SFP28-25G-SR-NOF Dell SFP28 SR Transceiver Module 25GBE, 850nm, 100m MMF Duplex LC

Dell SFP28-25G-SR-NOF 25GbE SFP28 SR Transceiver Module 

The Dell SFP28-25G-SR-NOF 25GbE SFP28 SR Transceiver Module 850nm 100m MMF Duplex LC is a high-performance optical networking solution designed for modern data center environments requiring ultra-fast, low-latency, and energy-efficient connectivity. Built to support 25 Gigabit Ethernet over multimode fiber, this optical transceiver module is engineered for scalability, reliability, and seamless integration into enterprise switching and server infrastructures. As part of the advanced SFP28 transceiver family, it delivers enhanced bandwidth density compared to legacy SFP+ 10GbE modules while maintaining backward compatibility in supported environments.

This optical transceiver is widely deployed in high-speed switching fabrics, cloud computing infrastructures, enterprise aggregation layers, and high-performance computing clusters. Its compact SFP28 form factor allows network architects to maximize port density while minimizing power consumption and thermal output, making it an essential component in next-generation networking deployments.

High-Speed 25GbE Optical Networking Architecture

Next Generation SFP28 Technology

The SFP28 interface used in the Dell SFP28-25G-SR-NOF module is an evolution of the SFP+ standard, delivering a fixed 25Gbps data rate per lane. This enables significantly improved throughput for modern workloads including virtualization, containerized applications, AI workloads, and large-scale data replication systems. The module is engineered to maintain signal integrity at high speeds while ensuring minimal latency across network paths.

25GBASE-SR IEEE Compliance

Compliant with IEEE 802.3by 25GBASE-SR standards, this transceiver ensures interoperability with a wide range of enterprise switches and network interface cards. The standardized design allows seamless deployment across multi-vendor environments, supporting interoperability in heterogeneous network infrastructures without sacrificing performance or stability.

850nm VCSEL Optical Transmission Technology

Vertical-Cavity Surface-Emitting Laser (VCSEL)

The module utilizes 850nm VCSEL laser technology optimized for multimode fiber transmission. VCSEL technology provides high modulation speeds, low power consumption, and improved signal efficiency over short-reach optical links. This makes it ideal for intra-data center connectivity where distances typically remain within 100 meters.

Stable Short-Reach Transmission

Designed specifically for short-reach optical communication, the 850nm wavelength ensures stable signal propagation through OM3 and OM4 multimode fiber cables. This allows consistent performance in dense rack-to-rack and switch-to-server connections where high bandwidth and low latency are critical.

100 Meter Multimode Fiber Connectivity

Optimized for OM3 and OM4 Fiber

The Dell SFP28-25G-SR-NOF module supports transmission distances up to 70 meters on OM3 fiber and up to 100 meters on OM4 fiber. This flexibility ensures compatibility with a wide range of existing fiber infrastructure deployments while enabling future scalability in high-density networking environments.

Duplex LC Connector Interface

Equipped with a duplex LC connector, the module ensures secure, low-loss optical connectivity. The LC interface is widely adopted in enterprise and data center environments due to its compact size and reliable physical alignment characteristics. It supports efficient bidirectional communication over paired fiber strands.

Enterprise Data Center Applications

Cloud Computing Infrastructure

This transceiver is widely used in cloud computing environments where high bandwidth aggregation and low latency communication are required. It enables fast data exchange between compute nodes, storage arrays, and top-of-rack switches, ensuring optimal performance in distributed cloud architectures.

High-Performance Computing Clusters

In HPC environments, the Dell SFP28-25G-SR-NOF plays a critical role in supporting tightly coupled workloads that require rapid inter-node communication. Its low latency characteristics help improve simulation accuracy, scientific modeling, and large-scale computational tasks.

Enterprise Virtualization Networks

Virtualized environments benefit significantly from 25GbE connectivity, as virtual machines and containers generate substantial east-west traffic. This transceiver ensures stable and high-throughput connectivity between hypervisors, storage systems, and network switches.

Hardware Design and Performance Efficiency

Low Power Consumption Architecture

The module is designed with energy efficiency in mind, consuming significantly less power compared to higher-speed optical modules such as 40G or 100G alternatives. This reduces operational costs and contributes to improved thermal management within dense networking chassis.

