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Rectangular metal mining unit with front grille and rear exhaust, matte grey finish, RJ45 port visible

Antminer

Antminer S21 Pro+ 245T Air-Cooling mining hardware

SKU CH-EMEX-9N7QT

SHA-256 ASIC miner delivers 245 Th/s at 15 J/TH with 3675 W power draw and 76 dBA noise

  • Part#S21 Pro+ 245T
  • TypeMining Machine/Miner
  • Crypto AlgorithmSHA256
  • Compatible CurrencyBitcoin (BTC)
  • Mining HardwareASIC
  • Hashrate245 Th/s
  • 245 Th/s hashrate for high Bitcoin mining throughput
  • 15 J/TH power efficiency reduces electricity cost per terahash
  • 3675 W typical power draw with ±5 % tolerance
  • 76 dBA noise level at 30 °C ambient temperature
  • RJ45 Ethernet 10/100M provides wired network connectivity

What this miner does

The Antminer S21 Pro+ 245T is an air-cooled ASIC built for SHA256 mining of Bitcoin, Bitcoin Cash and Bitcoin SV. It delivers a typical hashrate of 245 Th/s at 3675 W with a rated efficiency of 15 J/TH and connects through a single RJ45 10/100M Ethernet port.

The figure that decides fit

Power efficiency of 15 J/TH determines whether the unit meets your electricity cost target; actual hashrate may vary by ±3% and wall power by ±5%, so calculate profitability with those tolerances in mind.

Installation and common issues

The miner runs on 220–277 V AC at 50–60 Hz with a maximum draw of 20 A, so the circuit and PDU must be rated accordingly. It operates from -20 °C to 45 °C at up to 2000 m altitude and produces 76 dBA at 30 °C, requiring adequate airflow and noise planning.

Highlights

  • 245 Th/s hashrate for high Bitcoin mining throughput
  • 15 J/TH power efficiency reduces electricity cost per terahash
  • 3675 W typical power draw with ±5 % tolerance
  • 76 dBA noise level at 30 °C ambient temperature
  • RJ45 Ethernet 10/100M provides wired network connectivity

Specifications

BrandAntminer
SeriesS21 Pro+
ModelS21 Pro+ 245T
Part#S21 Pro+ 245T
TypeMining Machine/Miner
Crypto AlgorithmSHA256
Compatible CurrencyBitcoin (BTC)
Mining HardwareASIC
Hashrate245 Th/s
Network ConnectionRJ45 Ethernet 10/100M
Noise level76 Noise(3-2)@30℃, dBA
Power Consumption3675 W
Power Efficiency15 J/TH
Operation Temperature-20~45°C
Storage Temperature-20~70°C
Operation Humidity10%~90%RH
Dimension450*219*293mm
Weight18.5kg

Questions about this item

What does the 245 Th/s hashrate mean for daily Bitcoin mining output?

The 245 Th/s hashrate is the typical SHA256 processing speed; actual output fluctuates by ±3% depending on network difficulty and pool luck.

How does the RJ45 Ethernet 10/100M interface limit mining pool connectivity?

The 10/100M Ethernet port caps network throughput at 100 Mbps, which is sufficient for stratum protocol traffic but prevents gigabit LAN speeds.

Will the 450×219×293 mm dimensions fit a standard 19-inch server rack?

The unit measures 450 mm wide by 219 mm high by 293 mm deep and weighs 18.5 kg, requiring a shelf or rails rated for that depth and weight.

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