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Power
3640W
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Hashrate
260.00 TH/s
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Efficiency
14 J/T
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Algorithm
SHA-256
Bitdeer SealMiner A3 Air Bitcoin Miner 260TH/S | BT-MINERS
US$3,999.00
Top Hashrate : Up to 100% better than the previous generation
High Stability : Supports 24/7 continuous operation
US Stock : Ships immediately from local US warehouse
Warranty : Come with 6-month factory warranty.
A3 Air Profitability Calculate
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Description
SEALMINER A3 Air 260T Description
Bitdeer SealMiner A3 Air is an ASIC miner designed for SHA-256 algorithm, specifically targeting BTC (Bitcoin) . It delivers a maximum hashrate of 260Th/s while consuming 3640W of power, resulting in an energy efficiency of 14j/Th.
Technical Specifications
| Product Glance | Value |
|---|---|
| Model | Sealminer A3 Air |
| Crypto algorithm/coins | SHA256| BTC/BCH/BSV |
| Typical hashrate | 260TH/s |
| Power on wall @35℃, Watt | 3640W±10% |
| Power efficiency on wall@35℃ | 14 J/TH±5% |
| Detailed Characteristics | Value |
|---|---|
| Power Supply | |
| Phase | 1 |
| Input voltage, Volt | 220~277 |
| Input frequency range, Hz | 50~60 |
| Input max current, Amp | 27 |
| Hardware Configuration | |
| Networking connection mode | RJ45 Ethemet 10/100M |
| Server size(length*width*height, w/o package), mm | 197*365*292 |
| Server size(length*width*height, with package), mm | 308*482*423 |
| Net weight, kg | 15.5 |
| Gross weight, kg | 17.5 |
| Environment Requirements | Value |
|---|---|
| Storage temperature, °C | -30~70 |
| Operation humidity(non-condensing), RH | 10~90% |
| Operation temperature,°C | -20~45 |
| Operation altitude, m | ≤2000 |
| What's in the Box | Value |
|---|---|
| Original factory mining machinery | ✓ |
| Power supply | ✓ |
| Shockproof packaging | ✓ |
Notes
(1) The hashrate value, power on wall, and power efficiency on wall are all typical values. The actual hashrate value fluctuates by ±3%, and the actual power on wall and power efficiency on wall fluctuate by ±5%.
(2) Caution: Wrong input voltage may cause server damaged.
(3) The noise is loudest when the fan is under maximum RPM(rotation per minute).
(4) When the server is used at an altitude from 900m to 2000m, the highest operating temperature decreases by 1℃ for every increase of 300m.
Estimate time
Please select your preferred product batch – Available Now (In Stock) for immediate shipment or Month Batch for delivery within your chosen timeframe. If no selection is needed, the product is in stock and ready to ship. If you haven’t received your miner after the estimated time, please contact us at store@bt-miners.com, and our team will assist you promptly.
Shipping
All used miners will undergo testing by our certified technicians before shipping, which requires 3-5 business days. New miners will be shipped from our Shenzhen or Hong Kong warehouse, with international delivery taking approximately 5-10 business days via DHL. Once your order is shipped, you will receive a confirmation email with a tracking number. Shipping fees are calculated based on product type and weight, varying by region.
Returning policy
All sales are final and non-refundable after shipment, but we offer repair and replacement services if there are technical issues with your miner.
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SEALMINER A3 Air Description
SEALMINER A3 Air DescriptionThe Bitdeer SealMiner A3 Air Bitcoin Miner 260TH/s is engineered for miners who need reliable performance, flexible deployment, and efficient SHA-256 mining without the complexity of liquid cooling systems. As part of Bitdeer’s SealMiner A3 series, this model is designed to deliver consistent output as Bitcoin network difficulty continues to evolve.
With a hashrate of 260TH/s and a power draw of approximately 3250W, the A3 Air offers competitive efficiency for large-scale and hosted mining operations. Its air-cooling system uses high-performance fans to maintain operating temperatures during continuous 24/7 operation. Adequate airflow and proper environmental control are essential to ensure long-term stability.
Bitdeer Legacy & Product Line
Bitdeer Technologies is a global Bitcoin mining infrastructure company known for its strong presence in large-scale mining operations and high-performance ASIC hardware development. Founded by industry veterans with deep roots in the Bitcoin mining ecosystem, Bitdeer has built and operated mining data centers across North America, Europe, and Asia. This hands-on operational experience gives the company a practical understanding of power efficiency, thermal management, and long-term hardware reliability.
