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LINK-PP LS-SM312G-20I 2.5G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
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LINK-PP LS-SM312G-20I 2.5G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

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Product summary

Product
LINK-PP LS-SM312G-20I 2.5G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)
SKU
183290
P/N
LS-SM312G-20I
Price
$ 7.06
Stock
550 in Stock
Sold
1.5K
Product URL
https://www.l-p.com/products/478272.htm
For Order Over $1000 Get $15.00 Off , Code: Linkpp15
For Order Over $3000 Get $50.00 Off , Code: Linkpp50
For Order Over $5000 Get $100.00 Off , Code: Linkpp100
New Users: $10 Coupon for Orders , Code: linkpp2610
42 Reviews
5 Questions
1.5K Sold
$ 7.06 ( 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
1
$ 7.06
100
$ 6.707
1000
$ 6.496
3000
$ 6.284
6000
$ 6.072
Manufacture: LINK-PP P/N: LS-SM312G-20I SKU: 183290
Compatible:
LINK-PP
Compatible P/N:
LS-SM312G-02C | 2km
LS-SM312G-02I | 2km
LS-SM312G-10C | 10km
LS-SM312G-10I | 10km
LS-SM312G-15C | 15km
LS-SM312G-20C | 20km
LS-SM312G-20I | 20km
LS-SM312G-40C | 40km
LS-SM312G-40I | 40km
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.
Stock:
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LINK-PP LS-SM312G-20I 2.5G SFP Specifications

The LINK-PP LS-SM312G-20I is a high-performance 2.5G SFP optical transceiver designed for single-mode fiber communications. Featuring a 1310nm DFB transmitter, PIN photo-detector, and duplex LC connector, this hot-pluggable module supports data rates up to 2.5Gbps over distances up to 20km. Engineered for harsh industrial environments, it operates reliably across temperatures from -40°C to +85°C.

LINK-PP Part Number LS-SM312G-20I Vendor Name LINK-PP
Form Factor SFP Max Data Rate 2.5Gbps
Wavelength 1310nm Max Cable Distance 20km
Connector Duplex LC Media SMF
Transmitter Type DFB Receiver Type PIN
Receiver Sensitivity -18dBm DDM/DOM Supported
TX Power -6 to +1dBm RX Power -20 to -1dBm
Operating Temperature Range -40 to 85°C Protocols MSA Compliant

Key Features of LINK-PP LS-SM312G-20I 2.5G SFP

This 2.5G SFP transceiver features hot-swappable deployment, SFF-8472 digital diagnostic monitoring (DDM), and full compliance with SFP MSA standards. Built with a single 3.3V power supply and low power consumption, it ensures exceptional operational efficiency, robust signal integrity, and seamless network integration across industrial applications.

LINK-PP LS-SM312G-20I 2.5G SFP Optical Module

Engineered for high-speed optical networking, this 2.5Gbps SFP transceiver module delivers cost-effective and low-latency fiber connectivity. It enables secure data transmission for enterprise switches, routers, optical transport platforms, and Fiber Channel storage systems.

LS-SM312G-20I: 2.5G Connectivity for Metropolitan Area Networks

Optimized for metropolitan area networks (MANs) and telecom infrastructure, this 2.5G optical module provides robust bandwidth for Ethernet backhaul and optical links. Its high reliability guarantees consistent data throughput across urban networking frameworks.

LS-SM312G-20I Module with 1310nm Wavelength

Utilizing an advanced 1310nm DFB laser diode, this single-mode SFP module achieves minimal chromatic dispersion and tight spectral width. This optical performance ensures precise signal propagation and reduced optical loss over single-mode fiber links.

LS-SM312G-20I Module Supporting 20km Transmission

Capable of reaching up to 20km over standard single-mode fiber (SMF), this transceiver bridges long-distance network segments seamlessly. It eliminates the need for intermediate optical amplifiers, significantly lowering infrastructure deployment costs.

LS-SM312G-20I Module with Duplex LC Interface

Designed with an industry-standard duplex LC receptacle, the optical module establishes a tight, low-loss latching connection with standard LC patch cables, ensuring stable high-speed optical signal transmission across demanding network setups.

