SM25G-SR is a hot-pluggable 25GBASE-SR SFP28 optical transceiver utilizing an 850nm VCSEL transmitter and PIN receiver to deliver a deterministic 25Gbps line rate across optical transport distances of up to 70m over OM3 or 100m over OM4 multi-mode fiber.
Chelsio Part Number
SM25G-SR
Vendor Name
LINK-PP
Form Factor
SFP28
Max Data Rate
25.7813Gbps
Wavelength
850nm
Max Cable Distance
100m@OM4/70m@OM3
Connector
Duplex LC
Media
MMF
Transmitter Type
VCSEL
Receiver Type
PIN
Power Consumption
≤3.3W
Extinction Ratio
>2dB
DDM/DOM
Supported
Operating Temperature Range
0°C to +70°C
TX Power
-8.4~2.4dBm
Minimum Receiver Power
＜-10.3dBm
Powerbudget
1.9dB
Receiver Overload
2.4dBm
DDM/DOM
Supported
FEC Function
Support RS-FEC, FC FEC
Protocols
SFF-8472, SFF-8024, SFF-8431, SFF-8432
Warranty
5 Years
Key Features of Chelsio SM25G-SR Compatible LINK-PP 25.7813G SFP28
Chelsio SM25G-SR Compatible LINK-PP module is a reliable 25GBASE-SR SFP28 optical transceiver module designed for short-reach data communication. It integrates advanced features including an 850nm wavelength, duplex LC interface, and digital optical monitoring to ensure stable multi-mode fiber connectivity. This module provides an efficient and cost-effective solution for modern enterprise network upgrades.
This module is fully compliant with the SFP28 MSA, RoHS, CPRI, and eCPRI standards to ensure excellent compatibility. It serves as an industry-standard pluggable transceiver for standard 25G Ethernet environments. The design guarantees seamless interoperability with various networking hardware brands.
SM25G-SR: 25 Gbps Connectivity for Top-of-Rack Interconnects
This transceiver delivers a reliable 25Gbps line rate to support the growing bandwidth demands of modern data centers. It is ideal for Top-of-Rack (ToR) switches connecting directly to servers or leaf switches. This ensures low latency and efficient data throughput across short-distance hardware links.
SM25G-SR Module with 850nm Wavelength
The module utilizes a dependable 850nm VCSEL transmitter to achieve stable optical signal transmission. This specific wavelength is optimized for high-efficiency and cost-saving operations over multi-mode fiber systems. It offers an ideal balance of power consumption and signal integrity.
SM25G-SR Module Supporting 100m Transmission
It supports data transmission distances of up to 100m when paired with OM4 multi-mode fiber cables. For networks utilizing OM3 multi-mode fiber, it covers a reliable distance of up to 70m. This makes it perfect for intra-rack and inter-rack data center cabling.
SM25G-SR Module with Duplex LC Interface
Equipped with an industry-standard duplex LC connector, the module ensures quick installation and tight physical connectivity. The precise optical alignment of the LC interface minimizes insertion loss during data transmission. It allows for high-density fiber patching in crowded network environments.
SM25G-SR Module with DOM for Real-Time Monitoring
The integrated Digital Optical Monitoring (DOM) function allows network administrators to track vital metrics in real time. It monitors key real-time telemetry such as operating temperature, voltage, laser bias current, and optical power. This proactive feature helps prevent sudden link downtime and simplifies troubleshooting.
Chelsio SM25G-SR Compatible LINK-PP complies with major international standards including ISO 9001, CE, RoHS, and FCC to ensure safety, environmental friendliness, and manufacturing excellence.
Each module undergoes rigorous hardware testing and optical parameter verification before shipment to ensure stable performance.
SM25G-SR Quality Certifications
These global credentials prove that the optical transceiver meets strict regulatory mandates for telecommunications hardware.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
SM25G-SR Certified for Reliable Host-Device Compatibility
The module is fully certified to work seamlessly across a wide range of industry-standard switches, routers, and servers without link errors.
Every LINK-PP SFP28 module undergoes strict hardware validation to ensure flawless signal integrity and total compatibility across demanding network environments. To discover how we guarantee these strict standards, explore the LINK-PP Test Support Center.
Optical Spectrum Test
Verify the central wavelength and spectral width for stable transmission.
Eye Pattern Test
Analyze optical signal quality to guarantee clear data waveforms.
Bit Error Rate Test
Measure data transmission accuracy to eliminate potential packet loss.
Temperature Test
Evaluate module reliability under varying thermal and environmental conditions.
Product Shipping for Chelsio SM25G-SR Compatible LINK-PP 25.7813G SFP28
We ensure secure packaging and efficient global delivery for every LINK-PP 25G SFP28 optical module. All shipments follow strict logistics standards.
Anti-Static Protective Packaging
Protect sensitive optical components from electrostatic discharge during handling.
Shock-Resistant Transport Protection
Secure the modules firmly to prevent damage during transit.
Fast Order Processing and Dispatch
Speed up order fulfillment to guarantee quick warehouse departure.
Global Logistics and International Delivery
Ship products worldwide using reliable international freight carriers.
Featuring hot-swappable operation, this SM25G-SR 25G SFP28 module offers effortless deployment without disrupting running systems. It serves as a vital component in modern data center interconnects (DCI), high-performance computing clusters, and enterprise server rooms to optimize short-range, 25Gbps multi-mode fiber links.
SM25G-SR Technical Support
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
Pre-Sales Technical Consultation
Professional guidance to help you select the optimal SM25G-SR module for your network design and application needs.
