Bitcoin Miner S21 Imm Overview

The Bitmain Antminer S21 Imm is an immersion‑cooled SHA‑256 miner designed for Bitcoin, BCH, and BSV. With a hashrate of 215 TH/s in Normal Energy Mode (NEM) and up to 301 TH/s in High Energy Mode (HEM), it balances performance with efficiency.

Key Specifications

• Hashrate: 215 TH/s (NEM) / 301 TH/s (HEM)
• Power Consumption: 3440W (NEM) / 5569W (HEM)
• Efficiency: 16 J/TH (NEM) / 18.5 J/TH (HEM)
• Algorithm: SHA‑256 (BTC/BCH/BSV)
• Cooling: Immersion cooling system
• Dimensions (unit): 293 × 236 × 364 mm
• Dimensions (packaged): 600 × 390 × 450 mm
• Weight: 17.15 kg net / 20.45 kg gross
• Voltage: 380–415V AC, 3‑phase
• Interface: RJ45 Ethernet
• Environment Requirements: Inlet oil temperature 30–55 °C, oil flow 1 m³/h

🛒 Purchasing Guidelines

• Price: $1,198.88 per unit (~$8 per TH)
• Payment Methods: USD, BTC, ETH, USDC (ERC20), USDT (ERC20/TRC20)
• Availability: SPOT shipping within 7 working days after full payment
• Customs: Buyers must prepare proper documentation; cancellations or refunds are not accepted after order submission
• Images: Product photos are for reference only; final shipment version may differ

🚚 Shipping Details

• Dispatch: First‑paid, first‑shipped basis
• Responsibility: Buyer must handle customs clearance and documentation
• Certificates: Certificates of conformity are available for download

🛡 Warranty

• Coverage: 365 days from shipping date
• Includes: Replacement shipping costs covered by Bitmain within warranty period
• Exclusions: Resold units, improper installation, unauthorized modifications

⚠️ Buyer Considerations

• Requires 380–415V AC 3‑phase industrial power
• Immersion cooling setup required — not suitable for home use
• Profitability depends on Bitcoin difficulty and electricity rates
• Ensure proper immersion oil setup and maintenance per Bitmain’s guidelines