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LINK-PP LS-SM3125-20I 25G SFP28 1310nm 20km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
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LINK-PP LS-SM3125-20I 25G SFP28 1310nm 20km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

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Product summary

Product
LINK-PP LS-SM3125-20I 25G SFP28 1310nm 20km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU
183259
P/N
LS-SM3125-20I
Price
$ 40.76
Stock
548 in Stock
Sold
850
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
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44 Reviews
3 Questions
850 Sold
$ 40.76 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
1
$ 40.76
100
$ 38.722
1000
$ 37.5
3000
$ 36.277
6000
$ 35.054
Manufacture: LINK-PP P/N: LS-SM3125-20I SKU: 183259
Shipping:
Free Shipping
to United States via FedEx
Estimated delivery time : 3-10 days.
5-Year Warranty 30-Day Returns 30-Day Exchange
Warranty
  • Providing industry-leading 5-year warranty.
  • Read the table for details of all products' warranty.
Returns & Exchange
  • Refunds will be received about 5 business days after the receipt of returned items.
  • Items in stock for replacement can be shipped within 1 business day.
  • Read the full return policy for details.
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LINK-PP LS-SM3125-20I 25G SFP28 Specifications

LS-SM3125-20I is an industrial-grade 25G SFP28 optical transceiver module featuring a 1310nm DFB laser transmitter, a duplex LC/UPC connector, and integrated DOM support to achieve reliable data transmission over single-mode fiber up to 20km while maintaining a tight maximum power consumption of 1.2W.

LINK-PP Part Number LS-SM3125-20I Vendor Name LINK-PP
Form Factor SFP28 Max Data Rate 25.78Gbps
Wavelength 1310nm Max Cable Distance 20km
Connector Duplex LC Media SMF
Transmitter Type DFB Receiver Type

PIN

Receiver Sensitivity <-14dBm Receiver Overload

2dBm

TX Power -1 to +7dBm RX Power -15 to +3dBm
DOM Supported Protocols MSA Compliant, CPRI, eCPRI
Operating Temperature Range -40°C to +85°C Extinction Ratio 3.5dB

Key Features of LINK-PP LS-SM3125-20I 25G SFP28

LINK-PP LS-SM3125-20I is an industrial-grade 25GBASE-LR SFP28 optical transceiver module designed for robust long-distance data transmission over single-mode fiber. It combines a 1310nm DFB laser, a duplex LC/UPC interface, and real-time DOM monitoring within a low-power 1.2W design. This module provides a highly reliable and standardized hardware solution for challenging network environments.

LINK-PP LS-SM3125-20I 25G SFP28 Optical Module

This optical transceiver strictly complies with industry standards including IEEE 802.3cc, SFF-8472 Rev 12.2b, SFF-8432a, and SFF-8431 Rev. 3.0c. These rigorous specifications ensure broad compatibility and seamless interoperability with major networking hardware vendors. The hot-pluggable SFP28 form factor allows for effortless installation and system maintenance without interrupting live traffic.

LS-SM3125-20I: 25 Gbps Connectivity for Long-Haul Industrial Links

Built specifically to withstand harsh environment networks, this module guarantees stable 25Gbps data throughput across wide temperature variations. It serves as a rugged interconnect solution for industrial edge deployments and long-haul factory automation backbones. The underlying hardware is optimized to maintain data integrity where standard commercial optics fail.

LS-SM3125-20I Module with 1310nm Wavelength

The transceiver utilizes a high-efficiency 1310nm DFB laser transmitter to emit optical signals through single-mode fiber. This specific wavelength provides an ideal balance of low attenuation and minimal dispersion for medium-to-long-range communications. It ensures clean signal transmission and reliable link quality over the entire fiber path.

LS-SM3125-20I Module Supporting 20km Transmission

Engineered for extended reach, this module safely spans network distances up to 20km over standard single-mode fiber (SMF). It easily bridges the physical gap between remote industrial sites and centralized data distribution centers. The optical power budget is carefully regulated to prevent signal degradation over these long-distance runs.

LS-SM3125-20I Module with Duplex LC/UPC Interface

Equipped with an industry-standard duplex LC/UPC connector, the module ensures a tight, secure physical fiber connection. The ultra-physical contact (UPC) polish minimizes back-reflection to optimize optical performance and reduce signal loss at the patch point. Its compact connector design maximizes port density on switches and patch panels.

