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SFP28SR optical module

SFP28SR optical module

SFP28SR optical module - MADIBA BAY OPTICS

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SFP28 SR optical modules are high-speed, short-reach transceivers designed for 25 Gigabit Ethernet over multimode fiber, offering low power consumption, high port density, and reliable performance.

Overview of SFP28

SFP28 stands for Small Form-factor Pluggable 28 Gigabit, a third-generation module succeeding SFP (1G) and SFP+ (10G) modules . It is primarily used for 25 Gigabit Ethernet (25GbE) and single-lane 32G Fibre Channel applications. SFP28 modules share the same physical form factor as SFP and SFP+, allowing backward compatibility and easy upgrades without replacing existing switch ports . They provide a higher-speed electrical interface capable of 25Gbps, delivering 2.5 times the bandwidth of SFP+ in the same port space . Key features include:

  • Data rate: 25 Gbps
  • Form factor: SFP28, compatible with SFP/SFP+ slots
  • Power consumption: Typically ≤1W, ensuring energy efficiency
  • Hot-swappable: Can be replaced without shutting down the system
  • Digital diagnostics: Real-time monitoring of temperature, optical power, and voltage

SR (Short Reach) Optical Modules

SR modules are designed for short-range optical transmission over multimode fiber (MMF) using an 850nm VCSEL laser . They are ideal for data center racks, top-of-rack switches, and adjacent cabinet connections. Typical specifications include:

  • Transmission distance: Up to 100 meters on OM4 fiber, 70 meters on OM3 fiber
  • Connector type: LC duplex
  • Applications: High-density, low-latency environments such as cloud computing, AI workloads, and real-time analytics SR modules are lower power and cost-effective compared to long-reach (LR) modules, making them suitable for short intra-rack or intra-aisle connections . They are not suitable for campus or long-distance links, which require LR or other long-reach optics.

Advantages and Applications

  • High performance: Supports 25GbE with low latency and high bandwidth
  • Interoperability: Compatible with major vendors like Cisco, Arista, Juniper, Dell, Huawei, and Mellanox
  • Scalability: Supports aggregation (e.g., 4x25G) for future 100G network upgrades
  • Monitoring: Built-in DDM/DOM functions for real-time diagnostics
  • Cost-effective: Lower power and multimode fiber usage reduce operational costs SR optical modules are widely deployed in data centers, enterprise networks, and 5G infrastructure, providing a reliable and efficient solution for high-density, short-distance connections .

Summary

SFP28 SR modules combine the high-speed capabilities of 25GbE with short-reach multimode fiber connectivity, offering a low-power, high-density, and cost-effective solution for modern networking environments. They are ideal for intra-rack or adjacent cabinet connections, while longer distances require LR or other long-reach modules. Their backward compatibility, hot-swappability, and diagnostic features make them a versatile choice for upgrading existing network infrastructure .

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