Bitmain Antminer S21+ Hydro Bitcoin Miner
The Antminer S21+ Hydro, manufactured by Bitmain, operates on the SHA-256 algorithm, with hashrate specifications of 338T, 358T, and 395T, and corresponding power consumption ratings of 5070W, 5370W, and 5925W.
Price range: $2,699.00 through $3,199.00
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Overview
The Antminer S21+ Hydro from Bitmain, launched in February 2025, is a robust and advanced Bitcoin miner designed for modern mining needs. Operating on the SHA-256 algorithm, it delivers high hash rates ranging from 338 Th/s to 395 Th/s, with corresponding power consumption between 5070W and 5925W. Weighing approximately 14.5 kg (14,500 g) and measuring 339 × 173 × 207 mm, the miner features an efficient hydro-cooling system—requiring coolant with a pH of 8.0–10.0—that maintains a low noise level of 50 dB for a quieter mining environment. It operates on 380–415V voltage, offers storage temperature tolerance from -20°C to 70°C, and embodies an industry-standard design focused on high performance, effective heat dissipation, and user convenience.
Specification
| Manufacturer | Bitmain |
| Model | Antminer S21+Hyd |
| Size w/o | 339 x 173 x 207mm |
| Size with | 570 x 316 x 430mm |
| Weight Net | 14.5kg |
| Weight Gross | 16.4kg |
| Noise level | 50db |
| Storage Temp. | -20-70 |
| Power | 5070W – 5925W |
| Voltage | 380-415V |
| Working coolant | Antifreeze/ Pure water/Deionized water |
| Coolant PH value | Antifreeze: 7.0~9.0 Prue water: 6.5~7.5 Deionized water：8.5~9.5 |
| Coolant Flow, L/min | 8.0~10.0 |
| Coolant pressure, bar | ≤3.5 |
| Interface | Ethernet |
| Temperature | 20 – 50 °C |
| Humidity | 10 – 90 % |
| Warranty | 365 Days |
Bitmain Antminer S21+ Hydro FAQs
The Antminer S21+ Hydro achieves a hashing performance of 338TH/s, 358TH/s and 395 TH/s, ensuring strong efficiency in Bitcoin mining operations.
To operate at its high performance level, the Antminer S21+ Hydro requires between 5070W and 5925W of power.
With a noise output of 50 decibels, the Bitmain Antminer S21+ Hydro operates at a remarkably quiet level for a high-performance miner.
The Antminer S21+ Hydro has a net weight of 14.5 kg, with a gross weight of 16.4 kg, ensuring both stability during operation and manageable handling during setup.
Operating on the SHA-256 algorithm, the Bitmain Antminer S21+ Hydro is designed for Bitcoin mining.
The Antminer S21+ Hydro operates on an input voltage range of 380V to 415V, ensuring compatibility with standard high-power mining setups.
With dimensions of 339 x 173 x 207mm, its compact form allows for flexible placement in space-constrained environments without compromising performance.
Bitmain supports the Antminer S21+ Hydro with a full 365-day manufacturer’s warranty, providing coverage for defects in materials and workmanship.
For optimal efficiency and longevity, it is recommended to operate the Bitmain Antminer S21+ Hydro within an ambient temperature range of 20°C to 50°C.
The operational lifespan of an ASIC miner is primarily influenced by temperature management, cooling efficiency, power stability, and maintenance practices. Units operating in stable, cool environments with advanced cooling solutions (such as hydro or immersion systems) generally demonstrate greater longevity compared to air-cooled models subjected to dust accumulation and thermal stress.
Hydro cooling significantly lowers operational noise, enhances thermal dissipation, and prolongs equipment durability. While more efficient than air cooling, it involves greater initial investment and requires precise installation.
Main Parameters
| Mineable Coins |
Bitcoin |
|---|---|
| Algorithm |
SHA-256 |
| Hashrate |
338Th/s ,358Th/s ,395Th/s |
| Consumption |
5070W ,5370W ,5925W |
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Every brand-new miner is backed by a manufacturer's warranty, which is valid for a period of 180 days to 365 days.
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