LS-SM312G-20I Module with DOM for Real-Time Monitoring

Featuring real-time Digital Optical Monitoring (DOM), this transceiver allows network administrators to continuously track operating parameters including operating temperature, supply voltage, laser bias current, transmitted optical power, and received optical power.

LINK-PP LS-SM312G-20I 2.5G SFP Certification

Certified under CE, FCC, UKCA, UL, REACH, and RoHS compliance, this 2.5G SFP module meets strict global regulatory standards for electrical safety, electromagnetic compatibility, and environmental protection.

Optical Transceivers Testing

LS-SM312G-20I Quality Testing Program

Our comprehensive quality assurance program subjects every optical transceiver to rigorous functional, optical, and environmental evaluations, guaranteeing zero-defect performance and long-term operating reliability prior to shipment.

LS-SM312G-20I Quality Certifications

Adhering to international manufacturing protocols, our quality certifications affirm Class 1 laser safety requirements alongside Class B electromagnetic radiation standards to safeguard network hardware environments.

ISO9001
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
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.
ISO14001
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
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
RECH
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.
CE
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.
FCC
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
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.
UKCA
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
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-SM312G-20I Certified for Reliable Host-Device Compatibility

Fully compliant with Multi-Source Agreements (MSA), this transceiver undergoes extensive inter-vendor compatibility testing to guarantee seamless plug-and-play operation across major brand switches, routers, and converters.

Rigorous Testing Ensures Reliable SFP Performance

Every transceiver undergoes comprehensive factory testing protocols to verify optical efficiency, electrical stability, signal integrity, and long-term durability in extreme conditions.

Optical

Optical Spectrum Test

Spectrum analysis verifies center wavelength accuracy, spectral width, and side-mode suppression ratio compliance.

Optical

Eye Pattern Test

High-speed oscilloscope testing confirms clean eye mask margin and low jitter performance.

Optical

Bit Error Rate Test

Rigorous bit error rate testing guarantees error-free data transmission at full 2.5Gbps bandwidth.

Optical

Temperature Test

Thermal chamber testing validates reliable optical operation across industrial temperatures from -40°C to +85°C.

Product Shipping for LINK-PP LS-SM312G-20I 2.5G SFP

We utilize industry-grade protective packaging and reliable global logistics channels to ensure safe, swift, and undamaged delivery to your facility.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Individual anti-static ESD packaging shields delicate optical components against electrostatic discharge.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Cushioned outer boxes absorb impact and vibration during transit and shipping.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Streamlined warehouse operations ensure prompt order verification and rapid dispatch times.

Global Logistics and International Delivery

Global Logistics and International Delivery

Express international courier partnerships guarantee trackable worldwide shipping and delivery.

LINK-PP LS-SM312G-20I 2.5G SFP Usage Demonstration

Deploying this 2.5G SFP transceiver is straightforward: align the hot-swappable module with your host switch port, slide it firmly until latched, remove the dust plug, and connect a duplex LC single-mode fiber patch cord.

LS-SM312G-20I 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

Pre-Sales Technical Consultation

Professional technical guidance to help customers select the most suitable LS-SM312G-20I modules based on network architecture and application requirements.

Compatibility Verification Support

Compatibility Verification Support

Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.

Deployment & Installation Assistance

Deployment & Installation Assistance

Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.

Long-Term Technical Assurance

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.

LINK-PP LS-SM312G-20I 2.5G SFP 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

Model Comparison Table

LS-SM312G-20I
Current Model
LS-SM312G-20I
LS-SM312G-10I
LS-SM312G-10I
LS-SM312G-15C
LS-SM312G-15C
LS-SM312G-40I
LS-SM312G-40I
LS-SM552G-80I
LS-SM552G-80I
LS-SM312G-02I
LS-SM312G-02I
Compatible
LINK-PP
LINK-PP
LINK-PP
LINK-PP
LINK-PP
LINK-PP
Data Rate (Max)
2.5Gbps
2.5Gbps
2.5Gbps
2.5Gbps
2.5Gbps
2.5Gbps
Wavelength
1310nm
1310nm
1310nm
1310nm
1550nm
1310nm
Connector
Duplex LC
Duplex LC
Duplex LC
Duplex LC
Duplex LC
LC duplex
Cable Distance (Max)
20km
10km
15km
40km
80km
2km
Cable Type
SMF
SMF
SMF
SMF
SMF
SMF
TX Power
-6 to +1dBm
-6 to +1dBm
-6 to +1dBm
-2 to +3dBm
-2 to +3dBm
-10 to -3dBm
Receiver Sensitivity
-20 to -1dBm
-20 to -1dBm
-20 to -1dBm
-20 to -1dBm
-20 to -1dBm
-20 to -1dBm
Operating Temperature
-40 to 85°C
-40 to 85°C
0 to 70°C
-40 to 85°C
-40 to 85°C
Form Factor
SFP
SFP
SFP
SFP
SFP
SFP
Transmitter Type
DFB
DFB
DFB
DFB
DFB
FP 1310nm
Receiver Type
PIN
PIN
PIN
PIN
APD
DDM/DOM
Supported
Supported
Supported
Supported
Supported
Protocols
MSA Compliant
MSA Compliant
MSA Compliant
MSA Compliant
MSA Compliant
MSA Compliant
Action

