The LINK-PP LS-SM551G-A6I is a high-performance, cost-effective SFP optical transceiver designed for 1.25Gbps Gigabit Ethernet and Fiber Channel applications. Operating over a 1550nm wavelength, this industrial-grade module supports long-distance data transmission up to 160km via single-mode fiber, utilizing a duplex LC connector interface for reliable connectivity in extreme environments.
LINK-PP Part Number
LS-SM551G-A6I
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm
Max Cable Distance
160km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
APD
TX Power
0 to +5dBm
RX Power
-30 to -1dBm
Receiver Sensitivity
-32dBm
DOM Support
Yes
Operating Temperature Range
-40 to 85°C
Protocols
SFF-8472 MSA Compliant, IEEE 802.3ah-2004
Key Features of LINK-PP LS-SM551G-A6I 1.25G SFP
This industrial transceiver features an extended operating temperature range from -40°C to 85°C, a high-sensitivity APD receiver, and a 1550nm DFB laser. It incorporates built-in Digital Optical Monitoring (DOM) for real-time diagnostics, a standard duplex LC interface, and compliance with SFP MSA and SFF-8472 standards.
LINK-PP LS-SM551G-A6I 1.25G SFP Optical Module
The LINK-PP LS-SM551G-A6I 1.25G SFP optical module provides reliable, high-speed data transmission over ultra-long distances. Engineered for rugged deployments, it serves as an authoritative solution for extending network reach in challenging industrial and telecom setups.
LS-SM551G-A6I: 1G Connectivity for SCADA System Telemetry
The LS-SM551G-A6I delivers dependable 1G connectivity tailored for SCADA system telemetry. Its exceptional long-range performance ensures continuous, real-time data transmission between remote substations and central control units over vast industrial landscapes.
LS-SM551G-A6I Module with 1550nm Wavelength
Equipped with a 1550nm DFB laser transmitter, the LS-SM551G-A6I module operates at the optimal wavelength for long-haul single-mode fiber communication, significantly minimizing signal attenuation and dispersion during high-speed data transmission.
Designed for ultra-long-distance networking, the LS-SM551G-A6I module supports seamless data transmission up to 160km. This makes it an ideal choice for backhaul networks, regional telecom infrastructure, and wide-area industrial links.
LS-SM551G-A6I Module with Duplex LC Interface
Featuring a standard duplex LC interface, the LS-SM551G-A6I module ensures secure, stable, and low-loss optical fiber connections. Its compact design facilitates high-density port configurations in professional network switches and routers.
LS-SM551G-A6I Module with DOM for Real-Time Monitoring
The LS-SM551G-A6I module includes integrated Digital Optical Monitoring (DOM) capabilities. This enables network administrators to monitor critical real-time parameters such as optical output power, receiver sensitivity, temperature, and supply voltage.
LINK-PP LS-SM551G-A6I 1.25G SFP Certification
The LINK-PP LS-SM551G-A6I 1.25G SFP transceiver is manufactured under strict quality guidelines, carrying authoritative industry certifications to guarantee international safety, environmental responsibility, and elite technical performance.
Our comprehensive quality testing program subjected each LS-SM551G-A6I module to rigorous optical and environmental evaluations, verifying that every single unit meets strict industrial reliability benchmarks before shipment.
LS-SM551G-A6I Quality Certifications
All LINK-PP modules comply with ISO 9001 manufacturing standards and meet CE, RoHS, and FCC certification requirements through strict quality management processes.
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.
LS-SM551G-A6I Certified for Reliable Host-Device Compatibility
This module is comprehensively certified for broad host-device compatibility, ensuring plug-and-play functionality and seamless interoperability with major brands of industrial switches, routers, and media converters.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-SM551G-A6I undergoes a stringent multi-stage testing process to ensure flawless performance, maximum reliability, and full compliance with critical industrial networking specifications.
Optical Spectrum Test
The optical spectrum test verifies central wavelength accuracy and side-mode suppression ratios for stable long-distance transmission.
