400G QSFP-DD SR4 PAM4 850nm 100m DOM MPO-12/APC MMF Optical Transceiver Module

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400G QSFPDD SR4 2

PN: CT-400G-QDD-SR4

400G QSFP-DD SR4 850NM 100M The 400GBASE-SR4 optical transceiver features an MTP/MPO-12 connector and supports transmission distances of up to 100 meters over parallel OM4 multi-mode fiber. It complies with the IEEE 802.3bs protocol and the 400GAUI-8 standard. This module transmits a 400 Gigabit Ethernet signal across four parallel lanes, utilizing a single wavelength per lane. It also offers support for 2 × 200G-SR and 4 × 100G-SR configurations, making it a versatile solution for high-speed networking.
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 400Gbps QSFP-DD SR4, also known as 400GBASE SR4 QDD Optical Transceiver, is a high-speed, short-range optical module designed for high-performance data communication over multimode fiber (MMF). Engineered for hyperscale data centers, cloud computing environments, and enterprise networks, this transceiver ensures efficient and reliable high-speed connectivity for demanding applications.

Equipped with eight full-duplex data lanes, each operating at 25.78125Gbps, this transceiver achieves an aggregate bandwidth of 200Gbps, making it a powerful solution for high-bandwidth applications. It utilizes OM3 fiber to support transmission distances up to 70 meters and OM4 fiber to extend reach up to 100 meters, providing flexible deployment options for modern data center architectures.

Using an 850nm VCSEL (Vertical Cavity Surface Emitting Laser) array for transmission and a PIN photodetector array for reception, the 400G QSFP-DD SR4 module delivers low-latency and energy-efficient performance while supporting 2x100GBASE-SR4 Ethernet standards. With a maximum power consumption of under 4W, this module ensures efficient power usage, reducing operational costs and heat output in high-density networking environments.

Housed in a hot-pluggable QSFP-DD form factor, this transceiver is designed for easy integration and quick deployment into existing network infrastructures. The inclusion of an MPO-24 optical connector allows for high-density fiber connectivity, making it ideal for scalable network growth.

The 400G QSFP-DD SR4 transceiver supports advanced internal Clock and Data Recovery (CDR) circuits on both the transmitter and receiver channels, with CDR bypass capability for flexible and low-latency networking. This feature enhances signal integrity and performance stability, ensuring smooth data flow in mission-critical applications.

With a wide case operating temperature range of 0°C to 70°C, the transceiver is built to withstand varied operating conditions in data centers, cloud environments, and high-speed network infrastructures. Additionally, it is fully compliant with RoHS standards, demonstrating adherence to environmental and safety regulations, making it a sustainable and future-proof solution for next-generation networking.

Applications

  • 400G Ethernet
  • Datacenter switch

Features

  • 53.125 GBd PAM4 ×4 channel 400G-SR4 Optical interface
  • 26.5625 GBd PAM4 ×8 channel 400G AUI-8 C2M Electrical interface
  • Up to 100m transmission distance on OM4/OM5 MMF
  • 850nm VCSEL and PIN receiver
  • QSFP-DD MSA package with MPO-12 APC
  • Very low EMI and excellent ESD protection
  • +3.3V power supply
  • Power consumption less than 8W
  • Operating case temperature: 0~70°C
  • IIC rate up to 1MHz

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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400G QSFPDD SR4 2

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