JL484A HPE Aruba 25G SFP28 LC SR 100M MMF Transceiver

HPE JL484A Aruba 25G SFP28 LC SR 100M MMF Transceiver

HPE JL484A Aruba 25G SFP28 LC SR 100M MMF Transceiver is a high-performance optical networking component engineered for modern high-speed data center and enterprise environments. This compact plug-in optical module is designed to deliver reliable short-range connectivity over multimode fiber infrastructure, enabling efficient 25 Gigabit Ethernet communication between switches, servers, and networking appliances. Built with precision engineering, it ensures stable transmission performance, low latency, and consistent signal integrity across demanding workloads where bandwidth efficiency is critical.

General Information

• Brand: HPE
• Part Number: JL484A
• Device Category: SFP28 Optical Transceiver Module

Technical Specifications

• Form Factor: SFP28 plug-in module
• Connectivity Medium: Multimode fiber (MMF)
• Interface Type: LC duplex connector
• Optical Standard: 25GBASE-SR
• Data Rate: 25 Gbps high-speed transmission
• Protocol Support: 25 Gigabit Ethernet
• Maximum Reach: Up to 100 meters (328 feet) over OM3/OM4 fiber
• Signal Integrity: Optimized for low error rate and stable throughput

Expansion and Connectivity 

• 1 × 25GBASE-SR Ethernet optical interface
• LC duplex multimode fiber connector compatibility
• Hot-swappable installation design for minimal downtime

Compatibility

Supported Aruba Networking Platforms

• Aruba 8320 Series Switches
• Aruba 8325 Series Data Center Switches
• Aruba 8360 Series Modular Switch Platforms
• Aruba 6300M Series Switches (SFP28 uplink support models)
• Aruba 6400 Series Modular Switch Systems
• Aruba CX Series platforms supporting 25G SFP28 ports

Server and Adapter Compatibility

• HPE ProLiant servers equipped with 25GbE SFP28 NICs
• HPE Ethernet adapters supporting 25GBASE-SR optical modules
• Data center blade systems with SFP28 uplink capability

Deployment Cases

• Insert module into compatible SFP28 slot
• Connect LC multimode fiber patch cable
• Verify link establishment through switch interface
• Ensure proper fiber polarity alignment

HPE JL484A Aruba 25G SFP28 LC SR 100M MMF Transceiver 

The HPE JL484A Aruba 25G SFP28 LC SR 100M MMF Transceiver category represents a high-performance optical networking solution designed for modern enterprise, cloud-scale, and data center environments that demand ultra-low latency, high bandwidth density, and reliable short-reach optical connectivity. Built around the SFP28 form factor and optimized for 25 Gigabit Ethernet transmission, this transceiver class is engineered to support next-generation switching and routing infrastructures where scalability, speed, and signal integrity are essential for sustained network performance.

This category is widely deployed in high-density switching architectures, leaf-spine topologies, and virtualization-heavy environments where data throughput requirements exceed traditional 10G limitations. The integration of short-range multimode fiber support ensures efficient transmission over short distances while maintaining cost-effectiveness and energy efficiency in structured cabling systems.

Architectural Role of 25G SFP28 SR Optical Transceivers

Within a modern network architecture, the 25G SFP28 SR transceiver class plays a critical role in bridging access layer switches to aggregation and spine layers. The use of 25G signaling provides a balanced evolution from 10G infrastructure while avoiding the cost and complexity jump associated with 40G or 100G deployments. This makes it a preferred choice for incremental scaling in enterprise data centers.

The architecture supports high port density switching systems, enabling administrators to maximize throughput per rack unit while minimizing physical cabling complexity. The optical interface ensures stable signal transmission across short-reach multimode fiber installations, particularly in environments optimized with OM3 and OM4 fiber cabling standards.

The SR designation in this transceiver class refers to short-range optical transmission optimized for multimode fiber (MMF). The system is engineered to deliver reliable data transmission up to 100 meters depending on fiber quality and installation conditions. This range is ideal for intra-data center communication, including server-to-switch and switch-to-switch interconnects within the same facility.

SFP28 Form Factor and Design 

The SFP28 form factor is a compact, hot-swappable module standard that supports 25Gbps per lane signaling. It maintains physical backward compatibility with SFP+ cages while offering significantly increased throughput. This allows network operators to upgrade existing infrastructure with minimal hardware redesign.

Its compact footprint is essential for high-density switch environments where port utilization efficiency directly impacts overall infrastructure scalability. The reduced size also contributes to improved thermal distribution and optimized airflow within network chassis.

The module integrates a high-speed electrical interface between the host system and the optical engine. This interface ensures minimal signal degradation and supports advanced encoding techniques used in 25G Ethernet standards. The optical interface uses LC duplex connectors, providing industry-standard compatibility and secure fiber termination.

25G Ethernet Performance Characteristics

The transition to 25G Ethernet represents a significant improvement in bandwidth efficiency compared to legacy 10G systems. By doubling and optimizing lane utilization, this transceiver class enables higher data flow without requiring a proportional increase in physical fiber infrastructure.

This performance enhancement is particularly beneficial in environments such as virtualization clusters, distributed storage systems, and high-frequency data analytics platforms where consistent throughput is critical for workload stability.

Low latency is a defining characteristic of this transceiver category. The optical transmission process minimizes serialization delay and ensures rapid packet forwarding across network layers. This is essential for time-sensitive applications including financial trading systems, cloud orchestration, and real-time analytics engines.

Multimode Fiber and Cabling Infrastructure

The HPE JL484A Aruba 25G SFP28 SR module is optimized for multimode fiber infrastructures, particularly OM3 and OM4 cabling standards. These fiber types support high bandwidth over short distances while maintaining signal integrity and minimizing dispersion.

OM3 fiber typically supports 25G transmission up to moderate distances, while OM4 fiber extends performance efficiency further, allowing improved headroom for structured cabling designs in enterprise environments.

The use of LC duplex connectors ensures compatibility with widely deployed fiber patch panels and structured cabling systems. This standardized interface reduces deployment complexity and ensures consistent optical alignment, which is critical for maintaining signal quality across high-density installations.

Signal Integrity and Transmission Stability

Signal integrity is maintained through precise optical alignment and controlled modulation techniques. The transceiver ensures minimal bit error rates, even in densely populated optical environments where crosstalk and attenuation risks are present.

The 100-meter reach capability is optimized for controlled multimode environments. Attenuation is managed through fiber quality selection and adherence to installation best practices, ensuring reliable data transmission across short-range links.

Reliability and Operational Stability

The transceiver is designed for long-term operational stability in continuous-use environments. Its components are engineered to withstand sustained workloads typical of enterprise and cloud data centers.

Lifecycle planning for optical transceivers includes monitoring performance degradation over time and scheduling replacements during maintenance windows to avoid service disruption.

Network Evolution and Future Scalability

The 25G SFP28 SR module represents a strategic transition point in network evolution. It allows organizations to scale performance incrementally while maintaining infrastructure compatibility.

Although designed for 25G operation, this category supports architectural planning for future upgrades to 100G and higher speeds through aggregation and spine layer expansion strategies.

Compatibility Across Networking Ecosystems

The transceiver is designed for compatibility with Aruba switching platforms and other enterprise-grade networking equipment that supports SFP28 interfaces. Its standardized design ensures interoperability across a wide range of networking hardware.

It can be deployed within hybrid network environments where legacy 10G systems coexist with newer 25G infrastructures. This ensures smooth transition paths during network modernization initiatives.