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LS-BL31551G-60I 1.25g sfp bidi 1310nm-tx 1550nm-rx 60km simplex lc ddm smf optical transceiver module (industrial)
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LINK-PP LS-BL31551G-60I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 60km Simplex LC DDM SMF Optical Transceiver Module (Industrial)

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Product summary

Product
LINK-PP LS-BL31551G-60I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 60km Simplex LC DDM SMF Optical Transceiver Module (Industrial)
SKU
201978
P/N
LS-BL31551G-60I
Price
$ 16.5
Stock
150 in Stock
Sold
1
Product URL
https://www.l-p.com/products/491462.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
46 Reviews
4 Questions
1 Sold
$ 16.5 ( 0% OFF )
Free shipping. For wholesale pricing, please contact us directly.
Qty (pcs) :
Unit Price :
1
$ 16.5
100
$ 15.675
1000
$ 15.18
3000
$ 14.685
6000
$ 14.19
Manufacture: LINK-PP P/N: LS-BL31551G-60I SKU: 201978
Compatible:
LINK-PP
Compatible P/N:
LS-BL31551G-02C | 2km
LS-BL55311G-02C | 2km
LS-BL31551G-03C | 3km
LS-BL31551G-03I | 3km
LS-BL55311G-03C | 3km
LS-BL55311G-03I | 3km
LS-BL31491G-10C | 10km
LS-BL31491G-10I | 10km
LS-BL31551G-10C | 10km
LS-BL31551G-10I | 10km
LS-BL31551GE-10C | 10km
LS-BL49311G-10C | 10km
LS-BL49311G-10I | 10km
LS-BL49551G-10C | 10km
LS-BL49551G-10I | 10km
LS-BL55311G-10C | 10km
LS-BL55311G-10I | 10km
LS-BL55311GE-10C | 10km
LS-BL55491G-10C | 10km
LS-BL55491G-10I | 10km
LS-BL31551G-15C | 15km
LS-BL31491G-20C | 20km
LS-BL31491G-20I | 20km
LS-BL31551G-20C | 20km
LS-BL31551G-20I | 20km
LS-BL49311G-20C | 20km
LS-BL49311G-20I | 20km
LS-BL49551G-20C | 20km
LS-BL55311G-20C | 20km
LS-BL55311G-20I | 20km
LS-BL55491G-20C | 20km
LS-BL31491G-40C | 40km
LS-BL31491G-40I | 40km
LS-BL31551G-40C | 40km
LS-BL31551G-40I | 40km
LS-BL49311G-40C | 40km
LS-BL49311G-40I | 40km
LS-BL55311G-40C | 40km
LS-BL55311G-40I | 40km
LS-BL31551G-60C | 60km
LS-BL31551G-60I | 60km
LS-BL49551G-60C | 60km
LS-BL55311G-60C | 60km
LS-BL55311G-60I | 60km
LS-BL55491G-60C | 60km
LS-BL27331G-80C | 80km
LS-BL33271G-80C | 80km
LS-BL49551G-80C | 80km
LS-BL49551G-80I | 80km
LS-BL55491G-80C | 80km
LS-BL55491G-80I | 80km
LS-BL49551G-A0C | 100km
LS-BL49551G-A0I | 100km
LS-BL55491G-A0C | 100km
LS-BL55491G-A0I | 100km
LS-BL49551G-A2C | 120km
LS-BL49551G-A2I | 120km
LS-BL55491G-A2C | 120km
LS-BL55491G-A2I | 120km
LS-BL49551G-A5C | 150km
LS-BL49551G-A5I | 150km
LS-BL55491G-A5C | 150km
LS-BL55491G-A5I | 150km
LS-BL49551G-A6C | 160km
LS-BL49551G-A6I | 160km
LS-BL55491G-A6C | 160km
LS-BL55491G-A6I | 160km
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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Quantity:
( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )
Total Price:
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LINK-PP LS-BL31551G-60I 1.25G BiDi SFP Specifications

The LINK-PP LS-BL31551G-60I is a high-performance 1.25G BiDi SFP transceiver engineered for robust industrial applications. This single-mode fiber optical module seamlessly supports Gigabit Ethernet and 1.063Gbps Fiber Channel speeds. Delivering exceptional reliability across harsh environments, this hot-pluggable SFP footprint ensures rapid networking upgrades, minimal data latency, and outstanding operational stability.

