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LS-SM3125-40C 25g sfp28 1310nm 40km duplex lc upc dom smf optical transceiver module
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LINK-PP LS-SM3125-40C 25G SFP28 1310nm 40km Duplex LC/UPC DOM SMF Optical Transceiver Module

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Product summary

Product
LINK-PP LS-SM3125-40C 25G SFP28 1310nm 40km Duplex LC/UPC DOM SMF Optical Transceiver Module
SKU
181705
P/N
LS-SM3125-40C
Price
$ 152
Stock
885 in Stock
Sold
465
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
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22 Reviews
3 Questions
465 Sold
Shipping:
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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-SM3125-40C 25G SFP28 Specifications

LS-SM3125-40C 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.

LINK-PP Part Number LS-SM3125-40C 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 LINK-PP LS-SM3125-40C 25G SFP28

LINK-PP LS-SM3125-40C 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.

LINK-PP LS-SM3125-40C 25G SFP28 Optical Module

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.

LS-SM3125-40C: 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.

LS-SM3125-40C 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.

LS-SM3125-40C 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.

LS-SM3125-40C 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.

LS-SM3125-40C 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.


LINK-PP LS-SM3125-40C 25G SFP28 Certification

The LINK-PP LS-SM3125-40C is fully certified under ISO 9001, CE, RoHS, and FCC standards to ensure international compliance and environmental safety.

Optical Transceivers Testing

Each optical transceiver undergoes strict physical and optical hardware testing to ensure stable performance and complete compliance with industry standards.

LS-SM3125-40C Quality Certifications

These official credentials validate that our production lines maintain strict manufacturing controls and adhere to global telecommunication safety regulations.

LS-SM3125-40C 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.


Rigorous Testing Ensures Reliable SFP28 Performance

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

Optical Spectrum Test

Measure central wavelengths to guarantee precise fiber channel alignment.

Optical

Eye Pattern Test

Analyze transmitter signal integrity to ensure clean data waveforms.

Optical

Bit Error Rate Test

Verify long-term transmission accuracy under full-rate network traffic.

Optical

Temperature Test

Confirm operational stability across wide environmental thermal ranges.


Product Shipping for LINK-PP LS-SM3125-40C 25G SFP28

We provide secure logistics solutions for your optical transceiver orders. Efficient global shipping networks guarantee timely international delivery.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Shield fragile internal components from electrostatic discharge hazards during transit.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Secure transceiver modules inside durable enclosures to prevent physical damage.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Accelerate warehouse fulfillment times to ensure prompt shipment delivery schedules.

Global Logistics and International Delivery

Global Logistics and International Delivery

Ship parcels worldwide using trusted carriers for dependable network arrival.

LINK-PP LS-SM3125-40C 25G SFP28 Usage Demonstration

This module inserts seamlessly into hot-swappable SFP28 ports, minimizing network downtime during upgrades. LINK-PP LS-SM3125-40C 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. 

LS-SM3125-40C 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-SM3125-40C 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-SM3125-40C 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-SM3125-40C 25G SFP28 FAQ

Find quick answers regarding the internal laser architecture, 1310nm signal clarity, and power consumption of the LS-SM3125-40C 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 LS-SM3125-40C 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).

Model Comparison Table

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L***g
Taiwan, Province of China
Verified Purchase
5 .0
2026-04-16
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.
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.
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.
J***y
New Zealand
Verified Purchase
5 .0
2026-03-07
Great 25G optics for campus distribution! Installed a batch of these LS-SM3125-40C SFP28 transceivers to bridge two single-mode hub sites about 32km apart. APD receiver sensitivity is great, getting a rock-solid -16dBm. Perfect budget alternative!
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!
E***k
Maldives
Verified Purchase
5 .0
2026-02-26
Best 25GBASE-ER for the price. No packet loss after 72 hours of stress testing.
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.
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.
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!
G***m
Bangladesh
Verified Purchase
5 .0
2026-01-04
Amazing price for 40km span. These EML 1310nm lasers run cooler than expected! (^_^)
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.
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!
X***r
Italy
Verified Purchase
5 .0
2025-10-19
Our healthcare network needed more bandwidth between the main hospital campus and our off-site backup center (about 28km away). We swapped out our old 10G modules for these Duplex LC SMF transceivers. The installation was super easy: we plugged them in, and the links came up instantly at 25.78 Gbps. Thanks to the built-in DOM, we verified the optical signal levels right away without needing an external power meter. Our backup windows are now twice as fast, and the switches run at completely normal temperatures.
M***e
Brunei Darussalam
Verified Purchase
5 .0
2025-09-12
Great specs on these 25G single-mode optics. EML laser is highly accurate at 1310nm. Tested across a 34km long-haul dark fiber link and the link budget has plenty of headroom. Perfect for high-density fiber patch panels.
F***l
Philippines
Verified Purchase
5 .0
2025-08-26
No CRC errors at all. High-quality 25G SFP28 Duplex LC transceivers, highly recommended for data centers.
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.
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!
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.
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.
Z***h
Brazil
Verified Purchase
4 .0
2025-05-23
The 1310nm 40km EML laser output is excellent and DOM works fine. My only minor complaint is that a couple of the dust caps over the duplex LC ports had slipped off during transit. Had to use our fiber scope to verify the optical interfaces were clean before installing. Performance is flawless though.
D***r
Bulgaria
Verified Purchase
5 .0
2025-05-11
Solid SFP28 modules. 40km ER optics working like a charm on our campus fiber ring setup.
I***n
Morocco
Verified Purchase
5 .0
2025-04-15
LINK-PP never disappoints. Our go-to vendor for reliable 25GBASE-ER network deployments.
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