Bitdeer SealMiner A3 Air (260TH)

260 TH/s SHA-256 at 3,640W and 14 J/TH efficiency on Bitdeer's proprietary SEAL02 chip. ±3 percent hashrate and ±5 percent power tolerance. Released October 2025 by Bitdeer Technologies (NASDAQ: BTDR). This is the standard bin variant of the A3 series. The A3 Pro Air (290 TH/s, 12.5 J/TH, $4,490) is the premium bin from the same chip production line.

Same chassis, cooling, firmware, voltage, and -20 degree cold floor. The only difference is chip binning. A3 Air at 260 TH/s, 3,640W, 14 J/TH, approximately $3,200-$3,500 (this product, standard bin). A3 Pro Air at 290 TH/s, 3,625W, 12.5 J/TH, $4,490 (premium bin). The A3 Pro Air delivers 11.5 percent more hashrate at 10.7 percent better efficiency at approximately 28-40 percent higher CapEx. For fleet buyers, the A3 Air wins when low electricity costs minimize the efficiency gap's daily impact. The A3 Pro Air wins at higher electricity rates or longer deployment horizons where efficiency compounds.

A3 Air at 260 TH/s, 3,640W, 14 J/TH, approximately $3,200-$3,500. S21 XP at 270 TH/s, 3,645W, 13.5 J/TH, $4,051. The S21 XP produces 3.8 percent more hashrate at 3.6 percent better efficiency at higher CapEx. The A3 Air differentiates on cold climate capability (-20°C vs 0°C on S21 XP). For temperate and warm deployments, the S21 XP may win on pure economics. For sub zero climate deployments, the A3 Air's cold floor advantage is worth the efficiency tradeoff.

A3 Air at 260 TH/s, 3,640W, 14 J/TH. S21 PRO at 234 TH/s, 3,510W, 15 J/TH, $3,083. The A3 Air produces 11 percent more hashrate at 6.7 percent better efficiency. Daily profit at $0.08 per kWh: A3 Air at +$2.78 versus S21 PRO at +$1.37. The A3 Air generates approximately twice the daily profit of the S21 PRO at slightly higher CapEx. Plus the -20°C cold floor advantage. For similar CapEx tier, the A3 Air is the technically superior air cooled option.

A3 Air at 260 TH/s, 3,640W, 14 J/TH, approximately $3,200-$3,500. Canaan A16 at 282 TH/s, 3,900W, 13.83 J/TH, approximately $3,705. The A16 produces 8.5 percent more hashrate at 1.2 percent better efficiency at similar CapEx. The A3 Air has -20°C cold floor versus A16's -5°C. For temperate deployments, the A16 wins on raw output. For sub zero climate container deployments, the A3 Air's -20°C capability enables winter operation the A16 cannot sustain without intake heating.

The widest cold tolerance in current air cooled Bitcoin mining hardware. Competing Bitmain S21/S23 series require 0 to 5 degrees minimum. Canaan A16 requires -5 degrees. The A3 series (both A3 Air and A3 Pro Air) operates down to -20 degrees. For container mining deployments in cold climate regions (Canada, Russia, Nordic countries, northern US states, Kazakhstan, Mongolia), winter ambient temperatures regularly drop below -10 to -20 degrees. Conventional 0°C minimum hardware requires intake air heating, which consumes electricity and adds infrastructure cost. The A3 Air eliminates this requirement. Year round operation without heating.

SEAL02 is Bitdeer's second generation proprietary Bitcoin mining ASIC. Used in the A3 Air (standard bin, 14 J/TH, this product) and A3 Pro Air (premium bin, 12.5 J/TH). Chip grade within SEAL02 determines which product receives which chips. SEAL02 replaced SEAL01 (used in A2 series at 16.5 J/TH efficiency). SEAL03 is the next generation powering the upcoming A4 series (9.45-10.9 J/TH). Bitdeer's in house chip design provides hardware control that pure distribution manufacturers do not have, informed by operational data from Bitdeer's own mining fleet.

15.5 kg. MM's spec sheet lists "15 g" (15 grams) which is a typo — a 15 gram miner would be physically impossible given the 365 x 292 x 197 mm chassis containing multiple hashboards and power delivery components. MM's body copy correctly lists 15.5 kg. Every distributor source (Asic Marketplace, Apexto, Yesmining, DCE Miner) confirms 15.5 kg. Update the MM spec sheet from "15 g" to "15.5 kg."

Yes. MillionMiner calculator at $0.08 per kWh: +$2.78 daily ($9.77 revenue minus $6.99 electricity). Monthly: +$83.40. At $0.07 per kWh: +$3.59 daily. At $0.06 per kWh: +$4.42 daily. At $0.04 per kWh industrial rate: +$6.28 daily. Payback at approximately $3,200-$3,500 acquisition: 18-20 months at $0.04 per kWh, 30-34 months at $0.07 per kWh, 41-45 months at $0.08 per kWh. Profitable at any electricity rate below approximately $0.11 per kWh at April 2026 BTC price and difficulty.

