SFP-25G-SR-S – 25GBASE-SR SFP28 – 850nm MMF – 100m OM4
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SFP-25G-SR-S Description
SFP-25G-SR-S is a Cisco 25GBASE-SR SFP28 transceiver for 25 Gigabit Ethernet links over 850 nm multimode fiber. Cisco lists it as the MMF SR optic with 70 m reach on OM3, 100 m reach on OM4 or OM5, RS-FEC required on host ports, dual LC/PC connectivity, and 1.2W maximum power consumption.
The ordering distinction is the short-reach 25G multimode class. SFP-25G-SR-S is the standard SR-S order line for 25G MMF runs, while SFP-25G-SL is the shorter 20/30 m MMF option and SFP-10/25G-CSR-S is the longer dual-rate CSR option for 10G or 25G links.
Quote review should keep the exact SFP-25G-SR-S PID aligned with Cisco host support, SFP28 port FEC capability, OM3/OM4/OM5 fiber grade, LC patch-cord polish, FCoE host-software requirement if needed, and the target platform software release.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
SFP-25G-SR-S |
|
Brand |
Cisco |
|
Product family |
Cisco 25GBASE SFP28 modules |
|
Product type |
25GBASE-SR SFP28 transceiver |
|
Ethernet 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 |
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
SFP-25G-SR-S fits Cisco-supported SFP28 ports where the fiber path is short multimode cabling and the design needs a 25GBASE-SR optic rather than a DAC or AOC assembly.
Use this PID when an existing BOM, spares pool, or platform guide calls for the Cisco SR-S 25G MMF optic. The receiving check should not collapse it into SL, CSR-S, LR-S, or an AOC length variant.
The link plan should include host-port RS-FEC support and a Cisco compatibility check before staging. A port that only proves physical SFP28 fit is not enough evidence for this optic.
Product Comparison
|
Parameter |
SFP-25G-SR-S | |||
|---|---|---|---|---|
|
Product family |
Cisco 25GBASE SFP28 modules |
Cisco 25GBASE SFP28 modules |
Cisco 25GBASE SFP28 modules |
Cisco 25GBASE SFP28 modules |
|
Product type |
25GBASE-SR SFP28 transceiver |
25GBASE-SL SFP28 transceiver |
10/25GBASE-CSR SFP28 transceiver |
10/25GBASE-LR SFP28 transceiver |
|
Form factor |
SFP28 |
SFP28 |
SFP28 |
SFP28 |
|
Ethernet rates |
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 with Cisco conditions |
10 km over G.652 SMF |
|
Host FEC note |
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 |
|
Pull tab or bail latch color |
Beige |
Purple |
Peach |
Blue |
|
Ordering description |
25GBASE-SR SFP28 Module for MMF |
25GBASE-SL SFP28 Module for MMF |
10/25GBASE-CSR SFP28 Module for MMF |
10/25GBASE-LR SFP28 Module for SMF |
- In a SFP-25G-SR-S vs SFP-25G-SL comparison, both rows stay on 850 nm multimode SFP28 optics, but the table changes from 70/100 m SR reach to 20/30 m SL reach.
- The SFP-25G-SR-S difference from SFP-10/25G-CSR-S is reach and speed scope: SR-S is a 25G SR optic, while CSR-S is dual-rate and reaches farther on OM3, OM4, or OM5 with Cisco conditions.
- SFP-25G-SR-S vs SFP-10/25G-LR-S is a media and distance comparison because LR-S moves the order from MMF to G.652 SMF and from short-reach cabling to a 10 km reach class.
- For which model to choose, match the required fiber type, reach table, port FEC support, Ethernet rate, and Cisco host-compatibility result before substituting any SFP28 SKU.
Selection Guide
1. Choose it for standard 25G SR MMF links
Select SFP-25G-SR-S when the approved Cisco host uses an SFP28 port and the fiber path fits the SR table for OM3, OM4, or OM5 multimode cabling.
