SFP-25G-SR-S – 25GBASE-SR SFP28 – 850nm MMF – 100m OM4
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SFP-25G-SR-S Description
The SFP-25G-SR-S is a Cisco 25GBASE-SR SFP28 transceiver for short multimode links inside a data center. The module runs at 850 nm on dual LC/PC connectors, reaches 70 m on OM3 and 100 m on OM4 or OM5 fiber, and draws up to 1.2W. The module requires RS-FEC on the host port, and patch cords with APC connectors are not supported.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
SFP-25G-SR-S |
|
Product type |
25GBASE-SR SFP28 transceiver |
|
Data rate |
25 Gigabit Ethernet |
|
Fiber type |
Multimode fiber |
|
Nominal wavelength |
850 nm |
|
Reach on OM3 MMF |
70 m |
|
Reach on OM4 or OM5 MMF |
100 m |
|
Connector type |
Dual LC/PC |
|
Host FEC requirement |
RS-FEC required on host ports |
|
Maximum power consumption |
1.2W |
|
Pull tab or bail latch color |
Beige |
Application Scenarios
A leaf switch in a data center connects servers in the same row over OM4 multimode fiber, and the module covers the 100 m run at 25 Gigabit Ethernet.
On a Cisco UCS 6536 Fabric Interconnect, the module fills an SFP28 port and links a blade or rack server chassis over short 850 nm multimode cabling.
Product Comparison
|
Parameter |
SFP-25G-SR-S | |||
|---|---|---|---|---|
|
Data rate |
25G |
25G |
10G and 25G |
10G and 25G |
|
Media type |
Multimode fiber |
Multimode fiber |
Multimode fiber |
G.652 single-mode fiber |
|
Nominal wavelength |
850 nm |
850 nm |
850 nm |
1310 nm |
|
Published reach |
70 m on OM3; 100 m on OM4 or OM5 |
20 m on OM3; 30 m on OM4 or OM5 |
300 m on OM3; 400 m on OM4 or OM5 |
10 km over G.652 SMF |
|
Host FEC requirement |
RS-FEC required on host ports |
RS-FEC required on host ports |
RS-FEC required for full-reach 25G operation |
RS-FEC required on host ports for 25G operation |
|
Maximum power consumption |
1.2W |
1.2W |
1.2W |
1.3W |
SFP-25G-SR-S carries 25G over 850 nm multimode fiber to 70 m on OM3 and 100 m on OM4 or OM5, while SFP-25G-SL on the same fiber stops at 20 m on OM3 and 30 m on OM4 or OM5. Multimode runs longer than that move to SFP-10/25G-CSR-S, which reaches 300 m on OM3 and 400 m on OM4 or OM5 under Cisco’s conditions and also runs at 10G. Links on G.652 single-mode fiber need SFP-10/25G-LR-S, which covers 10 km at 1310 nm. All four modules need RS-FEC on the host port for 25G operation.
Ordering Checklist
- Fiber and connector: Use OM3, OM4 or OM5 multimode fiber with LC/PC or LC/UPC patch cords, not APC. APC patch cords are not supported on this optic, and single-mode fiber needs a different SFP28 module.
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | SFP-25G-SR-S | Product type | 25GBASE-SR SFP28 transceiver |
| Cisco ordering description | 25GBASE-SR SFP28 Module for MMF | Data rate | 25 Gigabit Ethernet |
| Nominal wavelength | 850 nm | Transmit wavelength range | 840 to 860 nm |
| Receive wavelength range | 840 to 860 nm | Fiber type | Multimode fiber |
| Connector type | Dual LC/PC | OM3 reach | 70 m with 2000 MHz*km modal bandwidth |
| OM4 reach | 100 m with 4700 MHz*km modal bandwidth | OM5 reach | 100 m with 4700 MHz*km modal bandwidth |
| Transmit power range | +2.4 to -8.4 dBm average | Receive power range | +2.4 to -10.3 dBm average |
| Host FEC requirement | RS-FEC required on host ports | FCoE support condition | Supported with appropriate host software support |
| UCS 6536 support example | Cisco UCS 6536 Fabric Interconnect spec sheet lists SFP-25G-SR-S under SFP28 25-Gbps transceivers | Platform support boundary | Cisco Transceiver Module Group Compatibility Matrix should verify the exact host and software support |
| Core size | 50.0 microns | Optical type | 25GBASE-SR 850nm MMF |
| Patch-cord rule | PC or UPC connectors supported; APC connectors not supported | Pull tab or bail latch color | Beige |
| Standards references | SFF-8402; SFF-8472; IEEE 802.3; IEEE P802.3by; IEEE P802.3cc | Maximum power consumption | 1.2W |
| Form factor | SFP28 | Operating temperature | 0 to 70°C commercial range |
| Storage temperature | -40 to 85°C |
Quality Certifications
Customer Reviews
Questions & Answers
-
What is the reach of SFP-25G-SR-S by fiber type?
-
What operating temperature range does SFP-25G-SR-S support?
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Does SFP-25G-SR-S support FCoE?
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Can SFP-25G-SR-S connect to a QSFP-100G-SR4-S port?
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Does SFP-25G-SR-S need FEC on the host port?
-
Which connector and cable grade does SFP-25G-SR-S need?
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