LINK-PP Part Number LS-BL31551G-60I Vendor Name LINK-PP
Form Factor SFP Max Data Rate 1.25Gbps
Wavelength 1310nm-TX/1550nm-RX Max Cable Distance 60km
Connector Simplex LC Media SMF
Transmitter Type DFB Receiver Type

PIN
TX Power -5 to 0dBm RX Power -23 to -1dBm
Receiver Sensitivity <-24dBm DDM Support Yes
Operating Temperature Range -40 to 85°C Protocols

Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Key Features of LINK-PP LS-BL31551G-60I 1.25G BiDi SFP

Designed with advanced WDM technology, this hot-pluggable SFP module enables efficient bidirectional transmission over a single optical fiber. With low power consumption and a durable metal casing, it offers exceptional EMI shielding, ensuring consistent network performance and significantly reducing overall deployment costs.

LINK-PP LS-BL31551G-60I 1.25G BiDi SFP Optical Module

This versatile 1000Base-BX Gigabit optical transceiver operates on a single +3.3V power supply. It guarantees superior signal integrity for long-haul telecommunications, making it an ideal choice for enterprise broadband connections and reliable data center interconnections.

LS-BL31551G-60I: 1.25G Connectivity for Industrial Security Network

Built to withstand extreme temperatures ranging from -40°C to +85°C, this industrial-grade module is perfect for harsh environments. It guarantees stable surveillance connectivity, factory automation operations, and outdoor security networking without physical performance degradation.

LS-BL31551G-60I Module with 1310nm-TX and 1550nm-RX Wavelength

Utilizing advanced optical wavelengths, it integrates a high-quality 1310nm DFB laser transmitter and a highly sensitive 1550nm PIN photodiode receiver. This configuration optimizes bandwidth utilization while effectively mitigating chromatic dispersion in single-mode fiber networks.

LS-BL31551G-60I Module Supporting 60km Transmission

Engineered for extended long-haul network architectures, this powerful transceiver facilitates a maximum 60km SMF transmission distance. It effectively connects remote campuses, wide area networks, and metropolitan hubs by maintaining superior optical fiber link integrity.

LS-BL31551G-60I Module with Simplex LC Interface

Featuring a standard simplex LC receptacle, this single fiber connector design efficiently handles both receiving and transmitting data streams. This greatly saves cabling costs while simplifying dense fiber management within complex telecommunication patching environments.

LS-BL31551G-60I Module with DDM for Real-Time Monitoring

Fully SFF-8472 compliant, the built-in Digital Diagnostic Monitoring function enables administrators to check transceiver status continuously. This real-time DDM support tracks temperature, voltage, laser bias current, and optical power to ensure proactive network maintenance.

LINK-PP LS-BL31551G-60I 1.25G SFP Certification

Meeting stringent industry standards and SFP MSA compliance, this optical device guarantees global safety and regulatory adherence, empowering your networking infrastructure with certified, industry-leading operational reliability.

Optical Transceivers Testing

LS-BL31551G-60I Quality Testing Program

Our strict quality control ensures every unit is thoroughly factory tested. This comprehensive verification program guarantees that your networking equipment maintains peak performance during critical data transmission.

LS-BL31551G-60I Quality Certifications

This robust transceiver is proudly CE, FCC, UKCA, UL, and REACH compliant. Furthermore, it strictly adheres to the RoHS directive, ensuring environmentally friendly materials and absolute operational safety.