LINK-PP

  1. 2.5G SFP
  2. SFP-2GSR-31
  3. SMF Transceiver Module

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Product Drawing LS-SM312G-20I.pdf Download

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C***z
Colombia
Verified Purchase
5 .0
2026-08-08
Perfect OEM compatible SFP for our multi-brand setup. Recognized instantly by Cisco and Juniper switches. Using them for datacenter interconnect and latency is basically non-existent. Great value.
40 Helpful vote Comments
C***l
Russian Federation
Verified Purchase
5 .0
2026-05-27
Flawless 1310nm wavelength stability.
171 Helpful vote Comments
R***n
Costa Rica
Verified Purchase
5 .0
2026-04-22
Solid performance for datacenter interconnect.
89 Helpful vote Comments
A***g
Venezuela
Verified Purchase
5 .0
2026-04-20
Perfect Tx/Rx power levels.
139 Helpful vote Comments
S***s
Germany
Verified Purchase
4 .0
2026-03-14
Packaging was slightly bent, but the 2.5G SFP module works perfectly.
5 Helpful vote Comments
M***z
Philippines
Verified Purchase
5 .0
2026-01-26
OEM compatibility is spot on! Smoothly integrated into our Arista campus fiber network.
92 Helpful vote Comments
S***r
Italy
Verified Purchase
5 .0
2026-01-21
The DOM feature is super accurate. Great for monitoring our outdoor rack setups.
57 Helpful vote Comments
J***s
Indonesia
Verified Purchase
5 .0
2026-01-14
Perfect 20km transmission distance.
102 Helpful vote Comments
K***n
Bolivia
Verified Purchase
5 .0
2026-01-01
Best industrial 2.5G SFP module! ✨
112 Helpful vote Comments
T***e
Mexico
Verified Purchase
5 .0
2025-12-13
Massive cost savings for bulk IT procurement. Performance rivals expensive name brands easily.
128 Helpful vote Comments
S***s
Thailand
Verified Purchase
5 .0
2025-12-12
Tested these LINK-PP LS-SM312G-20I modules in our outdoor cabinet. The industrial temp spec is legit. DOM monitoring shows stable Tx/Rx power over 20km SMF. Highly recommended!
111 Helpful vote Comments
W***n
Finland
Verified Purchase
5 .0
2025-12-06
Fast shipping, great Ethernet protocol support. ⚡
136 Helpful vote Comments
P***r
Italy
Verified Purchase
5 .0
2025-12-03
Upgraded my home 2.5G NAS setup. The duplex LC interface clicked perfectly.
105 Helpful vote Comments
D***s
Italy
Verified Purchase
5 .0
2025-11-15
Excellent 2.5Gbps link speed and DOM!
153 Helpful vote Comments
M***h
Denmark
Verified Purchase
4 .0
2025-11-05
Delivery delayed by a day, yet the 20km SMF performance is solid.
6 Helpful vote Comments
R***r
Canada
Verified Purchase
5 .0
2025-10-02
Great for my home 2.5G NAS.
38 Helpful vote Comments
K***z
Pakistan
Verified Purchase
5 .0
2025-08-30
Best industrial optical module 1310nm for the price. Works perfectly right out the box!
56 Helpful vote Comments
B***r
Viet Nam
Verified Purchase
5 .0
2025-08-28
Deployed 50 pieces for campus fiber network expansion. These 1310nm 2.5G transceivers maintain excellent signal integrity. No dropouts across the entire network, even under heavy Ethernet protocol load.
195 Helpful vote Comments
J***z
Mexico
Verified Purchase
5 .0
2025-08-18
Works perfectly with single-mode LC fiber. Awesome datacenter fiber networking gear overall.
102 Helpful vote Comments
J***z
Sweden
Verified Purchase
5 .0
2025-08-01
Incredible value for B2B procurement! The LINK-PP 2.5G module delivers flawless 20km single-mode transmission. DOM diagnostics are extremely precise, making remote base station backhaul maintenance a breeze. (≧◡≦)
