1000BASE-SX SFP 850nm 550m DOM Duplex LC/UPC MMF Optical Transceiver Module

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1000Base SX 550M SFP

PN: CT-MSFP-SX-1

155M SFP MM 850NM 550M The 1000BASE-SX SFP compatible SFP transceiver is designed for reliable fiber optic networking, supporting link distances of up to 550m over multi-mode fiber (MMF) at a wavelength of 1310nm through an LC connector. Each module is individually tested for compatibility with a range of Cisco switches, routers, servers, and network interface cards (NICs). With low power consumption and hot-swappable functionality, this 100BASE SFP transceiver is an excellent choice for Internet Service Provider (ISP) Fast Ethernet connections, Enterprise LAN & SAN networks, Data Center LAN & SAN environments, and other optical communication applications.
Craig ***** - Cardiff, United Kingdom
26/09/2025
A pleasure to work with and a reliable supplier!
John ***** - Egham, United Kingdom
12/09/2025
Always enjoy working with Carritech. They makes things easy.
Marcin ***** - Malsch, Germany
15/05/2025
Reliable supplier, always a pleasure to work with
Liliana ***** - Madrid, Spain
14/05/2025
Fast and friendly service, personalized support throughout
Marcus ***** - Bristol, United Kingdom
13/05/2025
A pleasure to deal with. Always rely on Carritech.
Jagielski ***** - Poznan, Poland
09/05/2025
Always good to do business with
Peter ***** - Eindhoven, Netherlands
07/05/2025
Always attentive and professional, TOP!
Grégory ***** - Mauguio, France
06/05/2025
Commercial efficace, société fiable
Zach ***** - Lakeland, Florida
01/05/2025
Great company to work with. Very flexible and reliable supplier.
Chloe ***** - Berkshire, United Kingdom
24/02/2025
Always a pleasure working with Christian Quality packaging!
Marcus ***** - Bristol, United Kingdom
03/03/2025
Fastest shipments I've seen in years. Credit to the industry.
Alfred ***** - Vienna, Austria
06/08/2018
Always a pleasure to work with whole Carritech Team!

Fast Worldwide Delivery

We ship to over 100 countries, ensuring your parts reach you quickly and reliably wherever your business operates.

Extensive Global Inventory

Thousands of optical transceivers in stock and ready to ship, helping you keep your networks running without delay.

Fully Customisable Labelling

Customise labels tailored to your business with flexible designs, branding, and specific information.

Product Specifications

The 1000BASE-SX SFP 850nm 155Mbps SFP Optical Transceiver is an advanced module designed for short-range optical data transmission. This model enables communication over multimode fiber (MMF) up to a distance of 550 meters, making it ideal for Ethernet, telecommunications, and Fiber Channel applications. It utilizes an 850nm VCSEL laser and a PIN photodetector to deliver reliable performance. Housed in an SFP package with an LC connector, it ensures seamless integration into various networking environments. The module operates on a single +3.3V power supply and features LVPECL-compatible data input/output interfaces. It also complies with IEC-60825 laser safety standards and RoHS regulations, ensuring adherence to safety and environmental guidelines.

This transceiver is engineered to operate in diverse conditions, supporting supply voltages ranging from 3.15V to 3.45V. It functions effectively in commercial temperature ranges of 0°C to +70°C and can endure more demanding industrial conditions, with a range of -40°C to +85°C. Its power dissipation remains under 1W, offering energy efficiency alongside a steady data rate of 155Mbps. Additionally, its robust design includes low electromagnetic interference (EMI) and exceptional electrostatic discharge (ESD) protection, ensuring reliable operation in sensitive environments.