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-BL31551G-60I Certified for Reliable Host-Device Compatibility

Designed for seamless integration, this multi-source agreement module guarantees exceptional interoperability with major brand switches, enterprise routers, and server adapters to simplify your complex hardware network deployments.

Rigorous Testing Ensures Reliable SFP Performance

We conduct comprehensive evaluation procedures to guarantee long-term module stability and exceptional data throughput for every manufactured optical networking component.

Optical

Optical Spectrum Test

Confirms precise wavelength output and stable central emission to prevent signal interference.

Optical

Eye Pattern Test

Verifies signal clarity and extremely low jitter for dependable high-speed data communications.

Optical

Bit Error Rate Test

Ensures absolute zero packet loss and error-free transmission over maximum fiber distances.

Optical

Temperature Test

Simulates intensive thermal cycling to validate hardware resilience in extreme industrial climates.

Product Shipping for LINK-PP LS-BL31551G-60I 1.25G SFP

We implement secure delivery protocols and safe transport methodologies, ensuring your sensitive telecommunication equipment arrives flawlessly intact and ready for immediate deployment.

Anti-Static Protective Packaging

Anti-Static Protective Packaging

Premium ESD bags shield internal components from dangerous electrostatic discharge incidents effectively.

Shock-Resistant Transport Protection

Shock-Resistant Transport Protection

Customized protective foam firmly secures the optical modules to prevent physical damage.

Fast Order Processing and Dispatch

Fast Order Processing and Dispatch

Streamlined fulfillment provides extremely quick handling and rapid dispatch for urgent projects.

Global Logistics and International Delivery

Global Logistics and International Delivery

Reliable express carriers ensure seamless and fully trackable worldwide international shipping solutions.

LINK-PP LS-BL31551G-60I 1.25G SFP Usage Demonstration

Featuring convenient plug and play installation, administrators simply insert the transceiver into an empty network switch port. The hot-swappable design allows immediate fiber optic patching without powering down the entire network, minimizing system maintenance downtime significantly.

LS-BL31551G-60I 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-BL31551G-60I 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-BL31551G-60I 1.25G 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-BL31551G-60I
Current Model
LS-BL31551G-60I
LS-BL31551G-40I
LS-BL31551G-40I
LS-BL31551G-03I
LS-BL31551G-03I
LS-BL31551G-15C
LS-BL31551G-15C
LS-BL31551G-20I
LS-BL31551G-20I
LS-BL31551G-10I
LS-BL31551G-10I
Compatible
LINK-PP
LINK-PP
LINK-PP
LINK-PP
LINK-PP
LINK-PP
Data Rate (Max)
1.25Gbps
1.25Gbps
1.25Gbps
1.25Gbps
1.25Gbps
1.25Gbps
Wavelength
1310nm-TX/1550nm-RX
1310nm-TX/1550nm-RX
1310nm-TX/1550nm-RX
1310nm-TX/1550nm-RX
1310nm-TX/1550nm-RX
1310nm-TX/1550nm-RX
Connector
Simplex LC
Simplex LC
Simplex LC
Simplex LC
Simplex LC
Simplex LC
Cable Distance (Max)
60km
40km
3km
15km
20km
10km
Cable Type
SMF
SMF
SMF
SMF
SMF
SMF
TX Power
-5 to 0dBm
-5 to 0dBm
-15 to -8dBm
-5 to 0dBm
-9 to 0dBm
-9 to 0dBm
Receiver Sensitivity
-23 to -1dBm
-23 to -1dBm
-23 to -1dBm
-23 to -1dBm
-23 to -1dBm
-23 to -1dBm
Operating Temperature
-40 to 85°C
-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
FP
FP
FP
FP
Receiver Type
PIN
PIN
PIN
PIN
PIN
PIN
DDM Support
Yes
Protocols
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Action

LINK-PP

  1. 1G SFP BiDi
  2. 1G SFP Transceiver
  3. Optical Transceiver Module

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Download
Product Drawing LS-BL31551G-60I.pdf Download