2. Keep SL separate from SR-S
Use SFP-25G-SL only when the design intentionally calls for the shorter Cisco SL reach class. It should not replace SFP-25G-SR-S on a 70 m OM3 or 100 m OM4/OM5 route.
3. Move to CSR-S when the MMF run is longer
Order SFP-10/25G-CSR-S instead when the same multimode plant needs the longer Cisco CSR reach or a 10G and 25G dual-rate optic.
4. Change media for LR-S
Use SFP-10/25G-LR-S only when the design moves to G.652 single-mode fiber and the link is planned against Cisco’s 10 km LR table.
Ordering Checklist
|
Check Item |
What to Confirm |
Procurement Risk Controlled |
|---|---|---|
|
Exact product ID |
Quote line, purchase order, and receiving label show SFP-25G-SR-S |
Prevents substitution with SL, CSR-S, LR-S, DAC, or AOC parts |
|
Cisco host support |
Target platform, SFP28 port, and software release are checked in Cisco compatibility documentation |
Keeps the optic decision tied to an approved Cisco host rather than form factor alone |
|
Multimode reach |
Planned fiber is OM3 at 70 m or OM4/OM5 at 100 m maximum |
Avoids ordering SR-S for a run that belongs in CSR, LR, DAC, or AOC planning |
|
RS-FEC readiness |
Host ports can run RS-FEC for this 25G SR module |
Reduces turn-up risk on a link whose official table requires host-port FEC |
|
Connector polish |
LC patch cords use PC or UPC connectors and avoid APC connectors |
Matches Cisco’s connector rule for this SFP28 optical connection |
|
FCoE requirement |
Any FCoE design has appropriate host software support |
Prevents treating FCoE as automatic without the Cisco host-software condition |
Specifications
Packaging weight and dimensions included:| Weight | 0.25 kg |
|---|---|
| Dimensions | 17 × 13 × 4 cm |
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | SFP-25G-SR-S | Brand | Cisco |
| Product family | Cisco 25GBASE SFP28 modules | Product type | 25GBASE-SR SFP28 transceiver |
| Ordering description | 25GBASE-SR SFP28 Module for MMF | Form factor | SFP28 |
| Ethernet rate | 25 Gigabit Ethernet | Optical type | 25GBASE-SR 850nm MMF |
| Fiber type | Multimode fiber | Core size | 50.0 microns |
| Nominal wavelength | 850 nm | Transmit and receive wavelength range | 840 to 860 nm |
| 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 | Connector | Dual LC/PC |
| Patch-cord rule | PC or UPC connectors supported; APC connectors not supported | Host FEC requirement | RS-FEC required on host ports |
| Transmit power range | +2.4 to -8.4 dBm average | Receive power range | +2.4 to -10.3 dBm average |
| Maximum power consumption | 1.2W | Pull tab or bail latch color | Beige |
| FCoE support condition | Supported with appropriate host software support | Operating temperature range | 0 to 70 degrees C commercial range |
| Storage temperature range | -40 to 85 degrees C | Standards references | SFF-8402; SFF-8472; IEEE 802.3; IEEE P802.3by; IEEE P802.3cc |
| UCS 6536 support example | Cisco UCS 6536 Fabric Interconnect spec sheet lists SFP-25G-SR-S under SFP28 25-Gbps transceivers | Standard warranty | 5 years |
| Platform support boundary | Cisco Transceiver Module Group Compatibility Matrix should verify the exact host and software support |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
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What is Cisco SFP-25G-SR-S used for?
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How far can SFP-25G-SR-S reach?
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Is SFP-25G-SR-S compatible with 10G SR?
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What connector does SFP-25G-SR-S use?
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How is SFP-25G-SR-S different from SFP-10/25G-LR-S?
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Does SFP-25G-SR-S support FCoE?
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Can SFP-25G-SR-S be used in an SFP+ port?
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When is SFP-25G-SR-S the wrong SKU?
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