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25 Gigabit LAN25GBase-SRLC multi-modeup to 328 ft850 nm
Description
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.
Properties
| Properties | Cisco SFP-25G-SR-S Transceiver Module |
| Description | The Cisco 25GBASE-SR Module supports a link length of 70/100m on OM3/4 MMF. This module requires RS-FEC on the host ports. |
| Product Family | Cisco 25GBASE SFP28 Modules |
| Product Type | Transceiver Module |
Specifications
| Specifications | Cisco SFP-25G-SR-S Transceiver Module |
| Cable Type | MMF |
| Cable Distance | 2000 (OM3) – 70m 4700 (OM4) – 100m 4700 (OM5) – 100m |
| Max Power Consumption (W) | (1.2) |
| Pull Tab /Bail Latch Color | Beige |
| Wavelength (nm) | 850 |
| Core Size (Microns) | 50.0 |
| Type | 25GBASE-SR 850nm MMF |
| Transmit Power (dBm) | Maximum: +2.4 Minimum: -8.4 (Transmitter and receiver power is on average unless specified.) |
| Receive Power (dBm) | Maximum: +2.4 Minimum:-10.3 (Transmitter and receiver power is on average unless specified.) |
| Transmit and Receive Wavelength (nm) | 840 to 860 |
| Connectors | Dual LC/PC connector |
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