SFP-10/25G-CSR-S – 10/25GBASE-CSR SFP28 – 850nm 400m MMF Transceiver
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SFP-10/25G-CSR-S Description
SFP-10/25G-CSR-S is a Cisco dual-rate SFP28 optical transceiver supporting both 10Gbps and 25Gbps Ethernet. Designed for extended-reach, high-performance data center connections, it enables seamless upgrades and compatibility in mixed 10G/25G environments. This module operates over OM3/OM4 multimode fiber, delivering up to 300 meters (OM3) or 400 meters (OM4/OM5) with standard LC connectors. SFP-10/25G-CSR-S is hot-swappable, energy efficient (1.2W), and requires RS-FEC for 25G operation. Commonly known as Cisco 25G CSR SFP28 or 10/25G SFP28 CSR, it is ideal for modern leaf-spine architectures, inter-rack connections, and aggregation links in cloud, enterprise, and service provider networks.
Product Highlights
Key Features
- Application:
- Designed for extended-reach 10G/25G Ethernet links within and between data center racks, large server rooms, or campus buildings.
- Excellent for leaf-spine, inter-rack, and cross-floor aggregation, especially where fiber runs exceed typical SR or SL distances.
- Functionality:
- Dual-rate (supports both 10G and 25G speeds) for flexible upgrade and mixed-network deployments.
- Longest multimode reach in SFP28 series (up to 300m on OM3, 400m on OM4/OM5).
- RS-FEC required on host for 25G operation; optional for 10G.
- Ideal for future-proofing large data centers, minimizing switch layers, and supporting scalable cloud architectures.
- Industries:
- Telecom, cloud providers, large enterprises, universities, research institutions.
Application Scenarios
Provides high-speed 10G or 25G connectivity between switches or server racks across long distances (up to 400m), minimizing network hops and reducing latency.
Perfect for organizations transitioning from 10G to 25G networks, allowing flexible use in dual-rate deployments without hardware changes.
Used in large campuses, carrier data centers, and cloud platforms for aggregation, spine-leaf connections, and distribution layers requiring long multimode fiber runs.
Model comparison
|
Parameter |
SFP-10/25G-CSR-S | ||
|---|---|---|---|
|
Form Factor |
SFP28 |
SFP28 |
SFP28 |
|
Data Rate |
10/25 Gbps |
25 Gbps |
25 Gbps |
|
Wavelength |
850 nm |
850 nm |
850 nm |
|
Fiber Type |
MMF |
MMF |
MMF |
|
Max. Distance |
300m (OM3)/400m (OM4) |
70m (OM3)/100m (OM4) |
20m (OM3)/30m (OM4) |
|
Power Consumption |
1.2 W |
1.2 W |
1.2 W |
|
Operating Temp. |
0~70°C |
0~70°C |
0~70°C |
|
FEC Requirement |
RS-FEC (25G) |
RS-FEC required |
RS-FEC required |
|
Hot-swappable |
Yes |
Yes |
Yes |
|
Connector |
LC Duplex |
LC Duplex |
LC Duplex |
|
Rate Support |
10G/25G |
25G only |
25G only |
Platform Compatibility
SFP-25G-SR-S is compatible with a wide range of Cisco devices equipped with SFP28 ports, including but not limited to:
Safety & Compliance
This product meets the following standards and compliance requirements:
- IEEE Standards:
- IEEE 802.3by (25GBASE Ethernet)
- IEEE 802.3cc (25GBASE over SMF)
- SFP28 MSA:
- SFF-8402: SFP+ 28 Gb/s 1x Pluggable Transceiver Solution
- SFF-8472: Diagnostic Monitoring Interface for Optical Transceivers
- Safety:
- Laser Class 1 (IEC 60825-1)
- Laser Class 1 (21CFR-1040 LN#50 7/2001)
- Environmental:
- RoHS 6 compliant
- Cable jacket of SFP copper modules is UL E116441 Compliant
- ELV (End-of-Life Vehicle) compliant for SFP copper cables
- Product Material Content:
- Conforms to WEEE regulations (electronic waste and recycling)
- Cisco Takeback and Reuse Program supported
Specifications
| Parameter | Value |
|---|---|
| Product Model | SFP-10/25G-CSR-S |
| Form Factor | SFP28 |
| Data Rate | 10/25 Gbps (dual-rate) |
| Wavelength | 850 nm |
| Interface | LC Duplex (PC/UPC) |
| Cable Type | MMF (OM3/OM4/OM5) |
| Max. Distance | 300m (OM3) / 400m (OM4/OM5) |
| Transmit Power (max/min) | +2.4 dBm / -7.3 dBm (10G), +2.4 dBm / -6 dBm (25G) |
| Receive Power (max/min) | +2.4 dBm / -9.9 dBm (10G), +2.4 dBm / -8.7 dBm (25G) |
| Power Consumption | 1.2 W |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Storage Temperature | -40 to 85°C (-40 to 185°F) |
| FEC Requirement | RS-FEC required for 25G |
| Connector | Dual LC/PC |
| Compliance | IEEE 802.3by, SFF-8402, SFF-8472, RoHS 6 |
Get More Information
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Quality Certifications
Customer Reviews
Questions & Answers
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What problem does SFP-10/25G-CSR-S solve?
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How far can SFP-10/25G-CSR-S run on OM3 and OM4?
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Why do Cisco Community threads warn about 10G-only ports for SFP-10/25G-CSR-S?
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Does SFP-10/25G-CSR-S need FEC at 25G?
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Can SFP-10/25G-CSR-S link to older SFP-10G-SR modules?
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Which fiber type belongs with SFP-10/25G-CSR-S?
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What upgrade path fits SFP-10/25G-CSR-S?
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Which purchase error affects SFP-10/25G-CSR-S?
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