Antminer S21 Immersion – 227 TH/s

Product Description

The Antminer S21 Immersion is an immersion-cooled SHA-256 ASIC miner from Bitmain, used to mine Bitcoin (BTC), Bitcoin Cash (BCH) and Bitcoin SV (BSV). This model is rated at 215-301 TH/s at 3,440-5,569 W depending on the version or power mode. This 227 TH/s version is estimated at about 3,630 W (16.0 J/TH), based on Bitmain’s rated 16 J/TH for the S21 Immersion in normal mode; the maker does not publish a separate rating for this version, and actual draw varies by unit and power mode.

As an immersion-cooled machine it is built to run submerged in dielectric fluid inside an immersion tank and is not meant to run in open air. Read Immersion cooling for crypto mining for what a setup needs.

Before you order

• Input power: rated 380-415 V AC three-phase.
• Algorithm: SHA-256. Read what hashprice means for SHA-256 miners.
• Released: December 2024.

Compare other models in our Bitcoin Miners (SHA-256) range, or see how efficiency is measured in Hashrate, TH/s and J/TH explained.

Technical Specifications

Frequently asked questions

How much power does the Antminer S21 Immersion use?

This 227 TH/s version is estimated at about 3,630 W (3.6 kW) from a 380-415 V AC three-phase supply. A load this size is sized by an electrical engineer, not a household breaker.

Can I run the Antminer S21 Immersion at home?

Not in an ordinary home. It needs 380-415 V AC three-phase power and an immersion tank filled with dielectric cooling fluid, plus a pump and heat exchanger; it does not cool itself out of the box. Plan it as a facility installation and read our guide to immersion cooling.

What coins can the Antminer S21 Immersion mine?

It mines SHA-256, so it can mine Bitcoin (BTC) and other SHA-256 coins such as Bitcoin Cash (BCH). It works with any SHA-256 pool; see mining pools explained.

Does the Antminer S21 Immersion come with a warranty?

Yes. This listing is for a new unit with a 30-day limited warranty from Bitminers, starting on the date of delivery. A manufacturer warranty may also apply. See our Warranty Policy.

Shipping, Payment, Warranty & Returns

• Shipping: United States only. Flat rate of $120 per order. Orders are dispatched within 5-10 business days after payment is received, and transit within the US takes 0-1 business days after dispatch. See our Shipping Policy.
• Payment: bank transfer. Our bank details are provided after you place your order. See our Payment Policy.
• Warranty: 30-day limited warranty from Bitminers, starting on the date of delivery. A manufacturer warranty may also apply. See our Warranty Policy.
• Returns: eligible items can be returned within 20 calendar days of delivery. See our Return & Refund Policy.

Related guides: Antminer S21 series explained · Antminer models explained · Immersion cooling for crypto mining

Mining results depend on electricity costs, network difficulty and cryptocurrency prices. Bitminers does not guarantee mining profitability or return on investment.