10GBASE-BX20-U BiDi SFP+ 1270nm-TX/1330nm-RX 20km DOM Simplex LC/UPC SMF Optical Transceiver Module

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10GBASE-BX20-U BiDi SFP+ 20km

PN: CT-SFP+BX-20U

10G BIDI SFP+ 1270/1330NM 20KM Carritech CT-SFP+BX-20U and CT-SFP+BX-20D are 10Gbps bi-directional SFP+ transceivers designed for single-mode fiber links up to 20 km. Featuring DFB transmitters and PIN receivers, they deliver reliable 10G Ethernet connectivity over a single fiber strand with complementary transmit and receive wavelengths.
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 10Gbps Bi-Directional SFP+ Transceiver is a high-performance module designed for medium-distance optical communication over single-mode fiber (SMF) up to 20 kilometers. Supporting data rates of up to 11.1Gbps, it integrates a 1270nm DFB laser and a PIN receiver for upstream communication (CT-SFP+BX-20U) and a 1330nm DFB laser and PIN receiver for downstream communication (CT-SFP+BX-20D). This transceiver is built in a hot-pluggable SFP+ form factor with an LC connector, making it ideal for applications such as 10GBASE-BX Ethernet. It complies with SFF-8472 and SFF-8431 standards, as well as IEEE 802.3ae, ensuring compatibility with modern network systems.

The module operates on a single +3.3V power supply with a power consumption of less than 1.5W, making it energy-efficient for industrial and commercial applications. Designed to function in challenging environments, it supports an extended case operating temperature range from -40°C to +85°C. RoHS compliance ensures that the product meets environmental standards.

The optical performance of the transceiver is robust. The transmitter provides an average output power ranging from -5.4dBm to -1dBm, with an extinction ratio of 3.5dB for clear signal differentiation. The receiver features a sensitivity of -15dBm and can handle wavelengths from 1260nm to 1280nm for the upstream module and 1320nm to 1340nm for the downstream module. Additional features, such as Loss of Signal (LOS) detection, enhance diagnostic capabilities, allowing real-time monitoring of link conditions.

Electrically, the transceiver includes a differential input impedance of 100Ω and supports input and output swing differentials to ensure compatibility with host systems. The module also integrates advanced digital diagnostics monitoring, accessible via a 2-wire serial interface, to provide real-time feedback on operating parameters such as temperature, voltage, bias current, and optical power. Alarm and warning thresholds notify users of deviations from optimal conditions.

In summary, the 10Gbps Bi-Directional SFP+ Transceiver is a versatile and reliable solution for high-speed networking over medium distances. Its compliance with industry standards, robust diagnostic features, and efficient design make it a critical component for modern telecommunications and data center infrastructures.

These hot-pluggable SFP+ modules support data rates up to 11.1 Gbps and comply with IEEE 802.3ae 10GBASE-LR/LW, SFF-8431, and SFF-8472 standards. They use a simplex LC connector for bi-directional transmission: CT-SFP+BX-20U transmits at 1270 nm and receives at 1330 nm, while CT-SFP+BX-20D transmits at 1330 nm and receives at 1270 nm. Designed for 20 km reach, they include digital diagnostics monitoring (DDMI) for real-time parameter tracking. Power dissipation is <1.5 W, with industrial-grade operating temperature from −40 °C to +85 °C.

Key Parameters

Specification CT-SFP+BX-20U CT-SFP+BX-20D Notes
Form factor / connector SFP+ (hot-pluggable), LC simplex SFP+ (hot-pluggable), LC simplex Single-fiber bidirectional
Data rate Up to 11.1 Gbps Up to 11.1 Gbps 10.3125 Gbps nominal
Reach Up to 20 km SMF Up to 20 km SMF
Tx wavelength 1270 nm 1330 nm DFB laser
Rx wavelength 1330 nm 1270 nm PIN receiver
Tx optical power −5.4 to −1 dBm −5.4 to −1 dBm Average
Receiver sensitivity ≤ –15 dBm ≤ –15 dBm
Receiver overload 0.5 dBm max 0.5 dBm max
Extinction ratio ≥ 3.5 dB ≥ 3.5 dB
Supply voltage 3.14 – 3.47 V 3.14 – 3.47 V Single 3.3 V supply
Power consumption <1.5 W <1.5 W
Diagnostics Temperature, bias, Tx/Rx power, Vcc Temperature, bias, Tx/Rx power, Vcc Digital diagnostics (DDMI)
Operating case temp. −40 °C to +85 °C −40 °C to +85 °C Industrial grade
Compliance IEEE 802.3ae 10GBASE-LR/LW, SFF-8431, SFF-8472, RoHS, EN 60825 Class 1 Same Standards compliant

Applications

  • 10GBASE-BX Ethernet over SMF up to 20 km.
  • Industrial and harsh-environment network deployments.
  • Enterprise backbone and access aggregation.

Features

  • Bi-directional 10G SFP+ with single LC connector.
  • Supports up to 20 km over SMF.
  • DFB laser transmitter and PIN receiver design.
  • Industrial-grade operation (−40 °C to +85 °C).
  • Low power consumption (<1.5 W).
  • Hot-pluggable SFP+ MSA-compliant footprint.
  • Integrated DDMI for real-time monitoring.
  • Fully compliant with IEEE 802.3ae, SFF-8431, SFF-8472, RoHS, EN 60825 Class 1.

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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10GBASE-BX20-U BiDi SFP+ 20km

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