400G QSFP DD FR4 PAM4 1310nm 2km DOM Duplex LC/UPC SMF Optical Transceiver Module

The 400G QSFP DD FR4 is a high-performance QSFP-DD transceiver designed for 400GBASE-FR4 applications, supporting data rates up to 400Gbps. It features an 8×53.125Gbps electrical interface (400GAUI-8) using PAM4 modulation and can transmit over single-mode fiber (SMF) for distances up to 2km. The module incorporates a CWDM4 (1271/1291/1311/1331nm) EML laser and PIN receiver, housed in a QSFP-DD MSA package with a duplex LC connector. It operates at a case temperature range of 0°C to 70°C, with a power consumption of 12W. The transceiver complies with IEEE 802.3cu, QSFP-DD MSA hardware standards, and EU Directive 2015/863/EU for RoHS compliance.

Ideal for 400G Ethernet and data center or cloud applications, the CT-400G-QDD-FR4 provides integrated digital diagnostic monitoring (DDM) via an I2C interface. It ensures reliable optical performance, including a wavelength range of 1264.5nm to 1337.5nm across four lanes, high extinction ratios, and low optical modulation amplitude (OMA) dispersion. Designed for robustness and scalability, it meets demanding operational and environmental conditions, making it a critical component for high-speed, high-capacity optical networks.

All of our optical transceivers come with a lifetime warranty.

The CT-400G-QDD-FR4 is a hot-pluggable QSFP-DD optical module designed for 400GBASE-FR4 Ethernet applications in data centers and cloud networks. It delivers 400 Gb/s using 8×53.125 Gb/s PAM4 electrical lanes (400GAUI-8), multiplexed into 4 CWDM optical channels (1271–1331 nm). It supports up to 2 km over G.652 SMF, consumes ~12 W, and integrates digital diagnostics monitoring (DDM) accessible via I²C.

Key specifications

• Form factor / standards: QSFP-DD MSA; IEEE 802.3cu 400GBASE-FR4; CMIS compliant.
• Data rate: 400 Gb/s (8×53.125 Gb/s PAM4 electrical lanes).
• Reach: Up to 2 km on G.652 SMF.
• Optical wavelengths (CWDM4 grid): 1271, 1291, 1311, 1331 nm.
• Connector: Duplex LC.
• Power consumption: ~12 W (max 3.45 A @ 3.3 V).
• Supply voltage: 3.13–3.47 V.
• Operating case temp: 0 °C to 70 °C.
• Diagnostics: I²C interface with DDM (temperature, voltage, bias, TX/RX power).
• Compliance: IEEE 802.3cu, QSFP-DD MSA, RoHS (EU 2015/863/EU).

Optical characteristics (per lane unless noted)

• 400GBASE-FR4 Ethernet for data center and cloud interconnects.
• High-capacity 400G networking requiring 2 km single-mode reach.
• Scalable cloud infrastructure with QSFP-DD optical interfaces.

• Hot-pluggable QSFP-DD form factor with duplex LC.
• CWDM4 EML transmitters (1271–1331 nm) with PIN receivers.
• Up to 2 km reach on standard SMF.
• Power-efficient design (~12 W) for 400G optics.
• Integrated digital diagnostics (DDM).
• Fully compliant with IEEE 802.3cu and QSFP-DD MSA.

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers, including the CT-400G-QDD-FR4, 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.

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.