25G SFP28 to SFP28 Passive Direct Attach Copper Twinax Cable (DAC Cable), Generic Compatible | Length 1m (3ft)~5m (16ft)
Bullet Points:
• Low Power: Only 0.5W max, providing energy-efficient 25G connectivity.
• Reliable Performance: Low loss and minimal crosstalk for stable, high-quality connections.
• Flexible Installation: 21.25mm bend radius for easy routing in tight spaces.
• Cost-Effective: Ideal for very short links within or between racks.
• Standards Compliant: Meets IEEE 802.3 by and SFP28 MSA for compatibility.
SFP-H25G-CU: 25G SFP28 Passive DAC Twinax Cable (Passive, SFP28 to SFP28)
The SFP-H25G-CU 25G SFP28 Passive DAC Twinax Cable is designed for 25GBASE Ethernet, delivering fast and reliable connections. With low power consumption (0.5W), it’s energy-efficient while maintaining high performance. Perfect for short-distance connections within data centers, this cable meets IEEE P802.3by and SFP28 MSA standards, ensuring low signal loss and minimal interference. Its 21.25mm bend radius provides flexibility for easy installation in tight spaces, making it a cost-effective and practical solution for device connectivity.
Specifications
| P/N | SFP-H25G-CUXM | Manufacturer Name | FiberWeek |
| Data Rate | 25Gbps | Form Factor | SFP28 to SFP28 |
| Cable Length | 1m~5m | Cable Type | Passive Twinax |
| Power Consumption | ≤0.5W | Temperature | 0 to 70°C (32 to 158°F) |
| Jacket Material | PVC | Minimum Bend Radius | 35mm |
| Protocols | 25G Ethernet, 5G Wireless | Warranty | 5 Years |
Key Features

Compatibility Testing
Optical transceivers are tested with various switches to ensure broad compatibility and reliable performance under different network configurations. The extensive testing ensures integration and functionality in a variety of network environments.
Chip Functionality
The chip of an optical transceiver is the core component responsible for signal processing and data transmission. It converts electrical signals into optical signals for transmission over fiber optic cables and vice versa. High-performance chips ensure efficient data transfer, low latency, and reliability, which are essential for the overall functionality of optical transceivers in modern communication networks

Related Products
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| 10G SFP+ Passive DAC | 25G SFP28 Passive DAC | 50G SFP56 Passive DAC | 100G QSFP28 Passive DAC | |
| Data Rate | 10Gbps | 25Gbps | 50Gbps | 100Gbps |
| Form Factor | SFP+ to SFP+ | SFP28 to SFP28 | SFP56 to SFP56 | QSFP28 to QSFP28 |
| Temperature | 0 to 70°C (32 to 158°F) | 0 to 70°C (32 to 158°F) | 0 to 70°C (32 to 158°F) | 0 to 70°C (32 to 158°F) |
| Power Consumption | ≤0.1W | ≤0.5W | ≤0.1W | ≤0.5W |
| Protocols | 10G Gigabit Ethernet | 25G Ethernet Compliant | 50 Gigabit Ethernet | 100 Gigabit Ethernet |
Global Certification
Fiberweek is committed to continuously enhancing our product compliance processes to support long-term sustainable growth. We guarantee that our products meet industry standards, ensuring superior quality and reliability.
Important Note: Using third-party transceivers will not affect your network equipment warranty. Manufacturers clearly state that warranty support remains the same when using compatible products.
Frequently asked questions
If you have placed the order as a guest or just placed an offline order, you can start a return through the “Product Return Request”.
A:If your return is due to an error on our part (you received an incorrect or defective item, etc.), FiberWeek will cover all the shipping cost. Otherwise, the return shipping cost should be born by your own.
Usually, international orders may cause custom duties on import and export. If the items are returned from abroad, and the return is due to our error (you received an incorrect or defective item, etc.), we will cover the custom duties.
A:Usually you can save the shipping fees by printing shipping label we provide on “Return/Replace Review” page when the return/replace request is approved. If you don’t find that shipping label, don’t worry, we will refund you the shipping fees when we received the item(s).
A:Refund is usually processed on Tuesday and Friday after we received the returning items, and you will receive the money within 1 week, depending on the refund method that you use.
A:In most cases, we will refund you the returned items in the same way you paid for them. Also, You can contact your account manager to help you keep the money as “reserved amount” in FiberWeek and spend them for your future FiberWeek order.
Resources
- Datasheet
- Installation Guide
- Compatibility Matrix






