# Bitmain Launches Antminer S21 and S21 Pro Miners

**Published:** 2026-06-12T12:03:10.679Z  
**Topic:** Antminer  
**Sentiment:** neutral  
**Publisher:** TrendWatcher — https://www.trendwatcher.in/article/e61b6242-d8e0-4d96-b3b7-98684b74ce5b

Bitmain released the Antminer S21 series in 2023 and the S21 Pro in 2024, offering improved efficiency and hash rates for Bitcoin mining.

Bitmain, a leading manufacturer of Bitcoin mining rigs, expanded its hardware lineup with the Antminer S21 series and the subsequent S21 Pro model. The S21 series, announced in late 2023, serves as the successor to the S19 line, while the S21 Pro was introduced in 2024 with enhanced specifications [1][2].

**Key takeaways**
*   The base Antminer S21 offers a hash rate of 200 TH/s with an efficiency of 17.5 J/TH [2].
*   The newer Antminer S21 Pro improves performance to 234 TH/s and 15.0 J/TH [1].
*   Both models are designed to withstand operating temperatures up to 45 degrees Celsius [1][2].
*   Bitmain plans to begin shipping the S21 Pro in the third quarter of 2024 [1].

## Technical specifications and design updates
The Antminer S21 series utilizes advanced 5nm ASIC chip technology to mine SHA-256 cryptocurrencies like Bitcoin, Bitcoin Cash, and Bitcoin SV [2]. The base air-cooled S21 model delivers a hash rate of 200 TH/s with a power consumption of 3500 W, resulting in an energy efficiency of 17.5 J/TH [2]. In March 2024, Bitmain launched the S21 Pro, an upgrade that boosts the hash rate to 234 TH/s and improves efficiency to 15.0 J/TH, making it more powerful than its predecessor [1].

Both devices are engineered for durability in challenging environments, with the ability to operate reliably at ambient temperatures up to 45 degrees Celsius (113 degrees Fahrenheit) [1][2]. The S21 features a compact design measuring 400 × 195 × 290 mm and weighing 15.4 kg, including its integrated power supply unit [2]. It employs an air-cooling system with fans providing a maximum airflow of 380 CFM, though noise levels can reach 76 dBA at maximum fan RPM [2].

## Release timeline and purchasing terms
Bitmain unveiled the original S21 at the World Digital Mining Summit in September 2023, and the unit subsequently sold out via the company's website [1][2]. The S21 Pro was announced at the same event in 2024, with Bitmain setting the after-coupon price at $18.9 per terahash and scheduling shipments for the third quarter of 2024 [1]. The manufacturer notes that actual hash rates may fluctuate by ±3% and power consumption by ±5%, while orders cannot be canceled or refunded once submitted [3].

## Why it matters
The release of the S21 series represents a significant advancement in energy efficiency for SHA-256 miners, a critical factor as the industry faces reduced block rewards following the Bitcoin halving [2]. By delivering higher performance per watt, these rigs are intended to help large-scale mining farms maintain competitiveness and secure the network [2]. Bitmain positions the S21 Pro as a tool for long-term expansion planning, though the company cautions that machine prices are subject to frequent adjustments based on market variables [1][3].

## Sources
1. Bitcoin Magazine — [Bitmain Launches Antminer S21 Pro, Its Most Advanced Bitcoin Miner](https://bitcoinmagazine.com/business/bitmain-launches-antminer-s21-pro-advanced-bitcoin-mining)
2. Grokipedia — [Antminer S21](https://grokipedia.com/page/Antminer_S21)
3. Bitmain — [Bitmain Antminer S21 Pro - Official Bitmain Store](https://bitmain.digital/bitcoin_miner_s21_pro.html)

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Cite as: TrendWatcher, "Bitmain Launches Antminer S21 and S21 Pro Miners", https://www.trendwatcher.in/article/e61b6242-d8e0-4d96-b3b7-98684b74ce5b