The optical characteristics of this transceiver are finely tuned for precision and efficiency. The transmitter operates at a center wavelength of 850nm with an output power range between -8dBm and -3dBm, ensuring clear and consistent signal transmission. Its extinction ratio falls between 12dB and 18dB, optimizing signal clarity. The receiver section accommodates wavelengths from 770nm to 860nm, achieving sensitivity as low as -19dBm. Its overload threshold is -3dBm, making it capable of handling diverse signal conditions while adhering to IEEE 802.3u and ANSI Fiber Channel standards for optical eye diagrams.

Electrical performance is another highlight of this transceiver, featuring a differential impedance of 100Ω for both transmitter and receiver sections. Its input and output swing differentials are adaptable to various configurations, enhancing compatibility with host systems. Defined voltage thresholds for TX Disable and Rx_LOS functionalities allow for precise operational control and monitoring, making this module a versatile choice for networking setups.

The 1000BASE-SX SFP 850nm 155Mbps SFP Optical Transceiver is a compact, efficient, and dependable solution for high-speed optical communication. With its excellent performance specifications, adherence to industry standards, and robust environmental tolerances, it is a key component for modern network infrastructures.

All of our optical transceivers come with a lifetime warranty.

Applications

  • Ethernet
  • Telecom
  • Fiber Channel

Features

  • SFP package with LC connector
  • 850nm VCSEL Laser and PIN photo detector
  • Up to 550m transmission on 50/125 um MMF
  • +3.3V single power supply
  • LVPECL compatible data input/output interface
  • Low EMI and excellent ESD protection
  • laser safety standard IEC-60825 compliant
  • Compatible with RoHS

Delivery

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.

We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.

Warranty

At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.

What Does Our Lifetime Warranty Cover?

Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:

  • Defects in Materials and Workmanship: If your product experiences any issues related to manufacturing or materials, we’ll repair or replace it free of charge.
  • Performance Assurance: Our optical transceivers are rigorously tested to meet industry standards, and we guarantee they’ll perform as expected in your network environment.
Easy Claims Process

Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.

Your Network’s Performance, Guaranteed

Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.

Datasheet Download

Performance Testing

At Carritech Optics, every product we supply undergoes a meticulous testing process designed to guarantee exceptional quality, reliability, and consistency. Our manufacturer operates within a professional laboratory environment, where advanced testing equipment and industry-standard procedures are used to carefully evaluate each item.

Reprogram your transceivers with speed, simplicity, and confidence.

Carritech’s Opticode is an advanced transceiver programming solution that gives you complete flexibility across your optical network. Designed to ensure seamless compatibility with a wide range of OEM systems, Opticode allows you to quickly reconfigure transceivers to meet your specific requirements. The result is greater control, reduced costs, and a more adaptable, future-proof infrastructure.

Craig ***** - Cardiff, United Kingdom
26/09/2025
A pleasure to work with and a reliable supplier!
John ***** - Egham, United Kingdom
12/09/2025
Always enjoy working with Carritech. They makes things easy.
Marcin ***** - Malsch, Germany
15/05/2025
Reliable supplier, always a pleasure to work with
Liliana ***** - Madrid, Spain
14/05/2025
Fast and friendly service, personalized support throughout
Marcus ***** - Bristol, United Kingdom
13/05/2025
A pleasure to deal with. Always rely on Carritech.
Jagielski ***** - Poznan, Poland
09/05/2025
Always good to do business with
Peter ***** - Eindhoven, Netherlands
07/05/2025
Always attentive and professional, TOP!
Grégory ***** - Mauguio, France
06/05/2025
Commercial efficace, société fiable
Zach ***** - Lakeland, Florida
01/05/2025
Great company to work with. Very flexible and reliable supplier.
Chloe ***** - Berkshire, United Kingdom
24/02/2025
Always a pleasure working with Christian Quality packaging!
Marcus ***** - Bristol, United Kingdom
03/03/2025
Fastest shipments I've seen in years. Credit to the industry.
Alfred ***** - Vienna, Austria
06/08/2018
Always a pleasure to work with whole Carritech Team!

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1000Base SX 550M SFP

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