SFP-25GER-31 is a 25G SFP28 duplex LC/UPC optical transceiver engineered for long-haul single-mode fiber (SMF) transmissions, delivering pinpoint 1310nm wavelength signaling up to 40km with an optimized maximum power consumption of just 1.8W and integrated DOM capabilities.
Mellanox Part Number
SFP-25GER-31
Vendor Name
LINK-PP
Form Factor
SFP28
Max Data Rate
25.78Gbps
Wavelength
1310nm
Max Cable Distance
40km
Connector
Duplex LC
Media
SMF
Transmitter Type
EML
Receiver Type
APD/TIA
Receiver Sensitivity
-19dBm
Operating Temperature range
0°C to +70°C
Protocols
MSA Compliant, CPRI, eCPRI
Warranty
5 Years
Key Features of Mellanox SFP-25GER-31 Compatible LINK-PP 25.78G SFP28
Mellanox SFP-25GER-31 Compatible LINK-PP module is a 25GBASE-ER SFP28 duplex LC/UPC optical transceiver designed for reliable long-haul single-mode fiber transmissions. It integrates a 1310nm wavelength configuration to achieve extended reach while embedding real-time diagnostic capabilities. The module delivers an efficient and standardized hardware architecture for demanding telecommunication and core enterprise environments.
This module features an advanced EML Laser transmitter paired with a highly sensitive APD/TIA receiver structure. This specialized internal hardware combination ensures optimal optical signal generation and robust reception over extended optical paths. It provides excellent link stability and signal integrity without increasing power consumption.
SFP-25GER-31: 25 Gbps Connectivity for Long-Range Core Links
Engineered to meet modern bandwidth demands, this transceiver delivers a dependable data rate of 25Gbps. It supports seamless aggregation and high-throughput transmission across core network environments. This speed allows operators to scale their network infrastructure efficiently to handle intensive data traffic.
SFP-25GER-31 Module with 1310nm Wavelength
The optical transceiver operates utilizing a precise 1310nm center wavelength designed specifically for single-mode fiber channels. This wavelength choice minimizes dispersion effects to maintain clean optical paths across long spans. It is fully standardized to ensure hassle-free deployment in multi-vendor networking environments.
SFP-25GER-31 Module Supporting 40km Transmission
This single-mode fiber (SMF) module is fully capable of driving optical signals up to a maximum distance of 40km. It acts as a cost-effective solution for metro networks and mid-mile backhaul infrastructures without needing extra amplification. The extended reach bridges regional distribution nodes reliably and efficiently.
SFP-25GER-31 Module with Duplex LC/UPC Interface
Equipped with an industry-standard duplex LC/UPC connector, the transceiver ensures secure and stable physical fiber connections. This design facilitates quick deployment, low insertion loss, and compatibility with standard optical patch cables. The precise UPC polish guarantees minimal back-reflection within the fiber infrastructure.
SFP-25GER-31 Module with DOM for Real-Time Monitoring
Featuring integrated Digital Optical Monitoring (DOM), this module provides real-time access to vital operating metrics. Network administrators can continuously track transceiver temperature, laser bias current, and optical power levels. This visibility enables proactive maintenance and ensures long-term operational uptime.
The Mellanox SFP-25GER-31 Compatible LINK-PP module is fully certified under ISO 9001, CE, RoHS, and FCC standards to ensure international compliance and environmental safety.
Each optical transceiver undergoes strict physical and optical hardware testing to ensure stable performance and complete compliance with industry standards.
SFP-25GER-31 Quality Certifications
These official credentials validate that our production lines maintain strict manufacturing controls and adhere to global telecommunication safety regulations.
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.
SFP-25GER-31 Certified for Reliable Host-Device Compatibility
Comprehensive hardware verification guarantees flawless interoperability and plug-and-play performance across a wide range of major brand switches and routers.
Every SFP28 optical transceiver undergoes strict performance evaluations to guarantee total networking stability, and you can discover comprehensive testing insights through the LINK-PP Test Support Center.
Optical Spectrum Test
Measure central wavelengths to guarantee precise fiber channel alignment.
Eye Pattern Test
Analyze transmitter signal integrity to ensure clean data waveforms.
Bit Error Rate Test
Verify long-term transmission accuracy under full-rate network traffic.
Temperature Test
Confirm operational stability across wide environmental thermal ranges.
Product Shipping for Mellanox SFP-25GER-31 Compatible LINK-PP 25.78G SFP28
We provide secure logistics solutions for your optical transceiver orders. Efficient global shipping networks guarantee timely international delivery.
Anti-Static Protective Packaging
Shield fragile internal components from electrostatic discharge hazards during transit.
Shock-Resistant Transport Protection
Secure transceiver modules inside durable enclosures to prevent physical damage.
Fast Order Processing and Dispatch
Accelerate warehouse fulfillment times to ensure prompt shipment delivery schedules.
Global Logistics and International Delivery
Ship parcels worldwide using trusted carriers for dependable network arrival.
This module inserts seamlessly into hot-swappable SFP28 ports, minimizing network downtime during upgrades. Mellanox SFP-25GER-31 Compatible LINK-PP serves as a vital component for long-haul telecommunications, bridging regional distribution nodes and supporting high-capacity data transport across modern enterprise core networks up to 40km away.
SFP-25GER-31 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 SFP-25GER-31 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.
Find quick answers regarding the internal laser architecture, 1310nm signal clarity, and power consumption of the SFP-25GER-31 long-range 25G SFP28 transceiver.
