What are the main benefits of the LINK-PP LS-SM554G-40I 4.25G SFP?

This compact industrial transceiver offers a 4.25 Gbps data rate, 1550 nm long-wavelength operation, 40 km reach over single-mode fiber, a duplex LC connector, and full DOM support for real-time performance monitoring.

What fiber type does it require?

It is designed exclusively for single-mode fiber (SMF).

What is the module’s longest transmission distance?

It supports transmission distances up to 40 km under standard optical budget conditions.

Where is this module typically deployed?

It is commonly used in SANs (1x/2x/4x Fibre Channel), industrial automation, metropolitan area networks, campus backbones, telecom infrastructure, video surveillance backbones, and utility communication networks.

Can these 1550nm 40 km Fibre Channel SFP modules be used over standard OS2 single-mode fiber, and has anyone successfully deployed them in outdoor industrial cabinets operating close to -40°C while maintaining stable Fibre Channel performance?

Yes. This module is designed for transmission over standard single-mode fiber with a maximum reach of 40 km. The industrial version supports an operating temperature range of -40°C to +85°C, making it suitable for outdoor cabinets, factory automation, utility networks, and other harsh environments. When installed within the specified optical power budget and supported Fibre Channel standards, it delivers stable long-term performance.

Has anyone tested this module with Cisco MDS, Brocade, IBM, or other OEM Fibre Channel switches? Any compatibility issues during long-term production use?

Yes. The LS-SM554G-40I is manufactured in compliance with the MSA standard and supports OEM coding for a wide range of Fibre Channel platforms. It has been widely deployed with Cisco, Brocade, IBM, and other compatible storage networking equipment. If you have a specific switch model, feel free to contact us and we'll verify compatibility before shipment.

We're planning a storage upgrade requiring around 150 modules. Does LINK-PP offer better pricing for bulk purchases or support custom OEM labels for large projects?

Absolutely. We provide volume discounts for enterprise and system integrator projects. OEM labeling, customized EEPROM coding, private branding, and project-based quotations are also available. Simply send us your required quantity and compatible device models, and we'll prepare the most competitive proposal.

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LINK-PP LS-SM554G-40I SFP 4G/4.25G 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-SM554G-40I SFP 4G/4.25G 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 185468
Price: 87.72 USD
Availability: InStock
Rating: 4.9 (28 reviews)

# 185468

Product: LINK-PP LS-SM554G-40I SFP 4G/4.25G 1550nm 40km DOM Duplex LC SMF Optical Transceiver Module (Industrial)
SKU: 185468
P/N: LS-SM554G-40I
Price: $ 102
Stock: 890 in Stock
Sold: 410
Product URL: https://www.l-p.com/products/482091.htm

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LINK-PP LS-SM554G-40I 4.25G SFP Specifications

The LINK-PP LS-SM554G-40I is a high-performance 4.25G SFP transceiver developed for long-distance telecommunications over single-mode fiber, particularly in challenging industrial situations. Its key specifications are a data throughput of 4.25 Gbps, a transmission range of 40 km, an operational wavelength of 1550 nm, and a duplex LC fiber interface.

LINK-PP Part Number	LS-SM554G-40I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	4.25Gbps
Wavelength	1550nm	Max Cable Distance	40km
Connector	LC duplex	Media	SMF
Optical Components	DFB 1550nm	DOM Support	Yes
Receiver Sensitivity	< -17.5dBm	TX Power	-2 to +4dBm
Industrial Temperature Range	-40 to 85°C	Protocols	MSA Compliant

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Q: Can these 1550nm 40 km Fibre Channel SFP modules be used over standard OS2 single-mode fiber, and has anyone successfully deployed them in outdoor industrial cabinets operating close to -40°C while maintaining stable Fibre Channel performance? By H***r on 2026-06-28

