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Bitdeer SealMiner A3 Air 260TH/s BITCOIN (SHA256) Miner - New
Bitdeer SealMiner A3 Air 260TH/s BITCOIN (SHA256) Miner - New
(Product No.: 2025BTDSEALA3)
Bitdeer SealMiner A3 Air 260TH/s BITCOIN (SHA256) Miner - New

Bitdeer SealMiner A3 Air 260TH/s BITCOIN (SHA256) Miner - New

MillionMiner

Bitcoin BTC Bitcoin Cash BCH Bitcoin SV BSV ACOIN Curecoin CURE eMark DEM Joulecoin XJO Peercoin PPC Terracoin TRC Unbreakable UNB
 
Shipping time:
ORDERED (2 to 16 weeks) ORDERED (2 to 16 weeks)  (abroad may vary)
Hashrate: 260 TH/s
4.290,00 EUR

DDP = taxes/duty already paid and free Shipping costs


Description

Reliable Efficiency: Bitdeer SealMiner A3 Air 260TH/s Bitcoin Miner

The Bitdeer SealMiner A3 Air is built for miners who value simplicity, efficiency, and strong performance in a traditional air-cooled design. Offering a powerful 260TH/s hashrate at just 3640W, it delivers an excellent efficiency ratio that makes it ideal for both medium-scale and large mining setups. Designed around SHA256, this unit strikes a balance between robust performance and accessible energy demands, helping miners maintain profitability even with fluctuating electricity costs. With its 75dB noise level, the A3 Air is optimized for hosting facilities or dedicated mining environments where airflow is managed, and durability is required. Supporting 220–277V, it ensures compatibility across a wide range of power infrastructures, making deployment straightforward. Its operational range extends from -20°C to 45°C with humidity tolerance up to 90%, offering reliability in varied conditions. At 365 x 292 x 197mm and 15.5kg, it is compact, efficient, and easy to integrate into farm racks without sacrificing stability. Released in October 2025, the A3 Air demonstrates Bitdeer’s engineering expertise, providing a cost-effective yet powerful solution for Bitcoin miners. Whether as a standalone machine or scaled within a larger farm, this miner guarantees a reliable path to consistent SHA256 performance with proven air-cooling technology.

Bitdeer Sealminer A3 Air (260 TH/s) Bitcoin Crypto Miner Specifications:

Manufacturer Bitdeer
Model Sealminer A3 Air
Supported Algorithm SHA-256 (Bitcoin)
Hashrate 260 TH/s
Power Consumption 3640W 
Dimensions 365 x 292 x 197mm
Weight 15.5 kg
Operating Noise Level 75 dB
Cooling Air Cooling
Interface Ethernet
Temperature 5 - 40 °C
Humidity 10 - 90 %
Power Supply Unit Included
Release Date 2025 October
Warranty Period 6 months by the manufacturer
 
We are excited to announce that we've secured early allocation from Bitdeer's production queue, ensuring our customers are among the first to deploy the A3 Air. With demand surging for high-efficiency hydro-cooled units, this is a rare opportunity to gain a competitive edge in industrial-scale Bitcoin mining. Act now to reserve your unit and lock in elite performance at the forefront of SHA-256 mining innovation.

Bitdeer Sealminer A3 Series – Ultra-Efficient Bitcoin Miners with Free Worldwide Shipping from MillionMiner
The Bitdeer SealMiner A3 Air is a dependable choice for miners who prefer a straightforward and efficient solution. With 260TH/s of power in a compact design, it ensures strong performance at manageable energy costs. Count on the A3 Air for stability, scalability, and profitability in your Bitcoin mining operations.

Mineable Coins
 
 

Bitcoin (BTC)

The original cryptocurrency and digital gold standard. Bitcoin pioneered blockchain technology and remains the most secure and widely adopted cryptocurrency. It operates on a proof-of-work consensus mechanism and has a fixed supply of 21 million coins. Bitcoin serves as a store of value and digital currency for peer-to-peer transactions worldwide.

Bitcoin Cash (BCH)

A Bitcoin fork created in 2017 to improve transaction speed and reduce fees. Bitcoin Cash increased the block size limit to allow more transactions per block, making it more suitable for everyday payments. It maintains Bitcoin's core principles while focusing on scalability and lower transaction costs. BCH aims to be digital cash for the world.