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M***e
Greece
Verified Purchase
5 .0
2026-06-10
Plug and play! BiDi 1310nm/1550nm works exactly as expected for my home Gigabit NAS.
176 Helpful vote Comments
L***e
Philippines
Verified Purchase
5 .0
2026-05-22
Great industrial SFP module! Handles the heat in our non-A/C warehouse just fine.
97 Helpful vote Comments
P***k
Portugal
Verified Purchase
5 .0
2026-05-03
Handled -40°C easily. Very reliable!
155 Helpful vote Comments
S***r
Ireland
Verified Purchase
5 .0
2026-03-30
We use these for base station backhaul links in extreme weather (-40°C). The 1310nm-TX/1550nm-RX split over single-mode fiber is highly stable. Real lifesaver for industrial IoT ops.
211 Helpful vote Comments
P***n
Switzerland
Verified Purchase
5 .0
2026-03-07
Tested the 1.25G SFP BiDi transceivers across multi-brand switches including Juniper and Ubiquiti. Seamless MSA OEM compatibility. Built-in DOM tracks the -40 to 85°C operating temperature perfectly. Highly recommend.
109 Helpful vote Comments
J***s
Taiwan, Province of China
Verified Purchase
5 .0
2026-03-06
Works beautifully in our campus fiber network.
140 Helpful vote Comments
P***n
Bolivia
Verified Purchase
5 .0
2026-02-20
Excellent Gigabit Ethernet module! ^^
152 Helpful vote Comments
P***n
Argentina
Verified Purchase
4 .0
2026-01-11
Packaging was slightly dented upon arrival, but the 1.25G industrial SFP works perfectly.
215 Helpful vote Comments
E***n
Colombia
Verified Purchase
5 .0
2025-11-08
Cost-effective solution for our enterprise networking. LC fiber interface snapped in with zero issues.
156 Helpful vote Comments
C***y
Argentina
Verified Purchase
5 .0
2025-09-26
Fast and easy to find the product I was looking for and no annoying pop up while I filled in the required data.
102 Helpful vote Comments
R***r
Dominican Republic
Verified Purchase
5 .0
2025-08-22
Upgraded our data center mass deployment with these Simplex LC modules. Reaching 60km over SMF without signal drops is impressive. Perfect for linking our remote NAS backup servers.
149 Helpful vote Comments
A***z
Czech Republic
Verified Purchase
5 .0
2025-07-17
Quick shipping and the Fast Ethernet optical performance is top tier. Will buy again!
53 Helpful vote Comments
N***g
Macao
Verified Purchase
5 .0
2025-07-13
Great website, great selection at the cheapest prices I can find for the products they have.Link-pp always provides easy to use and reliable service.
80 Helpful vote Comments
M***e
United Kingdom
Verified Purchase
4 .0
2025-07-07
Tested on the following.
56 Helpful vote Comments
C***n
Israel
Verified Purchase
5 .0
2025-07-05
Outstanding service. Not my first order and certainly not my last. Transceiver guaranteed to work and it always does.
46 Helpful vote Comments
J***z
India
Verified Purchase
5 .0
2025-06-23
Perfect 60km SMF transmission distance!
110 Helpful vote Comments
W***l
United Kingdom
Verified Purchase
5 .0
2025-06-09
Flawless 1.25G connection for outdoor cabinet setups. Wide temp range is a huge plus! ❄️
141 Helpful vote Comments
A***e
Germany
Verified Purchase
5 .0
2025-06-04
Deployed these LS-BL31551G-60I modules for a 60km campus fiber networking project. DDM monitoring is incredibly accurate, and they sync flawlessly with our Cisco core switches. Great for outdoor cabinets!
169 Helpful vote Comments
S***e
Ecuador
Verified Purchase
5 .0
2025-05-19
Solid 1.25G industrial SFP transceiver.
133 Helpful vote Comments
R***s
Venezuela
Verified Purchase
5 .0
2025-05-14
Accurate 1310nm-TX/1550nm-RX wavelengths.
