400G QSFP-DD VR4 Optical Transceiver – 50m Reach, PAM4, CMIS 5.0

1. Product Overview

The 400G QSFP-DD VR4 Optical Transceiver (CC-QSFD04VR4-12D) is a high-performance, hot-pluggable optical module designed for next-generation data center and high-performance computing networks. It supports 400G Ethernet over multimode fiber with a reach of up to 50m on OM4 fiber. The transceiver utilizes PAM4 modulation and complies with the latest QSFP-DD MSA and CMIS 5.0 standards, ensuring broad compatibility and future-proofing.

2. Key Characteristics

• Data rate: 425 Gbps (4x 106.25 Gbps)
• Reach: Up to 50m on OM4 MMF
• Wavelength: 850nm VCSEL laser and PIN receiver
• Single MPO-12 connector
• Low power consumption: ≤7W (typical)
• Hot-pluggable QSFP-DD form factor
• Operating temperature: 0°C to +70°C
• RoHS 6/6 compliant

3. Technology & Standards

The transceiver is built on PAM4 modulation technology and supports 400GAUI-8 electrical interface. It is fully compliant with:

• IEEE 802.3db & IEEE 802.3bs
• QSFP-DD MSA Hardware Rev 5.0
• CMIS 5.0 Management Interface
• IEC/EN 60825-1 Laser Safety Class 1

4. Working Principle

The module converts 8x 53.125 GBaud electrical signals into four optical lanes using VCSEL arrays and PAM4 encoding. The optical signals are transmitted via an MPO-12 connector over OM4 multimode fiber. On the receiver side, a PIN photodiode array converts the optical signals back into electrical data with integrated clock and data recovery (CDR).

5. Applications

• Data center spine-leaf networks
• High-performance computing (HPC) clusters
• Cloud infrastructure interconnects
• Enterprise core and aggregation switching
• AI and machine learning fabric networks

6. Specifications

7. Advantages & Selling Points

• Lower power consumption vs. competitive network card solutions
• Enhanced diagnostics with CMIS 5.0 management interface
• Robust design supporting industrial temperature ranges
• Backward compatible with QSFP28 ports using adapter cables
• High-density form factor ideal for scalable data center deployments

8. Service & Support

All transceivers come with a 5-year warranty. We offer global shipping, 24/7 technical support, and custom labeling and packaging. OEM and ODM services are available for bulk orders.

9. FAQ

Q: Is this transceiver compatible with QSFP28 ports?
A: Yes, with an MPO-to-MPO breakout cable, it can be used in QSFP28 ports supporting 100G SR4.

Q: What is the maximum power consumption?
A: The module consumes ≤7W under normal operation.

Q: Does it support digital diagnostics monitoring (DDM)?
A: Yes, via the CMIS 5.0 interface.

10. Precautions

• Use only with OM3/OM4 multimode fiber.
• Avoid bending fiber beyond minimum bend radius.
• Ensure clean optical connectors to prevent signal loss.
• Do not exceed maximum operating temperature.
• Follow ESD precautions during handling and installation.

11. Company Introduction

China Cloud Electro Optics Technology Co., Ltd. has over 10 years of experience in the networking hardware industry. We operate a large factory with a strong technical team and supply products from leading brands including Mellanox, Ruckus, Aruba, and Extreme. Our inventory includes network switches, network cards, wireless access points, controllers, and cables. We are committed to providing competitive pricing, reliable quality, and full technical support.