220 to 277V single phase AC. No 110V support. At 3,640W on 220V draws approximately 16.5 amps (fits standard 20A circuit). At 240V draws approximately 15.2 amps. At 277V draws approximately 13.1 amps. Industrial and commercial electrical service required. Not compatible with standard North American 110V residential outlets.

75 dB from four cooling fans. Standard industrial ASIC noise comparable to the Bitmain S21 series and Canaan A16. Some distributor sources (X-ON Mining) note the A3 Air runs "3-4 dB quieter than typical air-cooled models" due to Bitdeer's fan and airflow design optimizations, so effective noise may be closer to 71-72 dB under normal operating conditions. Requires dedicated mining space: warehouse, container, or professional hosting. Not suitable for residential or office environments.

All SHA-256 proof of work cryptocurrencies. Bitcoin (BTC) primary. Bitcoin Cash (BCH), Bitcoin SV (BSV), eCash (XEC), Fractal Bitcoin (FB), Peercoin (PPC), Namecoin (NMC), Feathercoin (FTC), and other SHA-256 chains. AuxPoW merged mining through compatible pools. Same coin compatibility as every S21 family miner and Canaan Avalon.

Yes per MM box contents. Built in or included external PSU accepting 220-277V. Connect directly to appropriate voltage outlet. No external PSU to source separately. Standard AC power cable included.

Bitdeer Technologies (NASDAQ: BTDR) is a publicly traded Bitcoin mining company operating across multiple industry segments: proprietary ASIC chip design (the SEAL program), large scale self mining operations across multiple continents, cloud mining services through the Bitdeer platform, and AI infrastructure services. The vertical integration (chip design + manufacturing + mining operations) is shared with Canaan and MARA (through Auradine partnership). Bitdeer's hardware reflects real production environment data from their own mining operations.

Standard industrial ASIC setup. Connect power cable to 220-277V outlet (verify circuit amperage: 20A recommended at 220V). Connect Ethernet cable to router or switch. Find miner IP through Bitdeer IP reporter, router DHCP, or network scanning. Open Bitdeer web interface, configure SHA-256 pool URL and BTC wallet address. Verify hashrate stabilizes at approximately 260 TH/s within 10 to 15 minutes.

Every major SHA-256 pool. Foundry USA, AntPool, F2Pool, ViaBTC, Braiins Pool, Luxor, OCEAN, and all SHA-256 compatible pools. Standard Stratum protocol. No hardware compatibility restrictions.

Bitdeer manufacturer warranty, typically 180 days. BT-Miners' product page contains a copy-paste error referencing "Bitmain" warranty terms on this Bitdeer product; verify actual warranty duration with MillionMiner at purchase. Covers manufacturing defects and hardware failures under normal operating conditions.

Yes. MillionMiner hosting facilities accept Bitdeer SealMiner hardware. At $0.07 per kWh hosted rate: +$3.59 daily profit per unit. At $0.05 per kWh industrial rate: +$5.45 daily. Hosting eliminates facility noise, cooling, and 220V+ infrastructure requirements. The -20 to 45 degree operating range allows container deployment in cold climate facilities without aggressive intake heating, which MillionMiner's hosting operations in northern Europe can leverage.

The A3 Air is the value bin in Bitdeer's A3 generation. Buy if: you plan container mining deployment in sub zero climate regions (Canada, Russia, Nordic countries, northern US states) where the -20 degree cold floor eliminates intake heating requirements, you want Bitdeer SEAL02 silicon at lower CapEx than the A3 Pro Air ($4,490), you value Bitdeer's vertical integration with operational data informing hardware design, or you need more hashrate and better efficiency than the Bitmain S21 PRO ($3,083) at similar CapEx tier. Consider the A3 Pro Air if you want peak efficiency (12.5 J/TH) in Bitdeer's air cooled lineup. Consider the Canaan A16 ($3,705) if your deployment is in temperate climate and raw hashrate (282 TH/s) per dollar matters more than cold floor capability. Consider the Bitmain S21 XP ($4,051) if firmware ecosystem maturity (BraiinsOS+, Vnish) is important.

Within Bitdeer lineup: A3 Pro Air (290 TH/s premium bin, $4,490), A2 Pro Air (260 TH/s previous gen, 14.9 J/TH), A2 Pro Hydro (500 TH/s hydro, 14.9 J/TH, $6,900), A3 Pro Hydro (660 TH/s hydro, 12.5 J/TH, $9,900). Competing air cooled: Bitmain S21 XP (270 TH/s, $4,051), Bitmain S21 PRO (234 TH/s, $3,083), Canaan A16 (282 TH/s, $3,705), Canaan A16XP (300 TH/s flagship). Hydro alternatives: Bitmain S21 XP Hydro (473 TH/s, $6,899), Bitmain S21+ Hyd (319 TH/s, $3,137), Auradine Teraflux AH3880 (600 TH/s, US made). For fleet diversification: Bitmain KS7 (45 TH/s Kaspa), Bitmain L9 (17 GH/s Scrypt).