LS-SM3125-20I Module with DOM for Real-Time Monitoring

Integrated Digital Optical Monitoring (DOM) provides network administrators with real-time diagnostics of critical module parameters. It constantly tracks active metrics such as optical output power, receiver input power, laser bias current, temperature, and supply voltage. This telemetry allows for proactive troubleshooting and prevents unexpected network downtime in critical industrial operations.


LINK-PP LS-SM3125-20I 25G SFP28 Certification

LINK-PP LS-SM3125-20I complies with major international standards, including ISO 9001, CE, RoHS, and FCC certifications, to guarantee the highest safety and regulatory compliance.

Optical Transceivers Testing

Every transceiver undergoes a rigorous multi-stage testing process that checks signal integrity, optical power, and thermal stability before leaving the factory.

LS-SM3125-20I Quality Certifications

These strict industry credentials prove that the module meets global environment, safety, and manufacturing quality benchmarks.

LS-SM3125-20I Certified for Reliable Host-Device Compatibility

The module is verified across multiple hardware platforms to ensure flawless plug-and-play operation and zero link dropouts with major switches.


Rigorous Testing Ensures Reliable SFP28 Performance

Every module undergoes strict physical evaluation to ensure maximum uptime, and you can explore our complete quality assurance methodology at the LINK-PP Test Support Center.

Optical

Optical Spectrum Test

Measure wavelength accuracy to prevent signal crossover.

Optical

Eye Pattern Test

Analyze transmitter signal quality for clear data paths.

Optical

Bit Error Rate Test

Verify zero-packet loss during high-speed data transmission.

Optical

Temperature Test

Confirm stable performance across extreme industrial conditions.


Product Shipping for LINK-PP LS-SM3125-20I 25G SFP28

We secure your modules with premium protective materials and partner with top global carriers for safe delivery.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Shield sensitive electronic components from electrostatic damage during transit.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Absorb physical impacts to keep internal hardware completely safe.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Speed up logistics workflows to minimize standard order wait times.

Global Logistics and International Delivery

Global Logistics and International Delivery

Ship packages seamlessly to customers worldwide through trusted networks.

LINK-PP LS-SM3125-20I 25G SFP28 Usage Demonstration

Slide the LINK-PP LS-SM3125-20I 25GBASE-LR optical module into any standard SFP28 port and connect your duplex LC/UPC single-mode fiber patch cord for instant setup. It provides reliable, long-range 25Gbps connectivity for demanding applications like metro Ethernet access, remote industrial edge networks, and factory automation.

LS-SM3125-20I 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

Pre-Sales Technical Consultation

Professional guidance to help you select the optimal LS-SM3125-20I module for your network design and application needs.

Compatibility Verification Support

Compatibility Verification Support

Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.

Deployment & Installation Assistance

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

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.

LINK-PP LS-SM3125-20I 25G SFP28 After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15 days

15-day no-reason return and refund

Free maintenance or replacement

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free maintenance

 Free repair services for manufacturing defects throughout the warranty period

Limitations

Warranty exclusions and conditions apply

LINK-PP LS-SM3125-20I 25G SFP28 FAQ

Find practical guidance on deployment power metrics, extreme environmental operation, safe hot-plugging procedures, and accessing built-in diagnostic data.

It consumes less than 1.2W, making it highly energy-efficient for high-density 25G network deployments.
Yes, the industrial rating ensures stable operation from -40°C to +85°C, though ensure adequate airflow and avoid condensation on the optical interfaces.
It supports hot‑swapping, but always follow ESD precautions – ground yourself and handle the module by its edges to avoid static damage.
Use the switch’s DOM monitoring commands or SNMP queries; the module provides TX/RX power, bias current, voltage, and temperature.

