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CT-Q40/100-SRBD QSFP28 BiDi 850/880/910/940nm 100m DOM Duplex LC/UPC MMF Optical Transceiver Module

CT-Q40/100-SRBD QSFP28 BiDi 850/880/910/940nm 100m DOM Duplex LC/UPC MMF Optical Transceiver Module
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CT-Q40/100-SRBD QSFP28 BiDi 100m

PN: CT-Q40/100-SRBD

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  • Lifetime Warranty
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  • OEM Compatible
40/100G QSFP28 SRBD 100M High-performance QSFP28 bi-directional transceiver for 40G/100G Ethernet over multimode fiber (MMF), supporting dual-wavelength 850/900 nm PAM4 transmission with up to 100 m reach on OM4 fiber. Optimized for short-range data center interconnects with LC duplex interface and low power consumption.
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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 40/100G QSFP28 SRBD Optical Transceiver is a high-performance, multi-rate module designed for short-range communication over multimode fiber (MMF). This transceiver supports both 40G and 100G Ethernet standards, utilizing a dual-wavelength VCSEL bi-directional optical interface operating at 850nm and 900nm. It offers an aggregate bandwidth exceeding 100Gbps and is compatible with QSFP28 MSA and IEEE 802.3bm standards. Designed to operate over OM3 MMF up to 70 meters and OM4 MMF up to 100 meters, the transceiver is ideal for data center interconnects, switch and router connections, and backplane applications.

The module operates on a single +3.3V power supply with power consumption below 3.5W and functions reliably within a temperature range of 0°C to 70°C. With a duplex LC optical interface, it allows the reuse of existing cabling infrastructure. The transceiver employs PAM4 modulation for two 50Gbps electrical channels, transmitting and receiving data optically over a single LC duplex fiber. Its advanced design enables compatibility with proprietary protocols, making it a versatile choice for high-speed networking environments. Additionally, it complies with RoHS standards, underscoring its environmentally friendly construction.

The CT-Q40100-SRBD is a pluggable QSFP28 SR transceiver designed for duplex short-range 40G and 100G Ethernet links. It multiplexes four 25.78125 Gb/s electrical lanes into two 50 Gb/s PAM4 optical channels, using bi-directional VCSEL technology at 850 nm and 900 nm wavelengths. Transmission distances reach up to 70 m on OM3 MMF and 100 m on OM4 MMF. The module supports a single +3.3 V power supply with power dissipation under 3.5 W, and operates in a 0 °C to 70 °C case temperature range. It uses a duplex LC connector for optical connections and a 38-contact QSFP28 edge connector for electrical interface.

Key specifications

  • Form factor / standard: QSFP28, MSA compliant, IEEE 802.3bm 100G XLPPI electrical interface.
  • Aggregate bandwidth: 100 Gb/s.
  • Reach: 70 m (OM3) / 100 m (OM4).
  • Optical interface: Dual-wavelength VCSEL, PAM4 modulation, 850 nm (CH1) and 900 nm (CH2).
  • Connector: LC duplex.
  • Power consumption: 2.5–3.5 W max; supply current 0.75–1.0 A.
  • Supply voltage: 3.13–3.47 V.
  • Operating case temp: 0 °C to +70 °C.
  • Compliance: RoHS.

Optical characteristics (per channel)

Parameter Value
Wavelengths 850 nm (CH1), 900 nm (CH2)
Average TX power −6 to +4 dBm
Extinction ratio ≥ 3 dB
Receiver sensitivity ≤ −8 dBm
Max input power +0.5 dBm
LOS assert / de-assert −30 to −10 dBm
Receiver reflectance ≤ −15 dB

Applications

  • 100G Ethernet interconnects within and between racks in data centers.
  • Switch and router connections in datacom and telecom networks.
  • Data aggregation and backplane links requiring high-density, short-reach optics.
  • Proprietary high-bandwidth applications leveraging LC duplex cabling.

Features

  • Bi-directional dual-wavelength VCSEL technology (850/900 nm PAM4).
  • Supports both 40G and 100G Ethernet over MMF.
  • Duplex LC connector, enabling reuse of existing cabling.
  • Compact QSFP28 form factor with hot-pluggable design.
  • Low power operation (< 3.5 W) for efficient deployment.
  • Compliant with IEEE 802.3bm, SFF-8636, QSFP28 MSA.
  • No digital diagnostic monitoring (DDM/DOM).

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.

How Carritech Optics tests transceivers

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.

Enquire about the Opticode Transceiver Coding Box
  • Easy to use
  • Seamless Compatibility
  • Full Network Control
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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CT-Q40/100-SRBD QSFP28 BiDi 100m

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