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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 |
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.
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.
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.
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.
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.
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.
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 complies with major international standards, including ISO 9001, CE, RoHS, and FCC certifications, to guarantee the highest safety and regulatory compliance.
Every transceiver undergoes a rigorous multi-stage testing process that checks signal integrity, optical power, and thermal stability before leaving the factory.
These strict industry credentials prove that the module meets global environment, safety, and manufacturing quality benchmarks.
The module is verified across multiple hardware platforms to ensure flawless plug-and-play operation and zero link dropouts with major switches.
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.
Measure wavelength accuracy to prevent signal crossover.
Analyze transmitter signal quality for clear data paths.
Verify zero-packet loss during high-speed data transmission.
Confirm stable performance across extreme industrial conditions.
We secure your modules with premium protective materials and partner with top global carriers for safe delivery.
Shield sensitive electronic components from electrostatic damage during transit.
Absorb physical impacts to keep internal hardware completely safe.
Speed up logistics workflows to minimize standard order wait times.
Ship packages seamlessly to customers worldwide through trusted networks.
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.
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
Professional guidance to help you select the optimal LS-SM3125-20I module for your network design and application needs.
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.
Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
Find practical guidance on deployment power metrics, extreme environmental operation, safe hot-plugging procedures, and accessing built-in diagnostic data.
Compatible | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Data Rate (Max) | 25.78Gbps | 25.78Gbps | 25.78Gbps | 25.78Gbps | 25.78Gbps | 10/25.78Gbps |
Wavelength | 1310nm | 1310nm | 1310nm | 1310nm | 1310nm | 850nm |
Connector | Duplex LC | Duplex LC | Duplex LC | Duplex LC | Duplex LC | Duplex LC |
Cable Distance (Max) | 20km | 2km | 30km | 40km | 10km | 100m |
Cable Type | SMF | SMF | SMF | SMF | SMF | MMF |
TX Power | -1 to +7dBm | 8 to +3dBm | -8 to +3dBm | -8.4~2.4dBm | ||
Receiver Sensitivity | -15 to +3dBm | -13.3dBm | -19dBm | -19dBm | -14 to +3dBm | <-10.3dBm |
Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40 to 85°C | 0°C to +70°C |
Form Factor | SFP28 | SFP28 | SFP28 | SFP28 | SFP28 | SFP28 |
Transmitter Type | DFB | DFB | EML | EML | DFB | VCSEL |
Receiver Type | PIN | PIN | APD | APD/TIA | PIN | PIN |
Receiver Overload | 2dBm | 2dBm | 2.4dBm | |||
Extinction Ratio | 3.5dB | >2dB | ||||
DDM/DOM | Supported | Supported | Supported | Supported | ||
Protocols | MSA Compliant, CPRI, eCPRI | MSA Compliant, CPRI, eCPRI | MSA Compliant, CPRI, eCPRI | SFF-8472, SFF-8432, SFF-8431 | SFF-8472, SFF-8402, SFF-8432, SFF-8431, CEI-28G-VSR | SFF-8472, SFF-8024, SFF-8431, SFF-8432 |
DOM | Supported | Supported | Supported | Supported |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Will this module sit correctly in a high-density 48-port SFP28 leaf switch without causing physical blocking or EMI issues? By R***d on 2026-01-26
A: Yes, the physical dimensions strictly adhere to the SFP28 MSA standard. The compact duplex LC housing ensures tight adjacent port isolation and prevents electromagnetic interference. By admin on 2026-01-27
Q: How does the 1310nm DFB laser maintain its frequency accuracy when exposed to heavy physical factory vibrations? By G***y on 2025-09-23
A: The internal optical assembly is structurally reinforced to dampen mechanical resonance, completely preventing laser wavelength shifting in heavy-industrial zones. By admin on 2025-09-24
Q: We have an existing single-mode fiber patch cord with a slightly degraded bend radius; will this 1310nm DFB laser cut through that extra attenuation? By I***s on 2025-07-06
A: While the module features a strong optical budget, heavy macro-bend losses can still degrade link stability over long distances. We highly recommend inspecting your fiber or replacing the patch cord if your DOM RX power readings drop below the -14dBm threshold. By admin on 2025-07-07
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