Bitdeer Launches Sealminer A4 Ultra Hydro with Industry-Leading Efficiency

On April 7, 2026, Bitdeer introduced the Sealminer A4 Ultra Hydro, boasting an impressive 9.45 J/TH efficiency level, positioning it as one of the top performers in the mining hardware industry. This latest addition to the A4 series, powered by Bitdeer’s SEAL04 chips, represents a significant advancement over the previous A3 series, which operated at 12.5 J/TH. The improved efficiency of the A4 series is particularly beneficial for miners navigating challenging post-halving margins, allowing them to reduce power costs.

Key Features of Sealminer A4 Ultra Hydro

The Sealminer A4 Ultra Hydro, the flagship model of the series, delivers a remarkable 886 terahash per second (TH/s) at 8,372.7 watts, achieving an efficiency rating of 9.45 J/TH. The A4 Pro Hydro and A4 Pro Air models cater to varying deployment conditions, offering 680 TH/s at 7,412 watts (10.9 J/TH) and 336 TH/s at 3,662.4 watts (10.9 J/TH) respectively.

The Sealminer A4 series, unveiled under Bitdeer’s in-house ASIC division, Sealminer, is a significant step towards direct competition with industry giants like Bitmain and MicroBT. The series, powered by Bitdeer’s latest SEAL04 chips manufactured on advanced process nodes, showcases the company’s commitment to innovation and efficiency.

Bitdeer emphasizes that the power efficiency of the A4 series has a tolerance of plus or minus 5%, while hashrate and power consumption have a tolerance of plus or minus 10%. The A4 Ultra Hydro’s 9.45 J/TH rating represents a substantial improvement over the previous A3 series, which achieved between 12.5 and 14 J/TH.

Each generation of Bitdeer’s mining hardware has been steadily progressing towards the sub-10 J/TH threshold, aimed at reducing electricity costs per bitcoin mined. This is crucial for miners operating in a challenging environment following the 2024 halving event, which reduced block rewards and squeezed profit margins.

In terms of design, the hydro-cooled models in the A4 series are tailored for high-density data center deployments where heat management is critical. These units offer optimized thermal performance and low-noise operation, ensuring machine stability and uptime at scale. The A4 Pro Air model provides a flexible air-cooled option for sites without liquid cooling infrastructure.

Bitdeer’s vertically integrated approach, encompassing chip design, machine production, and data center operations, sets it apart from competitors. By controlling costs and specifications across the supply chain, Bitdeer maintains a competitive edge and ensures quality output. However, this strategy also concentrates R&D risk internally.

The A4 launch aligns with Bitdeer’s chip development roadmap targeting approximately 5 J/TH efficiency at the chip level in future generations. By delivering sub-10 J/TH performance in commercially available hardware, Bitdeer showcases its commitment to technological advancement and operational excellence.

Bitdeer’s A4 rigs are expected to support both external hardware sales and the company’s internal self-mining fleet, expanding its presence in the mining sector. With no specific details regarding pricing, pre-order information, or shipment timelines provided in the announcement, Bitdeer continues to keep the industry guessing about the availability of the A4 series.

As the mining landscape evolves, Bitdeer remains at the forefront of innovation, driving efficiency and performance to new heights in the competitive world of cryptocurrency mining.