Fractal Bitcoin (FB)

Fractal Bitcoin is a cryptocurrency that enhances the scalability of the Bitcoin network through a recursive sidechain architecture. By utilizing the Bitcoin Core code, it creates multiple layers on top of the Bitcoin blockchain, allowing for significantly higher transaction throughput and faster confirmation times of 30 seconds or less. As a merge-mined cryptocurrency, Fractal Bitcoin leverages the same mining process as Bitcoin, ensuring robust security and decentralization. Its goal is to facilitate the development of large-scale applications directly on the Bitcoin blockchain, thereby expanding its utility and potential for mass adoption.

Bitcoin SV (BSV)

Bitcoin Satoshi Vision emerged from a Bitcoin Cash fork, aiming to restore Bitcoin's original protocol. BSV features massive block sizes to enable high transaction throughput and low fees. It focuses on enterprise applications, data storage, and smart contracts while maintaining Bitcoin's proof-of-work security model. BSV positions itself as the true vision of Satoshi Nakamoto.

ACOIN

A SHA-256 based cryptocurrency that focuses on accessibility and community-driven development. ACOIN utilizes Bitcoin's proven mining algorithm while implementing features designed for everyday use. The project emphasizes fair distribution, sustainable mining practices, and building a strong community ecosystem. It aims to bridge traditional finance with blockchain technology.

Curecoin (CURE)

A unique cryptocurrency that combines blockchain mining with protein folding research for medical breakthroughs. Curecoin rewards miners for contributing computational power to Stanford University's Folding@home project, which helps research diseases like cancer and Alzheimer's. This innovative approach makes mining productive for humanity while maintaining network security through traditional SHA-256 mining.

eMark (DEM)

A German-originated cryptocurrency designed for practical digital payments and micropayments. eMark features fast transaction confirmations and low fees, making it suitable for everyday commerce. The project focuses on European markets and aims to provide a stable, reliable digital currency alternative. DEM emphasizes simplicity and user-friendly adoption for mainstream use.

Joulecoin (XJO)

Joulecoin (XJO) is a cryptocurrency that features quick confirmations and transaction comments, utilizing a customized version of Bitcoin's core technology with lowered block time for higher performance and a long proof-of-work period. It does not focus on energy efficiency or renewable energy usage.

Peercoin (PPC)

The first cryptocurrency to implement proof-of-stake consensus alongside proof-of-work. Peercoin pioneered the concept of minting coins through stake ownership, reducing energy consumption compared to pure mining systems. It features a unique approach to network security and coin distribution, combining the best of both consensus mechanisms. PPC is designed to be more sustainable and energy-efficient long-term.

Terracoin (TRC)

A Bitcoin-based cryptocurrency designed for stability and long-term value preservation. Terracoin implements enhanced security features and focuses on being a reliable store of value and medium of exchange. The project emphasizes steady development, community governance, and practical applications for digital commerce. TRC aims to provide a dependable alternative to traditional fiat currencies.

Unbreakable (UNB)

A security-focused cryptocurrency that emphasizes robust network protection and resistance to attacks. Unbreakable implements advanced cryptographic techniques and multiple security layers to ensure transaction integrity and network stability. The project prioritizes building an impenetrable blockchain infrastructure that can withstand various forms of digital threats. UNB represents the next generation of ultra-secure digital currencies.

Asic Miner Hosting

ASIC Miner Hosting

Discover Our Exclusive ASIC Miner Hosting Offer – optimized for the highest efficiency and performance of your mining equipment. We provide specialized hosting services for ASIC Miners with a consumption of more than 2.76 kW in our state-of-the-art data centers located in Russia, the United Arab Emirates, and the United States.

Full Access and Control: Through our user-friendly dashboard at eps.millionminer.com, you have full access to your miners at any time. Whether you need to reboot, reconfigure settings, or check the current status – it's all possible with just a few clicks.

Transparent Billing: At the beginning of each month, you will receive a detailed electricity bill that you can conveniently pay with USDT. Our billing processes are transparent and straightforward, ensuring you always have a clear overview.

Flexible Contract Terms: Our hosting contracts are designed for a 12-month term, but offer the flexibility to be automatically extended or cancelled if needed. If you decide to end your mining activities, you can easily remove your miners or have us sell them for you for a small fee.

Demo Account: Visit eps.millionminer.com to explore our demo account and see for yourself the simplicity and effectiveness of our dashboard. Experience how easy managing your mining hardware can be.

For More Information and Personal Consultation: Fill out the tool below, and a customer advisor will support you with any open questions shortly.

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