What Makes the Antminer S21j XP Hydro 495T a Strong Choice for Professional Bitcoin Mining?
Hydro cooling is becoming the standard for large-scale Bitcoin mining. Air-cooled units still work for small setups. But when a farm wants high density and stable operation in a hot climate, hydro cooling is the clear choice. The Antminer S21j XP Hydro 495T sits at the top of this category.
The Antminer S21j XP Hydro 495T delivers 495 TH/s of SHA-256 hashrate with a power consumption of 5940W. Its energy efficiency is 12.0 J/TH. This combination of high output and low power per terahash makes it one of the most efficient hydro miners available for professional deployments.
Product Glance
| Specification | Value |
|---|---|
| Model | S21j XP Hyd. |
| Version | 495T-10 |
| Crypto Algorithm | SHA-256 |
| Supported Coins | BTC / BCH / BSV |
| Typical Hashrate | 495 TH/s |
| Power on Wall @35°C | 5940W |
| Power Efficiency on Wall @35°C | 12.0 J/TH |
Hardware Configuration
| Specification | Value |
|---|---|
| Network Connection | RJ45 Ethernet 10/100M |
| Server Size (w/o package) | 430 x 176 x 208 mm |
| Server Size (with package) | 570 x 316 x 430 mm |
| Net Weight | 16.2 kg |
| Gross Weight | 18.3 kg |
Power Supply Requirements
| Specification | Value |
|---|---|
| Phase | 3 |
| Input Voltage | 380~415V |
| Input Frequency Range | 50~60 Hz |
| Input Max Current | 12 Amp |
Cooling System Requirements
| Specification | Value |
|---|---|
| Inlet Coolant Temperature | 20~50°C |
| Coolant Flow | 8.0~10.0 L/min |
| Coolant Pressure | ≤3.5 bar |
| Working Coolant | Antifreeze / Pure water / Deionized water |
| Coolant pH Value | Antifreeze: 7.0~9.0 |
| Pure water: 6.5~7.5 | |
| Deionized water: 8.5~9.5 | |
| Coolant Pipe Connector Diameter | OD10 mm |
Environment Requirements
| Specification | Value |
|---|---|
| Storage Temperature | -20~70°C |
| Operation Humidity (non-condensing) | 10~90% RH |
The S21j XP Hydro 495T is not a beginner machine. It requires a proper three-phase power supply. The coolant loop must be ready before the units arrive. The inlet coolant temperature needs to stay between 20 and 50°C. The flow rate must stay in the 8.0 to 10.0 liters per minute range. Buyers who prepare their site correctly will get stable, high-efficiency hashing from day one.
Why 12 J/TH Matters
Efficiency is everything in Bitcoin mining. The lower the joules per terahash, the less electricity you spend for the same hashrate. At 12.0 J/TH, the S21j XP Hydro 495T is among the most efficient miners currently available. For a farm running dozens or hundreds of these units, that efficiency gap translates directly into lower operating costs and faster ROI.
Who Should Consider the S21j XP Hydro 495T?
| Buyer Type | Why This Miner Fits |
|---|---|
| Large farms with hydro infrastructure | Drops into existing coolant loops with high output |
| Operations in hot climates | Hydro cooling handles high ambient temperatures |
| Buyers upgrading older hydro units | Clear efficiency jump over previous generations |
| UAE and Middle East operators | Built for high-temperature environments with proper cooling |
Why Does Hong Kong Warehouse Stock Enable Fast Global Shipping to the UAE?
The UAE is a major hub for Bitcoin mining in the Middle East. Operators there need reliable hardware supply. But many suppliers in the market do not hold real stock. They take orders first and source units later. This creates delays. For UAE buyers who want fast deployment, this is unacceptable.
Hong Kong warehouse stock means the Antminer S21j XP Hydro 495T units are already in our building. We own the inventory. We can show proof before payment. We can pack and ship immediately after the order is confirmed. Buyers do not wait for factory allocation or production.
Real Stock vs Other Supply Types
| Supply Type | What It Means | Buyer Risk |
|---|---|---|
| Real Hong Kong stock | Units sit in our warehouse now | Low waiting time |
| Factory allocation | Units wait for release from Bitmain | Delivery date can shift |
| Pre-order | Units not produced yet | High waiting risk |
| Unclear stock | Supplier cannot show proof | High trust risk |
The UAE order moved fast because the stock was real. The client confirmed the quantity with us. We checked the units in the warehouse. We packed them. We shipped them. No waiting for a third-party supplier. No uncertain delivery windows.
Why Hong Kong Works Well for UAE Shipments
Hong Kong has strong air freight connections to the Middle East. Multiple carriers operate routes from Hong Kong to Dubai and Abu Dhabi. Customs procedures are well-established. Freight forwarders in Hong Kong handle mining hardware shipments regularly. This experience reduces delays and paperwork problems.
How Buyers Can Verify Our Stock
| Proof Type | What We Provide |
|---|---|
| Warehouse photo | Shows real S21j XP Hydro boxes with current date |
| Warehouse video | Shows inventory quantity and condition |
| Model label check | Confirms exact model and hashrate |
| Packing record | Shows preparation before shipment |
You can also visit our SHIP VIDEO page to see more real shipping records from Miner Source.
How Does DDP Service Simplify International Mining Hardware Delivery?
International shipping can be complicated. Export paperwork. Import clearance. Customs duties. Local delivery coordination. For a busy mining operator, these steps eat time and create uncertainty. DDP service removes this burden from the buyer.
