Antminer S21 Immersion – 239 TH/s

Antminer S21 Immersion SHA-256 ASIC Miner

The Antminer S21 Immersion is a high-performance ASIC miner designed for the SHA-256 algorithm, built to mine Bitcoin (BTC) and other SHA-256–based cryptocurrencies. Developed by Bitmain, it delivers a hashrate of 239 TH/s, targeting miners who prioritize efficiency, operational stability, and long-term performance.

Engineered for immersion cooling environments, the S21 Immersion focuses on sustained output, reduced thermal stress, and improved hardware lifespan. Its design supports both mid-scale and enterprise-level mining operations where performance consistency and infrastructure efficiency matter more than short-term spikes.

Core Highlights

• Algorithm: SHA-256

• Hashrate: 239 TH/s

• Mining Focus: Bitcoin and SHA-256–based cryptocurrencies

• Cooling Design: Optimized for immersion cooling systems

• Target Use: Professional and large-scale mining environments

Performance Overview

The Antminer S21 Immersion is built to balance power efficiency with high hashrate output, aiming for predictable operational costs and stable long-term returns. Advanced chip architecture allows it to maintain strong performance while reducing energy loss and thermal degradation when deployed in proper immersion setups.

Profitability depends on Bitcoin price, network difficulty, electricity cost, and cooling infrastructure efficiency. An income profitability calculator and ROI chart can be used to model daily, monthly, and annual returns under different conditions.

Design and Operation

• Compact, industrial-grade build suitable for dense deployments

• Designed for continuous operation in immersion-cooled facilities

• Reduced hardware stress compared to air-cooled alternatives

• Built with durability and uptime as core priorities

Monitoring and Management

The S21 Immersion supports user-friendly monitoring tools that allow miners to:

• Track hashrate and performance metrics in real time

• Monitor system stability and operational status

• Adjust settings to optimize efficiency and output

• Manage deployments remotely across multiple units

This makes it suitable for operators managing both single installations and large mining fleets.

Security and Reliability

• Built-in safeguards to protect mining operations

• Designed to operate securely in professional data center environments

• Stable firmware designed for long-term SHA-256 mining workloads

Why Choose Antminer S21 Immersion

• High-density SHA-256 performance at 239 TH/s

• Optimized for immersion cooling strategies

• Reliable Bitmain hardware and proven chip technology

• Suitable for serious miners focused on efficiency and scale

• Designed for long-term Bitcoin mining operations