91 Helpful vote Comments
J***s
Poland
Verified Purchase
5 .0
2025-05-04
Solid OEM compatibility. Fired right up on our MSA compliant factory floor switches.
60 Helpful vote Comments
A***a
Taiwan, Province of China
Verified Purchase
5 .0
2025-03-04
Had just what I needed and an honest shipping policy. Thanks!
36 Helpful vote Comments
T***g
United States
Verified Purchase
5 .0
2025-01-17
Units worked just as they said, had no issues so far.
42 Helpful vote Comments
A***a
Singapore
Verified Purchase
5 .0
2025-01-15
You can trust in l-p.com, cause you will always get your order promptly. Love them.
15 Helpful vote Comments
J***k
Belgium
Verified Purchase
5 .0
2024-12-14
Flawless multi-brand switch compatibility test.
84 Helpful vote Comments
M***s
Czech Republic
Verified Purchase
5 .0
2024-12-04
SFP BiDi 60km range is real. DDM stats look great in our monitoring dashboard.
198 Helpful vote Comments
A***s
Indonesia
Verified Purchase
5 .0
2024-11-09
Great DDM support and easy to install.
88 Helpful vote Comments
I***e
Germany
Verified Purchase
5 .0
2024-10-25
The Optical Transceiver Module was packed very well. It works as expected.
56 Helpful vote Comments
V***l
Maldives
Verified Purchase
5 .0
2024-07-01
Price is less than half of what Pulse charges for their brand. But both the quality and the performance are the same. Why not choose the cheaper ones? Besides,the sales person is very knowledgable and helpful.
54 Helpful vote Comments
M***u
United States
Verified Purchase
5 .0
2023-11-02
Products and services are very good
96 Helpful vote Comments
C***k
Republic of Korea
Verified Purchase
5 .0
2023-09-29
Orders are have always been correct every time I have ordered from here, which has been several times. High quality products and they are always in-stock. Website and check is streamlined perfectly.
54 Helpful vote Comments
D***n
United States
Verified Purchase
5 .0
2023-09-22
Came Fast and in good condition
94 Helpful vote Comments
M***s
Norway
Verified Purchase
5 .0
2023-09-14
Package arrived on time, and Optical Transceiver Module work perfectly.
82 Helpful vote Comments
R***D
Belarus
Verified Purchase
4 .0
2023-09-02
Personal service like I've never seen from an on-line store.
41 Helpful vote Comments
J***R
Sweden
Verified Purchase
5 .0
2023-08-27
This is a great site. It was very easy to place an order.
32 Helpful vote Comments
S***s
Singapore
Verified Purchase
5 .0
2023-08-20
Quick to provide a quote, easy to work with, and the product shipped promptly.
78 Helpful vote Comments
K***m
United Arab Emirates
Verified Purchase
5 .0
2023-08-10
Quality modules with Warranty/Support, reliable.
28 Helpful vote Comments
S***m
Thailand
Verified Purchase
5 .0
2023-05-13
Price was good. Delivery was Fast. Quality appears to be good. I would definitely recommend this site.
85 Helpful vote Comments
B***g
Indonesia
Verified Purchase
5 .0
2023-02-21
My PCB can accept it very well and work perfectly. A painless experience - easy to find the items, easy to order it, and well packed and shipped.
22 Helpful vote Comments
J***e
New Zealand
Verified Purchase
5 .0
2023-02-13
Great seller, Fast shipping, best price. Regards
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LS-BL31551G-60I 1.25g sfp bidi 1310nm-tx 1550nm-rx 60km simplex lc ddm smf optical transceiver module (industrial)

LINK-PP LS-BL31551G-60I 1.25G SFP BiDi 1310nm-TX/1550nm-RX 60km Simplex LC DDM SMF Optical Transceiver Module (Industrial)

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