DDP stands for Delivered Duty Paid. The seller handles export, international shipping, import customs clearance, and final delivery to the buyer’s location. The buyer does not deal with customs brokers or freight forwarders. For our S21j XP Hydro shipment to the UAE, we used DDP service to provide a smoother and more convenient delivery.
What DDP Includes
| Step | Who Handles It |
|---|---|
| Export documentation | Miner Source |
| International freight | Miner Source |
| Import customs clearance | Miner Source |
| Duties and taxes | Miner Source (or pre-agreed terms) |
| Final delivery | Miner Source |
DDP is not the cheapest option. But it is the most predictable. The buyer knows the total cost upfront. They know the delivery timeline. They do not need to find a local customs broker. For a high-value order like this one, predictability is worth the extra cost.
Why DDP Matters for UAE Buyers
The UAE has specific import regulations. Working with a local customs broker can take time if the buyer is not familiar with the process. DDP service shifts this responsibility to the seller. We handle the paperwork. We manage the clearance. The buyer receives the miners at their door, ready to install.
| Shipping Method | Typical Transit Time | Best For |
|---|---|---|
| DDP air freight | 3-7 business days | High-value orders, urgent deployments |
| Express | 2-5 business days | Small orders, spare parts |
| Sea freight | 3-6 weeks | Very large orders with flexible timelines |
The UAE order moved by DDP air freight. The client wanted the miners in operation as fast as possible. DDP allowed us to say with confidence: “The units will arrive at your door, cleared and ready to install.”
What Pre-Shipment Preparation Does Miner Source Perform on Every Order?
Mining machines are sensitive equipment. They are heavy. They need careful handling. A cracked casing or a loose internal connection can cause failures on day one. Pre-shipment preparation reduces this risk.
Before shipping any order, we check the model, quantity, physical condition, and packaging protection. For the S21j XP Hydro 495T shipment, the machines were carefully checked and prepared by our team to make sure everything was ready for delivery.
Our Pre-Shipment Checklist
| Check Item | What We Look For |
|---|---|
| Model label | Confirms every unit is S21j XP Hydro 495T |
| Quantity | Matches the order exactly |
| Physical condition | No visible damage to casing or connectors |
| Coolant ports | Protected and secured for transport |
| Packaging integrity | Original boxes intact, no moisture damage |
| Palletization | Stable stacking for air freight |
Hydro miners need extra attention. The coolant ports must be protected. Loose fittings can be damaged during transport. We make sure the cooling connections are covered and secured before the units go into their boxes.
Why Packaging Matters
| Risk During Transport | How Good Packaging Helps |
|---|---|
| Stacking pressure | Strong boxes with corner protection |
| Vibration and drops | Internal foam and secure strapping |
| Moisture exposure | Sealed packaging and moisture barriers |
| Forklift handling | Clear labels and palletized loads |
The S21j XP Hydro units were packed individually, then palletized for air freight. We documented the process. The client received photos of the packed pallets before the shipment left Hong Kong. This transparency builds trust before the miners even arrive.
Looking for Antminer S21j XP Hydro or Other Bitcoin Miners at Wholesale Prices?
The S21j XP Hydro 495T is a top-tier machine. But every mining project has different requirements. Some buyers want air-cooled units. Some need different hashrate levels. Some want to start with a small test batch. Some need hundreds of units right away.
If you need Antminer S21j XP Hydro 495T units or other Bitcoin miners, Miner Source can check current Hong Kong and Shenzhen stock, confirm available quantity, and provide a fresh quote based on your order size and shipping destination. We support wholesale orders and global shipping.
What We Can Supply
| Product Category | Examples |
|---|---|
| Antminer hydro miners | S21j XP Hydro 495T, S21+ Hydro series |
| Antminer air-cooled | S21 series, S19 series |
| WhatsMiner hydro | M73, M63 series |
| WhatsMiner air-cooled | M60, M50, M30 series |
| Accessories | Control boards, PSUs, air switches, coolant parts |
| Liquid cooling infrastructure | CDU systems, containers, cabinets |
Miner Source is not just a seller. We work as a practical supply partner. We have warehouses in Hong Kong and Shenzhen. We serve buyers in North America, Europe, Canada, Dubai, the UAE, and other active mining regions.
When You Contact Us, Please Share
| Detail | Example |
|---|---|
| Model needed | S21j XP Hydro 495T or other model |
| Quantity | 10 units, 100 units, 500+ units |
| Destination country | UAE, USA, Canada, Europe, etc. |
| Shipping preference | DDP air freight, express, sea freight |
| Timeline | Urgent or planned purchase |
This helps us reply faster and give a more useful quote. Miner prices and stock levels change quickly. We recommend checking the latest price and availability before placing an order.
You can reach us through:
- Email: info@minersource.shop
- Website: www.minersource.shop
- Contact Page: Contact
- WhatsApp: +86 13871817151
Conclusion
On August 25, 2026, Miner Source shipped Antminer S21j XP Hydro 495T miners from Hong Kong to the UAE. Each unit delivers 495 TH/s at 12.0 J/TH efficiency. The order moved by DDP service for smooth door-to-door delivery. Every machine was checked and prepared before shipment.
This shipment shows how we operate. Real stock in Hong Kong. Fast global logistics to the UAE. Clear communication. Professional pre-shipment preparation. If you need Antminer S21j XP Hydro units or other Bitcoin mining hardware, we are ready to help.
MinerSource.shop — Real Stock. Fast Shipping. Bitcoin Miner Wholesale Support.