Eye Pattern Test
The eye pattern test evaluates signal integrity, transmitter performance, and the absence of waveform distortion.
Bit Error Rate Test
The bit error rate test confirms error-free data transmission under maximum network load conditions.
Temperature Test
The temperature test validates flawless component functionality across the full -40°C to 85°C industrial range.
Product Shipping for LINK-PP LS-SM551G-A6I 1.25G SFP
We implement secure logistics protocols and protective packaging standards to ensure your LS-SM551G-A6I modules arrive safely, promptly, and ready for immediate deployment.
Anti-Static Protective Packaging
Each module is sealed inside a premium anti-static ESD bag to prevent electrical damage.
Shock-Resistant Transport Protection
Custom-fitted, shock-absorbing trays shield the optical transceivers from physical vibration during transit.
Fast Order Processing and Dispatch
Our efficient warehousing system ensures rapid processing and prompt dispatch of your technical orders.
Global Logistics and International Delivery
We leverage dependable international freight partners to provide tracked, secure global delivery to your facility.
This demonstration showcases the seamless installation and operation of the LS-SM551G-A6I SFP module. Users can observe its effortless insertion into a standard industrial switch port, followed by an automated link established over an extended single-mode fiber connection.
LS-SM551G-A6I Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable LS-SM551G-A6I modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
Spot on! This module is designed strictly for Single-Mode Fiber (SMF) like OS1/OS2 to achieve the massive 160km transmission distance using its 1550nm wavelength. It features a standard Duplex LC interface, making it universally compatible with standard LC-LC patch cords used in modern optical distribution frames. By
admin on
2026-05-29
A:
Absolutely! This LS-SM551G-A6I module is fully SFF-8472 MSA compliant. Our network engineers have rigorously tested it for seamless OEM compatibility across major brands like Cisco, Juniper, and Ubiquiti, ensuring true plug-and-play operation without any third-party block errors. By
admin on
2026-05-13
A:
Yes! The module complies with IEEE 802.3ah-2004 for 1.25Gbps Gigabit Ethernet, making it ideal for SCADA telemetry and remote substation backhaul. Additionally, it features built-in DOM/DDM (Digital Optical Monitoring), allowing your network management software to monitor real-time Rx/Tx power, temperature, and voltage via SNMP. By
admin on
2025-12-20
A:
Yes, it's purpose-built for extreme environments! As an Industrial-grade transceiver, it operates flawlessly within a wide temperature range of -40°C to 85°C (-40°F to 185°F). Whether deployed in winter freezes or summer heatwaves, the industrial components guarantee stable 1.25Gbps transmission without overheating or signal degradation. By
admin on
2025-07-31
As a network engineer, I demand precise DOM diagnostics. This Gigabit SFP delivers exact Rx/Tx power readings. Sourced for our multi-brand switch compatibility test, and it linked up instantly.
Please write comments with more than three
character.
478355
309974
D***l
Norway
Verified
Purchase
5 .0
2026-04-24
Bulk ordered 50 units for a major regional fiber rollout. Every single 1550nm 160km transceiver passed our rigorous optical power tests. Outstanding cost-to-performance ratio for large-scale outdoor cabinet deployments.
Please write comments with more than three
character.
478355
309972
M***r
Argentina
Verified
Purchase
5 .0
2025-03-15
We run a massive SCADA telemetry network in extreme climates. These industrial SFPs survive -40°C freezes and 85°C heatwaves perfectly. The built-in DDM makes remote optical power monitoring an absolute breeze.
Please write comments with more than three
character.
478355
309960
A***n
Switzerland
Verified
Purchase
5 .0
2024-12-01
Tested these 1.25Gbps SFP modules on a demanding 150km SMF route. The APD receiver sensitivity is incredible at -32dBm. Flawless OEM compatibility with mixed-brand edge switches. Highly recommend for telecom backhaul!
United Kingdom · English · GBP