Model Comparison Table

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H***e
Finland
Verified Purchase
5 .0
2026-03-22
Love how the SFF-8472 digital diagnostics report accurate real-time metrics. RX power sits beautifully right in the sweet spot over our 12km single-mode fiber patch. No attenuation pads needed.
O***d
Poland
Verified Purchase
5 .0
2026-03-14
We operate a massive steel mill facility where high-voltage machinery generates immense electromagnetic interference (EMI) and heavy ambient floor vibrations. Standard commercial optics kept getting dislodged or throwing continuous CRC errors on our 25G backbone. The mechanical locking latch of this duplex LC module provides a heavy, industrial-grade mechanical seat inside the SFP28 cage that completely dampens vibration. Combined with its rugged internal shielding, the optical link has remained 100% stable since installation. Excellent component for heavy-industry IoT applications.
A***e
Mexico
Verified Purchase
5 .0
2026-02-26
Best 25GBASE-LR alternative module. Incredible value for an industrial-grade DOM SMF transceiver.
L***k
United States
Verified Purchase
5 .0
2026-01-23
Deployed these in an unheated industrial enclosure up in Minnesota during a brutal winter freeze. The module started up immediately and maintained perfect optical wavelength stability.
E***s
Netherlands
Verified Purchase
5 .0
2026-01-14
Needed a rugged 25G SFP28 1310nm 20km module for our fiber links running between campus buildings. Standard optics kept flaking out during summer heatwaves, but these industrial-grade units (-40°C to +85°C) haven't missed a beat.
S***g
Canada
Verified Purchase
4 .0
2026-01-08
Awesome price, but the pull-tab is a little stiff at first. These are easily the best value industrial 25GBASE-LR modules on the market right now. The only minor issue is that the pull-tab was a bit stiff to unlock the first time we tried to hot-swap them. It gets easier after a few tries.
Y***t
India
Verified Purchase
5 .0
2025-12-18
Flawless performance. The 1310nm 20km reach is perfect for our remote outdoor node links.
R***s
Hungary
Verified Purchase
4 .0
2025-12-12
Minor shipping delay, but the hardware is rock solid. The shipment arrived two days later than estimated, which put our maintenance window under a lot of stress. Thankfully, the plug-and-play compatibility on our switches was seamless, so we managed to catch up on time. The 20km single-mode fiber reach is working perfectly.
N***w
Italy
Verified Purchase
5 .0
2025-11-02
Our municipal Metro-Ethernet ring upgrade suffered from sporadic link dropouts at 25G speeds due to chromatic dispersion on older fiber paths around the 20km limit. Switching our core optics to the LINK-PP 1310nm wavelength completely neutralized the dispersion curve anomalies we were experiencing with cheaper generic brands. The spectral width of their DFB laser is tightly controlled, delivering a razor-sharp signal over long SMF distances without needing expensive dispersion compensation modules (DCM).
D***y
Russian Federation
Verified Purchase
5 .0
2025-10-06
Rock solid under heat. Running inside an uncooled outdoor cabinet and staying completely cool.
G***e
Norway
Verified Purchase
5 .0
2025-09-29
Using these for a 25G high-frequency trading link setup. The PIN receiver sensitivity is awesome (<-14dBm), and the low-latency profile matches exactly what our stack requires. Highly recommended for enterprise core networks.
B***z
Republic of Korea
Verified Purchase
5 .0
2025-08-31
Duplex LC/UPC fits tightly. No loose connections, optical loss is practically non-existent.
K***s
Austria
Verified Purchase
5 .0
2025-08-17
Hooked up our main distribution frame to an aggregation switch across our warehouse complex. Speed is locked at a stable 25Gbps. LINK-PP has earned our trust for all future fiber rollouts.
Q***e
Bulgaria
Verified Purchase
5 .0
2025-07-28
Deploying 5G mobile fronthaul means dealing with dirty real-world fiber plants. Our regional deployment spanned a 16km single-mode fiber path that has at least four legacy fusion splices and two outdoor patch panels, introducing considerable insertion loss. Operating under strict eCPRI timing constraints, we were worried about signal degradation. However, the module's high-efficiency DFB laser punched straight through the attenuation. The optical power budget handled the losses comfortably, maintaining a rock-solid timing synchronization loop with zero frame slippage. For telecom field engineers, this hardware is bulletproof.
J***n
Belgium
Verified Purchase
5 .0
2025-06-14
Tested over a spooled 18km single-mode fiber line in our lab before field deployment. Zero frame loss during a 48-hour continuous stress test. Truly enterprise-grade engineering.
C***x
Turkey
Verified Purchase
5 .0
2025-05-25
Excellent CPRI/eCPRI support. Perfect match for our 5G cell site backhaul test.
F***y
