Key Takeaways:
Bitdeer launched the Sealminer A4 Ultra Hydro on April 7, 2026, hitting 9.45 J/TH efficiency, among the best figures in the industry. The A4 series, powered by Bitdeer’s SEAL04 chips, improves on the A3 series’ 12.5 J/TH, cutting power costs for miners facing tight post-halving margins. BTDR shares gained approximately 2.8% on launch day, with no shipment dates or pricing disclosed yet. Sealminer A4 Ultra Hydro Delivers 886 TH/s at 9.45 J/TH for Bitcoin MinersThree models make up the A4 series, each targeting different deployment conditions. The A4 Ultra Hydro, the flagship hydro-cooled unit, delivers 886 terahash per second (TH/s) at 8,372.7 watts with a rated efficiency of 9.45 J/TH. The A4 Pro Hydro reaches 680 TH/s at 7,412 watts at 10.9 J/TH. The A4 Pro Air, the air-cooled option, produces 336 TH/s at 3,662.4 watts, also rated at 10.9 J/TH.
Bitdeer operates as a vertically integrated provider, managing chip design, machine production, and data center operations across the United States, Norway, Bhutan, and Ethiopia. The A4 rigs are expected to support both external hardware sales and Bitdeer’s internal self-mining fleet, which the company has been expanding through successive Sealminer deployments.
The A4 launch extends a chip development roadmap that Bitdeer has described as targeting approximately 5 J/TH at the chip level in future generations. The company has previously shown sub-10 J/TH results in chip-level benchmarks under optimized conditions, with the A4 bringing that performance into commercially delivered hardware.
