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• 25 Gigabit LAN
• 25GBase-SR
• LC multi-mode
• up to 328 ft
• 850 nm

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[/properties] [specifications]

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Overview – Cisco SFP-25G-SR-S Transceiver Module

The Cisco SFP-25G-SR-S delivers high-speed 25GBASE-SR connectivity for next-generation data centers. Operating at 850 nm, it supports up to 70 m on OM3 and 100 m on OM4 multimode fiber, with under 1W max power draw—making it ideal for dense, high-efficiency switch fabrics.

Digital Optical Monitoring (DOM) reports real-time power and temperature data, while the SFP28 form factor ensures easy upgrades in high-speed networks. Fully IEEE 802.3by and MSA compliant, it integrates seamlessly into Cisco Catalyst, Nexus, UCS, and other platforms designed for 25G aggregation, spine-leaf interconnects, and MMF-based topologies.

Technical Features

• Speed: 25 Gbps (25GBASE-SR)
• Reach: 100 m on OM4 | 70 m on OM3
• Optics: 850 nm VCSEL, LC duplex
• Diagnostics: DOM (Tx/Rx power, temperature, voltage)
• Power Draw: < 1W (Class 1, low power)
• Hot-Swappable: Yes – zero-downtime insertion/removal
• Operating Temp: 0 °C → 70 °C (commercial)
• Compliance: IEEE 802.3by, SFF-8432, SFP28-MSA, Class 1 laser
• Ideal For: 25G server uplinks, spine-leaf switch fabrics, short-run MMF networks
  

For complete technical details, check the Specifications tab above.