Cisco SFP-25G-SR-S Compatible 25GBASE-SR SFP28 Transceiver
Cisco compatible SFP-25G-SR-S - Key Features
- Compatibility: Cisco
- Media Type: Multi-Mode Fiber (MMF) -OM3/OM4/OM5
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 100 m
- Average Link Budget: 5.3 dB
- Tx Wavelength: 850 nm
- Supported Data Rate: 8.5 Gbps - 25.78 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Cisco SFP-25G-SR-S Price
In Stock - Ships Next Business DayCisco compatible SFP-25G-SR-S Specifications
Form Factor | SFP28 |
Media Type | Multi-Mode Fiber (MMF) -OM3/OM4/OM5 |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 100 m |
Average Link Budget | 5.3 dB |
TX Wavelength | 850 nm |
RX Wavelength | 850 nm |
Supported Data Rate | 8.5 Gbps - 25.78 Gbps |
Supported Ethernet Applications | 10G Ethernet (10.31Gbps), 25G Ethernet (25.78Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | VSCEL Laser |
Average Launch Power (Min) Each Lane | -5 dBm |
Average Launch Power (Max) Each Lane | 2.4 dBm |
Extinction Ratio (Min) | 3 dB |
Receiver Type | PIN photodiode |
Rx Wavelength Bandwidth | 20 nm |
Average Receiver Sensitivity (Min) Each Lane | -10.3 dBm |
Average Receiver Sensitivity (Max) Each Lane | 2.4 dBm |
Receiver Overload | 2.4 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 0.3 W |
Power | +3.3V single power supply |
Compliance | SFF-8432, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, RoHS, SFF-8431, SFF-8472, SFP28 MSA |
Cisco compatible SFP-25G-SR-S Datasheet
v3Complete technical specifications and product details
Cisco compatible SFP-25G-SR-S Description
Cisco-coded version of the EdgeOptic 25G-SFP28-100 multi-vendor 25GBASE-SR SFP28 transceiver. The SFP-25G-SR-S compatible matches the original Cisco SFP-25G-SR-S optical and electrical specification for short-reach 25 Gigabit Ethernet over multimode fiber. The -S suffix is Cisco's standalone ordering convention; SFP-25G-SR-S= is the spare PID for the same module ordered separately.
850 nm VCSEL transmitter, PIN photodiode receiver, TX power −5 to +2.4 dBm, RX sensitivity better than −10.3 dBm, 5.3 dB link budget. Reach is 100 m on OM4, 100 m on OM5, and 70 m on OM3 with an LC/UPC duplex connector. Data rate is 25.78 Gbps per IEEE 802.3by Clause 112, and the module requires RS-FEC via Clause 91 (RS(528,514)) on the host port. FC-FEC (Firecode) is not sufficient for SFP-25G-SR-S operation; the host must present RS-FEC at link bring-up.
The electrical interface follows SFF-8431 and SFF-8432 for the SFP28 cage. Digital diagnostics are SFF-8472 compliant, surfacing temperature, supply voltage, TX bias, TX power, and RX power through standard NX-OS and IOS XE transceiver inspection commands. Power dissipation is 0.3 W and the module operates across 0 to 70 °C.
EEPROM is programmed with Cisco-recognized vendor identification, which means NX-OS and IOS XE accept the module as a supported transceiver at link-up without requiring the service unsupported-transceiver command. Works on Cisco Nexus 9000 series, Cisco UCS fabric interconnects, and Catalyst 9500 series platforms. Verify per-chassis and per-release qualification against Cisco's Transceiver Module Compatibility Matrix at tmgmatrix.cisco.com.
The SFP-25G-SR-S is a 25G-only module; Cisco's CSR-S dual-rate 25G SFP28 sibling covers 10G/25G fleet-migration deployments. Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For Nexus 9000 platform rollouts or Catalyst 9500 compatibility-matrix questions, contact our sales team.
Frequently Asked Questions
Will the Cisco SFP-25G-SR-S compatible work on Nexus 9000 without the service unsupported-transceiver command?
Yes. EdgeOptic codes Cisco compatibles with Cisco-recognized EEPROM, so NX-OS accepts the SFP-25G-SR-S as a supported transceiver at link-up and during show inventory output without requiring the service unsupported-transceiver command. The same applies on IOS XE for Catalyst 9500 hosts and UCS fabric interconnects. Verify per-chassis qualification against Cisco's Transceiver Module Compatibility Matrix (tmgmatrix.cisco.com).
Does the SFP-25G-SR-S require RS-FEC on the host port?
Yes. SFP-25G-SR-S requires RS-FEC (Clause 91, RS(528,514)) on the host-side 25G port per IEEE 802.3by Clause 112. FC-FEC (Firecode) is not sufficient to bring the link up. Verify the host port FEC profile is set to RS-FEC before inserting the module; some platforms configure FEC within policy groups that may default to alternative FEC modes.
What is the difference between SFP-25G-SR-S and Cisco's CSR-S dual-rate sibling?
SFP-25G-SR-S is a 25G-only SR module for 25GBASE-SR ports. Cisco's CSR-S dual-rate sibling operates at both 10GBASE-SR and 25GBASE-SR with extended OM3 reach, intended for 10G-to-25G fleet migration scenarios where a single SKU needs to cover both link speeds. The SR-S is the right choice for pure 25G deployments. For the exact CSR-S part number, reach figures, and platform qualification, consult Cisco's 25GBASE SFP28 Modules Data Sheet.
Is SFP-25G-SR-S= the same module as SFP-25G-SR-S?
Yes. SFP-25G-SR-S= is Cisco's spare PID (standalone orderable code) for the same SFP-25G-SR-S module. The trailing '=' suffix is Cisco's ordering convention indicating the part is ordered separately rather than bundled with a chassis. Optical and electrical specification, EEPROM coding, and platform compatibility are identical to the SFP-25G-SR-S.