A: Yes. This module is designed for transmission over standard single-mode fiber with a maximum reach of 40 km. The industrial version supports an operating temperature range of -40°C to +85°C, making it suitable for outdoor cabinets, factory automation, utility networks, and other harsh environments. When installed within the specified optical power budget and supported Fibre Channel standards, it delivers stable long-term performance. By admin on 2026-06-28
Q: Has anyone tested this module with Cisco MDS, Brocade, IBM, or other OEM Fibre Channel switches? Any compatibility issues during long-term production use? By M***z on 2026-05-30

A: Yes. The LS-SM554G-40I is manufactured in compliance with the MSA standard and supports OEM coding for a wide range of Fibre Channel platforms. It has been widely deployed with Cisco, Brocade, IBM, and other compatible storage networking equipment. If you have a specific switch model, feel free to contact us and we'll verify compatibility before shipment. By admin on 2026-05-30
Q: We're planning a storage upgrade requiring around 150 modules. Does LINK-PP offer better pricing for bulk purchases or support custom OEM labels for large projects? By J***n on 2025-08-05

A: Absolutely. We provide volume discounts for enterprise and system integrator projects. OEM labeling, customized EEPROM coding, private branding, and project-based quotations are also available. Simply send us your required quantity and compatible device models, and we'll prepare the most competitive proposal. By admin on 2025-08-05

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David Smith

Australia

Verified Purchase

4 .0

2026-06-12

One anti-static bag wasn't sealed perfectly, but the module itself was in excellent condition. Passed all diagnostics and has been running reliably ever since. (^.^)

45 Helpful vote Comments

Brian Morgan

Romania

Verified Purchase

5 .0

2026-04-29

Installed on our Brocade SAN switch and the 4G Fibre Channel link came online immediately. DOM values look accurate and stable after several weeks of operation. Very satisfied. ^^

98 Helpful vote Comments

Benjamin Campbell

Singapore

Verified Purchase

5 .0

2026-04-07

We mixed these compatible modules with original OEM optics during a storage migration project. Interoperability was seamless, and all links synchronized immediately at 4.25Gbps Fibre Channel. Excellent choice for reducing maintenance costs without sacrificing reliability.

91 Helpful vote Comments

Stephen Moore

Japan

Verified Purchase

5 .0

2026-04-04

Installed this module in our disaster recovery SAN over a 40 km SMF connection. The 1550nm DFB optics maintained stable optical power throughout stress testing, and the DOM information made link verification much easier. We've experienced zero CRC errors after months of continuous operation.

43 Helpful vote Comments

Grace Murphy

India

Verified Purchase

5 .0

2026-02-17

Great compatibility with our existing SAN environment. Detected instantly without firmware changes. (⌒▽⌒)

69 Helpful vote Comments

Jonathan Davis

Sweden

Verified Purchase

4 .0

2026-02-14

The shipping box had a small dent, but every transceiver inside was well protected. Installation was smooth and performance has been flawless ever since. :)

4 Helpful vote Comments

Hailey Smith

Russian Federation

Verified Purchase

5 .0

2025-12-15

The industrial operating temperature (-40°C to +85°C) was the main reason we chose this model. It's been running inside an outdoor telecom cabinet for months with no instability, even during hot afternoons and freezing nights.

36 Helpful vote Comments

Mia Ramirez

Belarus

Verified Purchase

5 .0

2025-12-14

Outstanding quality.

61 Helpful vote Comments

Lauren Jones

Thailand

Verified Purchase

5 .0

2025-11-04

Excellent Fibre Channel optic! (^_^)/

7 Helpful vote Comments

Leah Wilson

United Arab Emirates

Verified Purchase

5 .0

2025-10-15

Purchased a dozen units for a storage network expansion. Every module passed testing on the first attempt, and none of our Fibre Channel switches reported compatibility warnings. Great value for enterprise deployments. (^_^)b

42 Helpful vote Comments

Austin Green

Finland

Verified Purchase

5 .0

2025-09-30

Deployment couldn't have been easier. Every module was recognized instantly by our Fibre Channel switches, and the Duplex LC interface fit perfectly with our existing cabling. Great experience overall. (^o^)/

