalability, and long-term operation.

Key Features:

• Strong 245 TH/s Bitcoin hashrate

• Efficient 15 J/TH performance

• Proven air-cooled S21 architecture

• Designed for professional and large-scale mining

• Reliable Bitmain build quality