Sweden
Verified Purchase
5 .0
2025-04-14
Our field telecom crew deployed these for an eCPRI wireless backhaul link. The 1310nm DFB laser punches through the distance easily. Stable TX power (-1 to +7dBm) over a 15km run. Excellent hardware. ✨
M***s
Spain
Verified Purchase
5 .0
2025-04-05
Used these for upgrading frontline cell site routers. Fully compatible with our devices. Low power draw keeps the remote node thermal profile exactly where we need it.
Z***r
Brazil
Verified Purchase
5 .0
2025-03-15
Quick upgrade to 25G. Our server room migration went incredibly smoothly with these modules.
P***n
Romania
Verified Purchase
5 .0
2025-02-19
Port density on modern 25G leaf switches creates a nightmare for electromagnetic interference (EMI) and adjacent channel crosstalk. What sets this module apart is the structural isolation of its duplex LC/UPC interface. The physical alignment mechanism provides an incredibly tight optical coupling, which dramatically reduces back-reflection and near-end crosstalk (NEXT) when all 48 ports are packed continuously. The 1.2W low-power design also means we don't have localized thermal pockets cooking adjacent optical paths. Our Bit Error Rate (BER) testing returned a pristine 10⁻¹² score. Truly premium optical engineering.
I***l
Denmark
Verified Purchase
5 .0
2025-02-06
The mechanical latching mechanism feels premium. It gives a satisfying click when seating into the SFP28 cage, and the UPC finish keeps back-reflection incredibly low. Top marks.
B***e
United States
Verified Purchase
4 .0
2025-01-21
The transit took an extra day due to bad weather, so we missed our Saturday morning server room downtime window. We had to reschedule for Sunday night. The modules themselves are perfect — plugged them in and the link state went green immediately.
A***n
Belgium
Verified Purchase
5 .0
2024-08-27
Work as described.
J***w
Taiwan, Province of China
Verified Purchase
5 .0
2024-08-21
Good product at a very reasonable price. Keep going better
R***m
Argentina
Verified Purchase
5 .0
2024-07-28
I recommend this company to everyone, it's much better than expected, no matter its modules or services. Rachel, my consultant, is very helpful, and update me every steps in this purchasing process. When I received my Optical Transceiver Module I had ordered, it was well packaged and worked fine with my switch. If possible, I will buy all my fiber products in l-p.com.
B***g
United States
Verified Purchase
5 .0
2024-05-13
Order came complete and in a timely manner.
D***r
Morocco
Verified Purchase
5 .0
2024-05-06
l-p.com provided excellent customer service for me. I would recommend the company.
C***n
Japan
Verified Purchase
5 .0
2024-04-26
Best supplier!
A***e
United Kingdom
Verified Purchase
5 .0
2024-03-02
These modules are awesome. They work prefectly. They are recognized right away with the speeds advertised. LINK-PP support has been great with all of our questions and helping us find the right modules for our needs. We will be using LINK-PP again the future for our Fiber needs. Thank you!
M***r
United Kingdom
Verified Purchase
5 .0
2024-01-09
Prompt and efficient service.
R***a
Bangladesh
Verified Purchase
5 .0
2023-12-19
I just placed my second order with LINK-PP and have been extremely impressed by the service. Orders are filled quickly and the prices are far better than ordering directly from local stores.
K***o
Russian Federation
Verified Purchase
5 .0
2023-12-06
It would be nice if you updated your inventory. Some items are not available any more. I had to chat to find out what was which went well.
D***g
Brunei Darussalam
Verified Purchase
5 .0
2023-10-29
I've always gotten a fair price. Thank you!
J***n
Philippines
Verified Purchase
5 .0
2023-10-23
Work well without any issues, and the quality is beyond what I expected!
N***p
United States
Verified Purchase
5 .0
2023-09-04
I am a very novice user. I just explained what hardware I have and that was it ! The team at l-p.com made sure I had the right part and everything arrrived via international shipping within the week. Very impressed and very happy. Everything just works. Thank You !
J***n
United States
Verified Purchase
5 .0
2023-07-26
Good pricing and Fast shipping. Very good website and easy to find products I was looking for.
M***a
Russian Federation
Verified Purchase
5 .0
2023-07-08
Good selection of goods. Outstanding service and support!
G***g
Lithuania
Verified Purchase
5 .0
2023-05-23
Needs another way to send the goods because Fedex is Fast but very expensive.
B***i
United States
Verified Purchase
5 .0
2023-03-26
Great website for screening choices quickly. It's always easy to place orders with l-p.com.
J***n
Norway
Verified Purchase
5 .0
2023-03-19
I worried about the quality at the begining. I used it soon after it came, just out of my expectation, quality is great!
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