Manual-verified specification
495 TH/s at 5,940 W and 12.0 J/TH comes straight from Bitmain's published documentation.
Bitmain
Bitmain Antminer S21j XP Hyd 495 TH/s SHA-256 Miner
495 TH/s of hydro-cooled hashrate at 12 J/TH, documented in Bitmain's own manual.
- Hashrate
- 495 TH/s
- Power
- 5940 W
- Efficiency
- 12 J/TH
- Algorithm
- SHA-256
- Cooling
- hydro
- Released
- Late 2025 / early 2026
Need 10, 50 or 100+ units? Request volume pricing.
What Is the Bitmain Antminer S21j XP Hyd?
The Bitmain Antminer S21j XP Hyd is a hydro-cooled SHA-256 miner rated at 495 TH/s and 5,940 W, giving an efficiency of 12.0 J/TH. It runs on 380–415 V three-phase power and requires an external coolant loop.
The S21j XP Hyd is a mid-tier hydro option: less efficient than the XP+ at 11 J/TH, but often priced accordingly. For sites where power cost is moderate and capital cost dominates the model, a cheaper machine at 12 J/TH can beat a pricier one at 9.5 J/TH over a realistic hold period.
Bitmain's product manual for the 495T-10 version is dated November 2025, while some trackers list a 2026 release. That discrepancy usually reflects regional batch timing rather than two different products.
Bitmain Antminer S21j XP Hyd Specifications
| Manufacturer | Bitmain |
|---|---|
| Model | Antminer S21j XP Hyd |
| Algorithm | SHA-256 |
| Hashrate | 495 TH/s |
| Power consumption | 5940 W |
| Efficiency | 12 J/TH |
| Cooling | Hydro (liquid) cooling |
| Form factor | Standalone hydro miner |
| Chip / platform | Not published — confirm with sales |
| Mineable coins | BTC, BCH, BSV |
| Input voltage | 380–415 V, 3-phase |
| Network interface | Ethernet (RJ45) |
| Dimensions | Not published — confirm with sales |
| Weight | Not published — confirm with sales |
| Noise level | ≈50 dB |
| Release date | Late 2025 / early 2026 |
What Can the Antminer S21j XP Hyd Mine?
A SHA-256 machine: Bitcoin, Bitcoin Cash and Bitcoin SV are all mineable, with BTC the default choice for essentially all commercial operators.
- BTC
- BCH
- BSV
Antminer S21j XP Hyd Power Consumption & Electricity Cost
The Bitmain Antminer S21j XP Hyd is rated at approximately 5940 W at the wall. Electricity is usually the largest recurring cost of running it, so estimate the draw at your own rate before committing to a deployment.
- Cost per hour
- $0.42
- Cost per day
- $9.98
- Cost per month (30 days)
- $299.38
Based on a rated draw of 5940 W at 100% uptime: power in kW × 24 × your rate. Real consumption varies with firmware, ambient conditions and uptime.
Antminer S21j XP Hyd Hydro Cooling Requirements
The Bitmain Antminer S21j XP Hyd is a liquid-cooled unit. It has no onboard fans for the hashboards: heat is carried away by coolant circulating through a cold plate and must be rejected by external infrastructure — typically a dry cooler, cooling tower or plate heat exchanger sized for the site's total heat load.
A hydro deployment needs a closed loop with pumps, manifolds, filtration, quick-disconnect couplings and coolant treatment. Plan for water quality control and leak detection, and match manifold sizing to the number of units per row so flow rate stays inside the manufacturer's window.
The payoff is density and acoustics. Hydro units run far quieter than air-cooled miners, tolerate higher ambient temperatures, and let operators pack substantially more hashrate into the same floor area. Heat recovery is also practical, because the rejected heat leaves the machine as warm water rather than hot air.
Bitmain Antminer S21j XP Hyd Mining Profitability Calculator
Estimate the daily and monthly profitability of the Bitmain Antminer S21j XP Hyd based on its hashrate, power consumption, current Bitcoin price, Bitcoin network difficulty, and your electricity cost.