It is built for long distances. It lets you send massive 25Gbps data up to 40km away over a single pair of fiber cables.
The 1310nm light wavelength is perfect for single-mode fiber because it keeps the signal clear and strong over long distances.
The SFP-25GER-31 25G module integrates an Electro-absorption Modulated Laser (EML) transmitter and a highly sensitive Avalanche Photodiode (APD) receiver with a Transimpedance Amplifier (TIA) to ensure stable long-range signaling.
Due to the extended-reach EML and APD components, it typically consumes approximately 1.8W under standard operating conditions (3.3V supply).
A:
The module safely supports links up to 40km (25GBASE-ER standard) over standard G.652 single-mode fiber, assuming normal splice and connector loss. By
admin on
2025-10-31
Enterprise-grade module at a fraction of OEM cost. Our IT procurement team was hesitant about third-party 40km ER optics, but these Link-PP SFP28 25G transceivers cleared all compliance checks. Low 1.8W power consumption keeps the rack temperature down.
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493980
333000
S***s
France
Verified
Purchase
5 .0
2026-04-01
Impressive 25G link budget. Deployed on a 30km single-mode fiber span with multiple splice points. Was worried about attenuation but the high-performance EML transmitter punched right through. Links have been up for 35 days straight.
Please write comments with more than three
character.
493980
333005
U***y
Australia
Verified
Purchase
5 .0
2026-03-16
We manage the IT infrastructure for a large automated warehouse facility where downtime is not allowed. We deployed these 25G SFP28 1310nm 40km modules to link our main server room to edge switches across the property. Even though these are commercial-grade (0-70°C), they are housed in outdoor enclosures and handle minor temperature shifts with no issues. The 25Gbps speed easily handles hundreds of HD security cameras and heavy data traffic at the same time. Very durable and great value.
Please write comments with more than three
character.
493980
333007
O***y
United States
Verified
Purchase
5 .0
2026-03-03
Clean engineering on the Duplex LC/UPC connector. Clicked right into place. Ran an extended optical spectrum test and there was absolutely zero packet loss or CRC anomalies. Excellent quality control from LINK-PP!
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character.
493980
333002
W***h
Ireland
Verified
Purchase
5 .0
2026-02-09
We recently upgraded our data center inter-rack architecture to support 25G speeds. We needed reliable 25G SFP28 duplex LC optics to connect to our disaster recovery site 32km away. We ordered 50 pieces of this LINK-PP module. Every single unit worked out of the box with zero defects. They comply fully with standard SFF-8472 protocols, and our network management system tracks their DOM data perfectly. If you manage a large network and need long-range 25G throughput without the high OEM price, this is a top-tier choice.
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character.
493980
333009
P***y
Japan
Verified
Purchase
5 .0
2026-01-23
Excellent thermal performance. Some 25G 40km SFP28 modules run super hot and degrade quickly, but the LS-SM3125-40C stays well within normal operating temperature limits even in high-density 48-port top-of-rack switches.
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character.
493980
333003
Y***t
Spain
Verified
Purchase
4 .0
2026-01-16
These 25Gbps single-mode fiber modules perform exactly as advertised. Got full 25G throughput over our 35km link. The plastic pull-tab on the duplex LC connector is a little stiff on first use, making it slightly tricky to unlatch from our older, high-density patch panels. Works fine after a few insertions though!
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character.
493980
333010
T***e
Canada
Verified
Purchase
5 .0
2025-12-22
Awesome supplier for networking gear. We buy networking components in bulk for the corporate campus network. These 25G SFP28 transceivers are our new standard for long-range intra-building links. Excellent build quality.
Please write comments with more than three
character.
493980
333006
K***s
Lithuania
Verified
Purchase
5 .0
2025-11-24
Rock solid DOM monitoring. Deployed these 25GBASE-ER modules for our regional ISP nodes. The built-in Digital Optical Monitoring (DOM) makes it easy to track real-time laser bias and temperatures via SNMP. Will buy more for next month's fiber rollout!
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character.
493980
332997
N***y
United States
Verified
Purchase
5 .0
2025-08-15
Best cost-per-gigabit for 40km links. Buying OEM 25GBASE-ER modules would have blown our entire Q3 budget. These LINK-PP 25G SFP28 40km transceivers deliver identical performance for way less. Shipping to the US was fast, too.
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character.
493980
333001
Z***h
Russian Federation
Verified
Purchase
4 .0
2025-08-11
These 25G SFP28 modules are fully MSA compliant, but on our older switches, the link light takes about 10 seconds to turn on after hot-plugging. Once the handshake finishes, the throughput is rock-solid with zero errors. Just be patient when you first plug them in!
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character.
493980
333011
R***l
United Kingdom
Verified
Purchase
5 .0
2025-07-09
Perfect for Metro Ethernet rings. Deployed 30 of these SFP28 optical transceivers across our metro ring. The 25Gbps bandwidth handles our peak evening transit traffic with ease. CPRI protocol support is a nice bonus for future upgrades.
Please write comments with more than three
character.
493980
333004
V***y
Republic of Korea
Verified
Purchase
5 .0
2025-06-13
The Link-PP LS-SM3125-40C is a well-made 25G SFP28 module built for serious long-range single-mode fiber infrastructure. The 1310nm wavelength is ideal because it avoids the signal distortion issues you sometimes get on 1550nm channels at this distance. I tested these in a warm server room environment, and the internal laser kept the power output completely flat and stable. The duplex LC port is perfectly molded and doesn't stress the fiber tips. This is exactly the optical module we need.
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