Compatibility Verification Support
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
Deployment & Installation Assistance
Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
A:
Yes, the secure Duplex LC bail latch mechanism is rigorously cycle-tested to ensure repeated clean connections without physical drift. By
admin on
2026-04-23
A:
The transceiver housing can withstand non-operational storage temperatures ranging from -40°C up to 85°C without warping the internal optical array. By
admin on
2025-11-22
A:
Not at all, as long as your multi-mode fiber faces are clean and your patch panels are within normal insertion loss specs, it will hold a flawless 25G link. By
admin on
2025-03-09
These modules are doing a fantastic job handling heavy virtualization traffic across our NVMe-over-Fabrics setup. The 850nm VCSEL laser holds up under high duty cycles. No CRC errors on the interfaces since deployment. Delivery to Ireland was fast, too.
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character.
473156
324907
J***d
Indonesia
Verified
Purchase
5 .0
2026-03-13
Managing enterprise networks means constantly balancing tight budgets against stringent uptime SLAs. I ordered a batch of these LINK-PP 25GBASE-SR SFP28 transceivers for a corporate headquarters network refresh, linking our distribution switches across three separate floors. The 850nm VCSEL transceivers have given us absolutely zero trouble. They interface perfectly with our existing multi-mode fiber patch leads and panels. The real-time DOM diagnostics are vital for our proactive maintenance strategies, allowing us to see exactly how the optical links are performing. The modules are fully compliant with IEEE 802.3 and SFF-8472 standards, ensuring total interoperability. LINK-PP has engineered an exceptional product here that I highly recommend for enterprise switch infrastructure.
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character.
473156
324902
N***n
United Kingdom
Verified
Purchase
4 .0
2026-01-28
Good cheap 25GBASE-SR optics for enterprise switch deployments. The DOM functions perfectly, reporting accurate laser metrics. Deducted one star because delivery to our UK site took an extra two days due to customs clearance delays. The modules themselves are perfect though.
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character.
473156
324915
G***w
Iran, Islamic Republic of
Verified
Purchase
5 .0
2026-01-11
While these are commercial-grade (0-70°C) modules meant for controlled indoor server environments, we utilized them in our indoor staging lab to simulate short-distance 25G base station backhaul loops and edge aggregation configurations. The transceivers performed flawlessly under intensive packet injection testing mimicking heavy mobile data streams. The 850nm wavelength over Duplex LC multi-mode fiber provides excellent signal integrity over short distances, and the optical eye diagram was remarkably clean. The DOM feature works effortlessly on our carrier-grade edge routers, providing critical metrics on Tx laser degradation over time. LINK-PP's build quality is evident in the casing mold—there is no physical stickiness or insertion friction in high-density patch panels, which can be an annoying issue with cheap 3rd party clones. For indoor network distribution layers and telecom staging, this transceiver is exceptional value.
Please write comments with more than three
character.
473156
324910
M***e
Romania
Verified
Purchase
4 .0
2025-11-24
Ordered a pack of 12 for our corporate network room upgrade. Modules link up cleanly at 25Gbps on our switches. However, the outer packaging was missing the English user instruction leaflet. Not a big deal for experienced network engineers, but would be nice for completeness. Hardware is solid.
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character.
473156
324914
G***y
Lithuania
Verified
Purchase
5 .0
2025-11-08
Excellent 25G SFP28 transceivers for server-to-switch interconnects in our regional data center. Checked the DDM info via CLI, and Tx/Rx optical powers are completely within nominal ranges. Will definitely look into LINK-PP for our next bulk fiber hardware procurement.
Please write comments with more than three
character.
473156
324906
F***d
Hong Kong
Verified
Purchase
5 .0
2025-10-03
Perfect fit for our data center leaf-spine architecture. 25G rate is stable, with low heat generation, and DOM readings are fully integrated into our SNMP monitoring dashboard. Very happy with this purchase.
Please write comments with more than three
character.
473156
324909
J***y
Cambodia
Verified
Purchase
5 .0
2025-06-21
Bought a batch of these LS-MM8525-S1C 25GBASE-SR modules for a Core-to-Aggregation link upgrade in our Chicago office. They hit full 25G speeds over 85m of OM4 fiber without any fuss. The built-in DOM allows real-time diagnostics on our Enterprise switches. Real lifesaver for the price!
Please write comments with more than three
character.
473156
324905
L***i
Bulgaria
Verified
Purchase
4 .0
2025-06-17
Modules perform exactly as advertised, hitting full 25G line rates over our 60m OM3 fiber runs. My only tiny complaint is that the pull-tab latches are a bit stiff on first insertion compared to our old 10G optics. They seat securely though, and DOM telemetry is perfect. Good budget choice.
Please write comments with more than three
character.
473156
324913
E***e
Singapore
Verified
Purchase
5 .0
2025-05-15
Using these for internal server room patching between our main firewalls and core switches. The 100m distance limit on OM4 is perfect for our layout. Total peace of mind with the native DOM monitoring support. Will buy again.
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character.
473156
324908
H***n
Israel
Verified
Purchase
5 .0
2025-04-24
We had a critical requirement to upgrade our internal corporate SAN to handle multi-stream 4K video editing and large database replication. Our setup involves an array of servers connected to a central storage array via OM4 fiber. These 25G SFP28 transceivers were a drop-in replacement for our aging 10G modules. The link came up at full 25Gbps instantly without any manual configuration or speed forcing required in the OS. We monitored the DDM/DOM attributes via the switch interface for a week; the operating temperature remained perfectly stable at 41°C. The duplex LC connector gives a solid, reassuring 'click' when fully seated, preventing accidental disconnects during routine cable management in the rack. Having reliable, cheap 25GBASE-SR optics available saves our IT budget that can be reallocated to raw storage capacity. A+ product.
United Kingdom · English · GBP