Bitdeer’s hardware offerings are marketed under the SealMiner brand, a product line designed specifically for professional and industrial Bitcoin mining. SealMiner miners focus on the SHA-256 algorithm and are engineered to deliver high hashrate while maintaining competitive energy efficiency. Rather than targeting entry-level or home users, Bitdeer products are optimized for environments where uptime, stability, and scalability are critical.
The SealMiner A Series, including advanced hydro-cooled models such as the SealMiner A3 Pro Hyd, reflects Bitdeer’s emphasis on thermal control and dense deployment. Hydro cooling helps reduce noise, improve heat dissipation, and extend hardware lifespan in large mining facilities.
Today, Bitdeer stands alongside established manufacturers like Bitmain and MicroBT, offering miners an alternative backed by real mining operations experience. Its product line is built for miners who prioritize efficiency-driven performance and sustainable, long-term Bitcoin mining operations.
Bitdeer SealMiner A3 Air vs Antminer S21
The SealMiner A3 Air delivers higher hashrate and better efficiency than the Antminer S21 while operating on standard 220–240V power. This makes it easier to deploy in a wider range of mining environments. The S21 remains suitable for high-voltage mining farms, but the A3 Air offers greater flexibility and lower infrastructure requirements for professional operators.
| Field | SealMiner A3 Air | Antminer S21 |
|---|---|---|
| Model | A3 Air | S21 |
| Hashrate | 260 TH/s | ~200 TH/s |
| Power | ~3250 W | ~3550 W |
| Efficiency | ~12.5 J/TH | ~17.5 J/TH |
| Cooling | Air-cooled | Air-cooled |
| Voltage | 220–240 V | 380–415 V |
| Noise | High | High |
| Best For | Flexible deployment | High-voltage farms |
| Notes | Easier power requirements | Higher voltage demand |
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Processing&Shipping Time
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Payment Policies
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Taxes and Custom Duties
Processing&Shipping Time
Payment Policies
Taxes and Custom Duties
All shipments will go out by UPS or DHL.
Please contact us if any documentations are requested by customs.
Our product are excluded of all value added taxes and customs duties sold by BT-Miners. You will be solely responsible for paying any outstanding taxes and duties as per your country’s law and customs. Client will be responsible for additional shipping charges if items are returned to sender.
Contact us at store@bt-miners.com or 813-820-0668 if you have any questions.
All products on our website are priced in US Dollars.
Payment made by credit or debit card may subject to card processing fees.
We can accept payment by credit/ debit card, wire transfer, ACH transfer (through our online portal), and crypto.
*Machine prices will fluctuate according to the current market price.*
All orders will be dispatch in the order which they were received. Pre-orders typically ships at the end of the month of the batch but may delay if manufacturer delays release/shipment. In stock machines ship in 3-7 business days from our warehouse in China. Bulk orders may release a few days later.
We always try to ship as soon as we can via USP or DHL after full payment has been received and verified.
International shipping usually takes about 5-8 business days. Due to changing regulations, we will not be able to cover duty tax for all orders entering USA. Deliveries to other countries may require customers to clear customs and pay duty tax. Please notify us right away if documents are requested by customs as improper filing may result in higher fees and/or delays.
All sales are final and non-refundable on any terms.
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FAQs
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What Is The Lifespan Of This Mining Machine?
The lifespan of mining hardware is influenced by usage intensity, environmental factors like temperature, humidity, and dust. Proper maintenance and optimal conditions can significantly extend its longevity.
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How Does Electricity Cost Impact Profitability?
Electricity costs play a crucial role in mining profitability, as high rates can quickly offset profit. Therefore, it is vital to access local electricity costs to determine if mining is viable. With high electricity costs and high liquidity of digital assets, investing in an energy-efficient miner becomes even more important.
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Does BT-MINERS offer worldwide shipping?
Yes, fast worldwide delivery is available.
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Is a power supply included?
Power configuration depends on batch and order details.
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Does BT-MINERS test the miner before shipping?
Yes, all units are tested prior to dispatch.
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How noisy is the miner?
Like most air-cooled ASICs, it produces high operational noise.
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Does it require liquid cooling?
No, it uses an air-cooling system.
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What voltage does it require?
Standard 220–240V power input.
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Is the A3 Air suitable for home mining?
It is primarily designed for professional or hosted environments due to noise and heat.
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How much power does the A3 Air consume?
Approximately 3250W under standard conditions.
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Which coins can it mine?
Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV).
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What algorithm does the SealMiner A3 Air use?
It uses the SHA-256 algorithm.