13 Helpful vote Comments

Alexander Edwards

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-09-01

We've installed more than twenty units across multiple data halls. Every transceiver reported accurate DDM/DOM values, and none of the switches logged compatibility alarms. For long-distance Fibre Channel storage links, these have exceeded our expectations. (ง •̀_•́)ง

64 Helpful vote Comments

Rachel Mitchell

Thailand

Verified Purchase

5 .0

2025-07-30

Works perfectly. :)

29 Helpful vote Comments

Christian Allen

Canada

Verified Purchase

5 .0

2025-07-09

Great price for an industrial 4G Fibre Channel SFP. Happy with the purchase. :]

88 Helpful vote Comments

Amelia Evans

Hungary

Verified Purchase

5 .0

2025-04-15

The -40°C to +85°C operating range made this an easy choice for our outdoor industrial cabinets. Even under extreme weather conditions, link stability has remained excellent and optical diagnostics continue to report healthy TX/RX levels.

31 Helpful vote Comments

Timothy Phillips

Russian Federation

Verified Purchase

5 .0

2025-01-31

Very impressed with the build quality. Clean LC connectors, stable Fibre Channel throughput, and excellent interoperability with our existing storage infrastructure. :)

24 Helpful vote Comments

Rachel Moore

Denmark

Verified Purchase

5 .0

2025-01-14

Using these on a 40 km single-mode fiber link between two manufacturing facilities. Link establishment was immediate, optical power levels stayed within specification, and the Duplex LC connectors fit perfectly. Couldn't ask for better reliability. (•̀ᴗ•́)و

66 Helpful vote Comments

Isabella Parker

Argentina

Verified Purchase

5 .0

2024-12-21

Exactly as described. :D

52 Helpful vote Comments

Scarlett Thompson

Indonesia

Verified Purchase

5 .0

2024-11-03

Reliable long-distance optic. Definitely buying again.

44 Helpful vote Comments

Gary Hill

Mexico

Verified Purchase

5 .0

2024-10-24

After comparing several 40 km 4G Fibre Channel SFP transceivers, this model offered the best balance of industrial temperature support, DOM monitoring, OEM compatibility, and price. We've now standardized on this module for new SAN expansion projects because it consistently delivers stable performance in both indoor data centers and harsh industrial environments. (≧▽≦)

28 Helpful vote Comments

Hailey Smith

Canada

Verified Purchase

5 .0

2024-10-09

Excellent OEM replacement. (•ᴗ•)

43 Helpful vote Comments

Mark Bell

United States

Verified Purchase

5 .0

2024-09-11

Everything worked right out of the box. No tuning required. (¬‿¬)

67 Helpful vote Comments

Scott Harris

Canada

Verified Purchase

5 .0

2024-08-15

Rock-solid performance.

89 Helpful vote Comments

Alexander Thompson

Argentina

Verified Purchase

4 .0

2024-07-11

Performance is excellent, although shipping took a little longer than expected. The modules themselves are high quality and work exactly as advertised. :P

24 Helpful vote Comments

Christian Walker

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-06-02

Works flawlessly with our IBM storage equipment. (•̀ᴗ•́)

80 Helpful vote Comments

Steven Gonzalez

Cambodia

Verified Purchase

5 .0

2024-04-10

Reliable OEM-compatible SFP. Highly recommended for long-distance Fibre Channel links. (＾▽＾)

65 Helpful vote Comments

Samantha Sanchez

Thailand

Verified Purchase

5 .0

2024-02-20

We've been using these 1550nm 40km SFP Fibre Channel transceivers to connect two storage rooms across our industrial campus. Signal quality is excellent, latency remains low, and the optical diagnostics have been very helpful during routine maintenance. Definitely a reliable OEM alternative.

36 Helpful vote Comments

Elizabeth Taylor

Indonesia

Verified Purchase

5 .0

2024-01-15

We compared several compatible 4G Fibre Channel SFP modules before placing a bulk order. These offered the best combination of compatibility, stable DOM monitoring, industrial temperature support, and overall cost. They've worked flawlessly with Brocade, Cisco, and IBM storage equipment so far. (☞ﾟヮﾟ)☞

77 Helpful vote Comments