- Hashrate
- 495 TH/s
- Power draw
- 5940 W
Live profitability data temporarily unavailable.
Live Bitcoin price and network data could not be retrieved.
Estimated profitability for the Bitmain Antminer S21j XP Hyd. Mining profitability is an estimate and can change based on cryptocurrency price, network difficulty, transaction fees, pool fees, miner uptime, hardware performance, and electricity costs. Actual results may vary.
Why Consider the Bitmain Antminer S21j XP Hyd?
Cost-per-terahash play
Often the better buy where electricity is inexpensive and up-front cost drives the decision.
Standard hydro integration
Uses the same three-phase supply and coolant loop design as the rest of the S21 hydro line.
Who Is the Antminer S21j XP Hyd Best For?
- Low-cost-power sites
- Operators expanding an S21 hydro fleet
- Buyers optimising capital cost per terahash
- Mixed-generation farms on a shared loop
Bitmain Antminer S21j XP Hyd vs Comparable Miners
How the Bitmain Antminer S21j XP Hyd compares with the closest alternatives MinersDeals supplies on hashrate, power draw, efficiency and cooling.
| Model | Hashrate | Algorithm | Power | Efficiency | Cooling | Release |
|---|---|---|---|---|---|---|
| Bitmain Antminer S21j XP Hyd | 495 TH/s | SHA-256 | 5940 W | 12 J/TH | Hydro (liquid) cooling | Late 2025 / early 2026 |
| Bitmain Antminer S21 XP+ Hyd | 500 TH/s | SHA-256 | 5500 W | 11 J/TH | Hydro (liquid) cooling | November 2025 |
| Bitmain Antminer S21 XP Hyd | 473 TH/s | SHA-256 | 5676 W | 12 J/TH | Hydro (liquid) cooling | February 2025 |
| Bitmain Antminer S23 Hyd | 580 TH/s | SHA-256 | 5510 W | 9.5 J/TH | Hydro (liquid) cooling | May 2025 |
Efficiency (joules per unit of hashrate) determines how long a machine stays profitable as network difficulty rises, while total power draw determines what electrical and cooling infrastructure you need per unit. A more efficient miner is not automatically the better purchase — price per terahash, availability and the cost of the cooling infrastructure it demands all feed into the decision.
If you are weighing two of these models against each other, send us your electricity rate, target quantity and site cooling type and we will model the comparison against real availability and pricing.
Bitmain Antminer S21j XP Hyd Price
Pricing for the Bitmain Antminer S21j XP Hyd can vary depending on quantity, availability, market conditions and fulfillment requirements. MinersDeals provides individual and volume quotes for qualified buyers, so we publish current pricing on request rather than as a fixed list price.
Buying multiple units? Ask about volume pricing.
Buy Bitmain Antminer S21j XP Hyd
Looking to purchase the Bitmain Antminer S21j XP Hyd? MinersDeals helps individual buyers, mining operators and enterprise customers source specialized hardware. Submit your requirements to receive current availability and pricing.
Wholesale & Bulk Antminer S21j XP Hyd Orders
Planning a larger deployment? Request pricing for 10, 50, 100 or more units. MinersDeals supports hardware procurement for mining farms, hosting providers and infrastructure operators, including staged delivery across multiple sites.
Frequently Asked Questions
What is the S21j XP Hyd efficiency?
12.0 J/TH — 495 TH/s at 5,940 W.
Is it better than the S21 XP+ Hyd?
The XP+ is more efficient (11 J/TH) at similar hashrate. The S21j XP is usually chosen when its price per terahash is lower.
What are its dimensions?
Not confirmed in Bitmain's published manual excerpts. Some third-party listings show figures that appear to be unit errors, so confirm with sales before planning racking.
Does it need three-phase power?
Yes, 380–415 V three-phase per the manual.
How noisy is it?
About 50 dB, typical for a hydro Antminer without hashboard fans.
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