The LINK-PP LS-SM551G-A2I is a high-performance Gigabit SFP transceiver engineered for exceptional data reliability. Operating at 1.25Gbps, it supports long-haul single-mode fiber links. It runs on a stable 3.3V power supply with a maximum current consumption of 300mA, featuring a dual LC receptacle interface built fully to compliant SFP MSA standards.
LINK-PP Part Number
LS-SM551G-A2I
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm
Max Cable Distance
120km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver type
PIN
TX Power
0 to +5dBm
RX Power
-30 to -1dBm
Receiver Sensitivity
-28dBm
DOM Support
Yes
Operating Temperature Range
0 to 70°C
Protocols
SFF-8472 MSA Compliant, IEEE 802.3ah-2004
Key Features of LINK-PP LS-SM551G-A2I 1G SFP
This industrial-grade module offers a hot-pluggable SFP footprint, an advanced 1550nm DFB laser transmitter, and a highly sensitive Super TIA+PIN receiver. It features comprehensive internal digital diagnostic monitoring (DOM) and an ultra-wide operating temperature range from minus forty to plus eighty-five degrees Celsius.
LINK-PP LS-SM551G-A2I 1G SFP Optical Module
The LINK-PP LS-SM551G-A2I optical module delivers a cost-effective, robust hardware architecture. Combining a premium DFB laser with a trans-impedance preamplifier, this transceiver satisfies strict Class I laser safety regulations for optimal networking infrastructure.
LS-SM551G-A2I: 1G Connectivity for Urban Surveillance
Perfect for wide-area urban surveillance networks, this 1G SFP module ensures flawless video data streaming over immense distances. Its industrial-grade durability maintains constant, uninterrupted uptime under challenging outdoor environmental conditions.
LS-SM551G-A2I Module with 1550nm Wavelength
Utilizing a specialized 1550nm DFB laser wavelength, this transceiver achieves remarkably low attenuation. It minimizes signal dispersion over long fibers, delivering excellent side-mode suppression ratio performance for dense optical communications.
Engineered to conquer massive distances, this SFP module seamlessly supports up to 120km transmissions over standard single-mode fiber. It serves as a perfect solution for long-distance backhaul and metropolitan optical links.
LS-SM551G-A2I Module with Duplex LC Interface
Featuring a standard duplex LC connector, the module guarantees a secure mechanical connection. Its precise optical alignment and dual-fiber interface deliver highly efficient, low-loss optical coupling for long-haul infrastructure.
LS-SM551G-A2I Module with DOM for Real-Time Monitoring
Equipped with advanced Digital Optical Monitoring (DOM) via an I2C interface, this transceiver enables proactive management. Engineers can track real-time temperature, voltage, bias current, and precise transceiver optical power.
LINK-PP LS-SM551G-A2I 1G SFP Certification
The LS-SM551G-A2I transceiver is fully certified to meet strict global telecom baselines. It conforms to international safety regulations, verifying premium manufacturing practices and components.
Every single transceiver module undergoes a strict, multi-stage quality testing program. Our comprehensive inspection processes ensure flawless optical integrity, excellent mechanical tolerances, and reliable performance.
LS-SM551G-A2I Quality Certifications
This product proudly carries essential industry certifications, including full RoHS compliance. It satisfies rigorous environmental, safety, and physical quality standards demanded by modern enterprises.
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-A2I Certified for Reliable Host-Device Compatibility
Fully compliant with the SFP Multi-Source Agreement, this transceiver guarantees seamless compatibility. It integrates perfectly with a vast array of enterprise switches and host routers.
Rigorous Testing Ensures Reliable SFP Performance
Our rigorous, comprehensive testing protocols validate overall hardware reliability under extreme operations, guaranteeing that every single optical module performs flawlessly.
Optical Spectrum Test
This test verifies central wavelength accuracy and side-mode suppression to ensure crisp laser emissions.
Eye Pattern Test
It evaluates signal transmitter quality, confirming excellent wave amplitudes and clean optical margins.
Bit Error Rate Test
This test confirms flawless data transmission integrity, achieving a superb bit error rate.
Temperature Test
It validates consistent, reliable optical performance across extreme industrial temperature cycles.
Product Shipping for LINK-PP LS-SM551G-A2I 1G SFP
We employ premium logistics channels and professional packaging standards to ensure your optical modules arrive safely, securely, and completely intact.
Anti-Static Protective Packaging
Modules are sealed in individual anti-static bags preventing ESD damage.
Shock-Resistant Transport Protection
Cushioned multi-layer packaging shields components against intense physical vibrations.
Fast Order Processing and Dispatch
Streamlined operations ensure prompt handling, swift packaging, and speedy dispatch.
Global Logistics and International Delivery
We utilize dependable international express carriers for worldwide distribution.
LINK-PP LS-SM551G-A2I 1G SFP Usage Demonstration
This brief demonstration showcases the simple hot-plug installation of the SFP module into an active enterprise switch port, highlighting instantaneous link establishment and real-time DOM status readings via the system console.
LS-SM551G-A2I 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-A2I 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:
Hi there! We definitely support our B2B partners. For a volume order of 200 pieces, please contact our sales team via live chat or email. We'll set you up with a competitive bulk pricing tier. By
admin on
2026-01-28
A:
Spot on! The module features full DDM/DOM support compliant with the SFF-8472 standard. This allows your network engineers to monitor real-time temperature, voltage, and Tx/Rx optical power directly from your switch CLI. By
admin on
2025-10-17
A:
You will need standard Single-Mode Fiber (SMF), specifically OS1 or OS2 patch cables, terminated with Duplex LC connectors. Ensure your optical budget and splice losses are within the -28dBm receiver sensitivity limit! By
admin on
2025-09-25
A:
Yes, absolutely! Our LS-SM551G-A2I transceivers are MSA compliant and strictly tested for wide OEM compatibility across major brands like Cisco, Ubiquiti, and Juniper. Plug and play! By
admin on
2025-08-20
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478341
310080
S***n
United States
Verified
Purchase
5 .0
2026-04-24
As a network engineer, I demand strict MSA compliance. These 1550nm long-haul transceivers passed our core router validation instantly. The -30 to -1dBm RX range easily accommodated our complex base station backhaul architecture without attenuators.
Please write comments with more than three
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478341
310088
J***e
Argentina
Verified
Purchase
5 .0
2025-08-01
Installed a batch of these industrial 1G 1550nm SFPs in our outdoor telecom cabinets. Working seamlessly alongside major brand switches. The DDM/DOM feature gives precise real-time Tx/Rx power metrics. Highly recommend for enterprise ISP!
Please write comments with more than three
character.
478341
310078
M***s
Czech Republic
Verified
Purchase
5 .0
2025-07-14
Excellent long-reach optical transceiver for 120km SMF links. We use IEEE 802.3ah-2004 protocol for campus ring topologies. Link budgets hold perfectly with DFB lasers even after splicing. Great alternative to expensive name-brand OEM optics.
Please write comments with more than three
character.
478341
310093
A***n
Ukraine
Verified
Purchase
5 .0
2024-12-17
Integrated this 1.25G SFP module into my home lab 10G/1G NAS setup using duplex LC patch cords. Absolutely zero Tx/Rx drops during heavy data replication. Runs super cool in a fanless switch enclosure. (^_^)
Singapore · English · SGD