Hot-Swappable Capability

Hot-swappable functionality allows network administrators to install or replace the module without shutting down the system. This ensures continuous uptime and simplifies maintenance operations in mission-critical environments.

Digital Diagnostic Monitoring (DDM)

The integrated DDM functionality provides real-time monitoring of key performance parameters such as optical power, temperature, voltage, and laser bias current. This enables proactive network maintenance and helps prevent unexpected link failures.

Compatibility and Interoperability

Dell Networking Switch Integration

This transceiver is optimized for use with compatible networking switches and platforms. It integrates seamlessly into Dell’s enterprise switching ecosystem, ensuring reliable performance and simplified configuration in managed network environments.

Multi-Vendor Support Capability

In addition to Dell systems, the module is engineered for compatibility with a wide range of third-party switches and network interface cards that support SFP28 25GbE standards. This flexibility allows organizations to deploy mixed vendor architectures without compromising interoperability.

Fiber Optic Characteristics and Signal Integrity

Multimode Fiber Optimization

The module is specifically optimized for multimode fiber (MMF) infrastructure, supporting both OM3 and OM4 cabling types. These fiber categories are commonly used in enterprise data centers due to their balance of cost efficiency and high bandwidth capability.

Signal Attenuation and Link Stability

Engineered to minimize signal loss over distance, the transceiver maintains strong optical signal integrity across the supported 100-meter range. Advanced modulation and error correction techniques ensure stable data transmission even in high-density cabling environments.

Link Budget Efficiency

The carefully designed optical power budget ensures that the module maintains reliable communication across supported distances while accommodating typical connector and splice losses within structured cabling systems.

Proper Fiber Handling Practices

To maintain optimal performance, fiber connectors must be kept clean and free from contamination. Proper handling of LC connectors ensures minimal insertion loss and long-term reliability of the optical link.

Rack Density Optimization

The compact design supports high port density within switches, enabling data centers to maximize bandwidth per rack unit while minimizing physical footprint and cabling complexity.

Thermal Performance and Environmental Stability

Operating Temperature Range

The module is designed to operate reliably in typical data center environmental conditions, maintaining performance stability across a controlled temperature range. This ensures consistent behavior in both standard and high-density deployments.

Heat Dissipation Efficiency

Low power consumption contributes to reduced heat generation, which is critical in densely populated switching environments where thermal buildup can impact overall system reliability.

Reliability and Long-Term Operational Stability

Industrial-Grade Component Design

The transceiver is constructed using high-quality optical and electronic components designed for continuous operation in enterprise environments. This ensures long-term durability and reduced failure rates.

Error-Free Data Transmission

Advanced signal processing and optical calibration techniques help ensure low bit error rates, making the module suitable for mission-critical applications requiring high data integrity.

Use Cases in Modern Networking Architectures

Leaf-Spine Data Center Topologies

In leaf-spine architectures, the module is commonly deployed for high-speed interconnects between leaf switches and spine layers, ensuring non-blocking bandwidth and predictable latency.

Storage Area Networks

The high throughput of 25GbE connectivity makes it ideal for storage area networks where large data volumes must be transferred quickly between storage arrays and compute nodes.

Content Delivery and Edge Computing

Edge computing environments benefit from the module’s compact size and high-speed capability, enabling efficient content delivery and real-time processing closer to end users.

Standards Compliance and Industry Certification

IEEE and MSA Standards

The module adheres to Multi-Source Agreement (MSA) standards for SFP28 transceivers, ensuring broad compatibility and consistent performance across certified networking hardware platforms.

Quality Assurance Testing

Each unit undergoes rigorous testing for optical performance, thermal stability, and signal integrity to ensure compliance with enterprise-grade reliability standards.

Advanced Network Optimization Benefits

Bandwidth Scaling Advantages

By delivering 25GbE per port, this transceiver enables efficient scaling of network bandwidth without requiring major infrastructure redesigns. It serves as a cost-effective upgrade path from 10GbE networks.

Reduced Congestion in High-Traffic Environments

The increased throughput significantly reduces network congestion in environments with heavy east-west traffic, improving application responsiveness and system performance.

Improved Resource Utilization

Higher link speeds allow for better utilization of compute and storage resources, reducing bottlenecks and improving overall infrastructure efficiency.