844480-B21 HPE 25GB SFP28 to SFP28 5m Direct Attach Copper Cable

Applications of HPE 25GB SFP28 to SFP28 DAC Cables

The HPE 844480-B21 DAC cable is widely used in various networking scenarios due to its performance and reliability. Typical applications include:

Data Center Connectivity

These cables are extensively used to interconnect top-of-rack (ToR) switches and servers within data centers. Their 25GbE speed supports bandwidth-intensive tasks like cloud computing, virtualization, and storage traffic. Using direct attach copper reduces the complexity of optical cabling, allowing for faster deployment and lower maintenance costs.

High-Performance Computing (HPC)

HPC environments demand ultra-low latency and high throughput. The HPE 844480-B21 DAC cable ensures data flows efficiently between compute nodes and storage clusters. Its copper design provides consistent signal quality over short distances, which is critical for scientific simulations, AI training, and big data analytics.

Enterprise Networking

In enterprise networks, the HPE 25GB SFP28 DAC cables support aggregation and distribution layers, ensuring seamless connectivity between servers and switches. These cables also simplify cabling infrastructure, reduce heat generation, and lower energy costs compared to optical solutions.

Reliability and Durability

HPE DAC cables are built to withstand frequent handling, bending, and installation cycles. The sturdy copper conductors and reinforced connectors provide long-term performance stability, making them ideal for high-density environments.

Energy Efficiency

By eliminating the need for optical transceivers, DAC cables reduce power consumption in networking equipment. This leads to lower energy bills and contributes to environmentally sustainable data center operations.

Subcategories of HPE SFP28 to SFP28 Cables

The HPE 844480-B21 falls under the broader category of SFP28 to SFP28 DAC cables, which include multiple variations based on length, active or passive design, and supported data rates. Understanding these subcategories can help IT professionals select the best option for their needs:

Passive Direct Attach Copper (DAC) Cables

Passive DAC cables, such as the HPE 844480-B21, require no additional power and are ideal for short-range connections up to 7 meters. They are cost-effective and simple to deploy.

Active Direct Attach Copper (AOC) Cables

Active DAC cables contain embedded electronics that boost signal strength, allowing for longer cable runs (up to 15 meters or more) without signal degradation. These are used in larger data center racks where extended reach is necessary.

Various Cable Lengths

SFP28 DAC cables are available in multiple lengths, typically ranging from 0.5 meters to 15 meters. Choosing the correct length helps optimize rack organization, airflow, and signal integrity.

Compatibility and Standards

HPE Networking Devices

The HPE 844480-B21 is fully compatible with HPE networking devices, including Aruba and ProLiant series servers. Compatibility ensures that the cable works seamlessly with switch-to-server, switch-to-switch, and storage interconnects without requiring additional firmware or configuration adjustments.

Industry Standards

These DAC cables adhere to the SFP28 Multi-Source Agreement (MSA) standard, guaranteeing interoperability with other compliant devices. Standards compliance ensures network stability, high signal integrity, and reliable data transmission at 25GbE speeds.

Performance Considerations

Signal Integrity and Low Latency

Direct Attach Copper cables like the HPE 844480-B21 maintain superior signal integrity over short distances. This low-latency performance is critical for applications such as high-frequency trading, AI model training, and virtualization workloads.

Thermal Management

Copper cables generate less heat compared to optical transceivers and fiber setups. Proper cable routing and management further enhance airflow within racks, preventing network equipment from overheating and improving overall system reliability.

Scalability

As network demands increase, 25GB DAC cables provide a scalable solution for upgrading from 10GbE infrastructure without significant changes to existing cabling. This enables businesses to achieve higher bandwidth without a complete network overhaul.

Installation and Maintenance Tips

Proper Handling

Always handle DAC cables by the connector ends, avoiding excessive bending or twisting. This ensures longevity and prevents damage to the copper conductors.

Cable Management

Use cable management tools such as Velcro straps, cable trays, and raceways to organize DAC cables efficiently. Proper management reduces clutter, improves airflow, and makes future upgrades easier.

Regular Inspection

Periodically inspect cables for wear, connector damage, or loose connections. Replacing damaged cables promptly ensures continuous network performance and prevents potential downtime.

HPE 844480-B21 for Your Network

The HPE 844480-B21 25GB SFP28 DAC cable combines speed, reliability, and cost-effectiveness, making it an essential component for modern high-speed networks. Its plug-and-play compatibility, low-latency performance, and durable construction make it ideal for data centers, enterprise networks, and HPC environments. By choosing HPE-certified DAC cables, organizations can ensure consistent network performance, minimize maintenance, and simplify upgrades while maintaining adherence to industry standards.

Choosing the Right DAC Cable

When selecting a DAC cable, consider the required data rate, cable length, and device compatibility. The HPE 844480-B21 5-meter passive DAC cable is ideal for short-range, high-speed connections. For longer distances, active DAC variants may be more appropriate, while still maintaining SFP28 compatibility.