156 Helpful vote Comments
J***s
Russian Federation
Verified Purchase
5 .0
2025-07-30
Duplex LC fiber interface works flawlessly.
105 Helpful vote Comments
L***n
Norway
Verified Purchase
5 .0
2025-07-16
Great wide operating temperature range. It survives our unventilated warehouse switch cabinets perfectly.
157 Helpful vote Comments
J***s
Republic of Korea
Verified Purchase
5 .0
2025-07-15
Recognized instantly by my switch.
45 Helpful vote Comments
C***s
Costa Rica
Verified Purchase
5 .0
2025-07-12
Perfect OEM compatible SFP module. ✌️
70 Helpful vote Comments
N***r
United States
Verified Purchase
5 .0
2025-06-13
Good Tx/Rx stability. Ideal for our remote base station backhaul projects this year.
63 Helpful vote Comments
K***g
Bulgaria
Verified Purchase
5 .0
2024-06-16
Excellent, Fast shipping, well packed, good protection
80 Helpful vote Comments
D***s
Ukraine
Verified Purchase
5 .0
2024-05-19
easy to use; easy to order; great prices
70 Helpful vote Comments
M***a
Maldives
Verified Purchase
5 .0
2024-05-07
Found the best price for the product I purchased without sacrificing quality. Very satisfied.
27 Helpful vote Comments
S***n
Nepal
Verified Purchase
5 .0
2024-02-15
Super, I will order here, I advise everyone
16 Helpful vote Comments
J***o
Spain
Verified Purchase
5 .0
2024-01-15
Works very well. I would recommend this to anyone.
55 Helpful vote Comments
H***g
Canada
Verified Purchase
5 .0
2024-01-08
Very pleased with the selection and pricing!
56 Helpful vote Comments
M***n
Japan
Verified Purchase
5 .0
2023-10-08
high quality item & super Fast shipping
63 Helpful vote Comments
T***t
Taiwan, Province of China
Verified Purchase
5 .0
2023-10-01
Worked fine on Brocade switches. Compatibility is no problem.
88 Helpful vote Comments
M***k
Thailand
Verified Purchase
5 .0
2023-09-22
Product was as advertised ... communication regarding shipment and delivery was excellent.
30 Helpful vote Comments
L***t
United States
Verified Purchase
5 .0
2023-09-11
The customer service is very friendly and helpful. I highly recommend LINK-PP to everyone.
61 Helpful vote Comments
M***w
India
Verified Purchase
5 .0
2023-09-08
The prices were extremely reasonable and there was a huge range of products to chose from.
40 Helpful vote Comments
E***e
Hong Kong
Verified Purchase
5 .0
2023-08-18
Quick delivery and well packagedNeeded to contact them to change delivery address, service was very good
45 Helpful vote Comments
y***l
Malaysia
Verified Purchase
5 .0
2023-08-16
Placed a few orders over the years with Link-PP. Their customers service have been brilliant and very helpful in the past and I always found the prices very competitive.
27 Helpful vote Comments
E***e
United States
Verified Purchase
5 .0
2023-08-14
Website easy to navigate and clear. Product info is comprehensive. Fast delivery and paperwork emailed rapidly. Great.
43 Helpful vote Comments
K***y
Republic of Korea
Verified Purchase
5 .0
2023-07-12
Outstanding place to shop. I have done business there before and will do as my need requires.
12 Helpful vote Comments
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LINK-PP LS-SM312G-20I 2.5G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

LINK-PP LS-SM312G-20I 2.5G SFP 1310nm 20km Duplex LC DOM SMF Optical Transceiver Module (Industrial)

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