Specifications
400G QSFP-DD DR4 Transceivers for High-Performance Networks
Reliable, compatible, and deployment-ready 400G optical transceivers designed for high-performance data centers, cloud networks, telecom environments, and AI-driven infrastructure. The EN-QDD-DR4 delivers 400G Ethernet connectivity over parallel single-mode fiber, supporting both direct 400G-to-400G links and 400G breakout to 4 × 100G DR applications for high-density network deployments.
Key Features
- QSFP-DD MSA compliant
- Parallel 4 Optical Lanes
- IEEE802.3bs Specification compliant
- Up to 500m transmission on single mode fiber (SMF) with FEC
- Operating case temperature: 0 to 70°C
- 8x53.125Gb/s electrical interface (400GAUI-8)
- Data Rate 106.25Gbps (PAM4) per channel.
- Maximum power consumption 12W
- MPO-12 connector
- RoHS compliant
400G QSFP-DD DR4 Optical Transceiver
The EN-QDD-DR4 is a 400G QSFP-DD DR4 optical transceiver designed for up to 500 m optical communication over parallel single-mode fiber. The module converts 8 channels of 50G PAM4 electrical input data into 4 channels of parallel optical signals, each operating at 100Gb/s, for an aggregate data rate of 400Gb/s. On the receive side, it converts four 100Gb/s optical lanes back into eight 50G PAM4 electrical output lanes.
| Parameter | Specification | Parameter | Specification |
|---|
| Form Factor | QSFP-DD / QSFP56-DD | Data Rate | 400Gbps aggregate; 8 × 53.125Gb/s PAM4 electrical interface to 4 × 106.25Gb/s PAM4 optical lanes |
| Standard Compliance | IEEE 802.3bs 400GBASE-DR4; QSFP-DD MSA; 400GAUI-8 / CEI-56G-VSR-PAM4 | Modulation | PAM4 |
| Wavelength | 1310 nm nominal; 1304.5–1317.5 nm range | Connector | MTP/MPO-12 APC |
| Fiber Type | Single-mode fiber, SMF / OS2 / G.652, parallel | Max Reach | 500 m over SMF with host FEC |
| Transmit Power | Average launch power: -2.9 to +4.0 dBm per lane; OMAouter: -0.8 to +4.2 dBm per lane | Receiver Sensitivity | OMAouter sensitivity: -4.4 dBm max per lane; average Rx power: -5.9 to +4.0 dBm per lane |
| Optical Budget | 3 dB max supported insertion loss | Lane Configuration | 4 Tx / 4 Rx optical lanes; 8 host electrical lanes |
| Host Interface | QSFP-DD MSA 76-pin host interface; 400GAUI-8 electrical interface | FEC Requirement | Host FEC required / performed by host platform |
| Power Supply | 3.3 V nominal; 3.135–3.465 V operating range | Power Consumption | ≤12 W max; public vendor variants commonly list ~9–12 W |
| Digital Diagnostics | DOM/DDM supported; CMIS / 2-wire management interface | Operating Temperature | 0°C to 70°C (Commercial) |
| Storage Temperature | -40°C to 85°C | Cable Type | Parallel SMF MTP/MPO-12 APC cable; 8 fibers used, 4 Tx + 4 Rx; MTP/MPO-to-4×LC breakout cable for 4×100G DR1 applications |
Connectivity examples
Switch-to-switch (leaf-spine)
This figure shows a direct connectivity between two switches using 100GBASE-SR4 QSFP28 transceivers connected by 1x multi-mode MTP to MTP patch cable.
Switch-to-server
This figure shows a direct connectivity between two switches using 100GBASE-SR4 QSFP28 transceivers connected by 1x multi-mode MTP to MTP patch cable.
Switch-to-server (via breakout)
Selection Guide
Which 100G Transceiver Should I Choose? Selecting the right 100G transceiver depends on distance, fiber type, and infrastructure. Use the guide below to quickly identify the best option for your deployment.
| Selection Criteria | Option | Recommended Transceivers | Fiber / Connector | Typical Use Case |
|---|---|---|---|---|
| Distance (Reach) | ≤ 100m | SR4, SR BiDi | MMF (MPO / LC) | Intra-rack, leaf-spine |
| ≤ 500m | DR, PSM4 | SMF (LC / MPO) | Data center interconnect | |
| ≤ 2km | FR, CWDM4 | SMF (LC) | DCI / aggregation | |
| 10km – 40km | LR4, ER4 | SMF (LC) | Campus / metro | |
| ≥ 80km | ZR4 | SMF (LC) | Long-haul / DCI | |
| Fiber Type | Multimode (OM3/OM4/OM5) | SR4, SR BiDi | MPO / LC | Short-range DC |
| Single-mode (OS2) | DR, FR, CWDM4, LR4, ER4, ZR4 | LC | Medium to long reach | |
| Parallel SMF | PSM4, PLR4 | MPO | Hyperscale / legacy MPO | |
| Connector Type | MPO / MTP | SR4, PSM4, PLR4 | Multi-fiber | High-density links |
| Duplex LC | CWDM4, LR4, DR, FR, ER4, ZR4 | 2 fibers | Standard deployments | |
| LC (BiDi MMF) | SR BiDi | 2 fibers | Fiber reuse / migration | |
| Optical Technology | NRZ (4×25G) | SR4, PSM4, LR4, CWDM4 | MPO / LC | Mature, widely deployed |
| PAM4 (Single Lambda) | DR, FR, LR (new gen) | LC | AI / cloud / future-ready | |
| Breakout Capability | 100G → 4×25G | SR4, PSM4, DAC, AOC | MPO / breakout cable | Server fan-out |
| Power & Thermal | 2.5W – 3.5W | SR4 | — | High-density DC |
| 3.5W – 4.5W | CWDM4, LR4 | — | Standard SMF | |
| 4.5W – 6W | ER4, ZR4 | — | Long distance |
Applications
Deployment scenarios for this module
Data Center & Enterprise Networks
High-speed connectivity for leaf-spine architectures, server aggregation, and backbone upgrades supporting growing east-west traffic.
Telecom & Service Provider Transport
Robust optical connectivity for aggregation, metro, and long-haul transport across carrier and service provider networks.
Cloud, AI & Hyperscale Infrastructure
Reliable, low-latency links designed for high-performance computing, AI workloads, and scalable cloud environments.
Quality Certification
At E.C.I. NETWORKS, all our optical transceivers are CE, FCC, RoHS, and FDA laser compliant, meeting global standards for safety, environmental responsibility, and electromagnetic performance.
Key Certifications
Emissions & immunity compliance for IT and multimedia equipment.
Verified as unintentional radiators with SDoC available.
Safety-certified and laser-classified (Class 1).
U.S. laser safety regulations.
Free from hazardous substances and environmentally responsible.
Available on selected models per regional or customer needs.
Compliance Standards
These certifications ensure our transceivers are safe, interoperable, and built to meet the highest global compliance standards across data center, telecom, and enterprise environments.
Conflict-Free Sourcing
We comply with the SEC Conflict Minerals Rule, supporting ethical sourcing practices for minerals like tantalum, tin, tungsten, and gold.
Quality Certification
At E.C.I. NETWORKS, all our optical transceivers are CE, FCC, RoHS, and FDA laser compliant, meeting global standards for safety, environmental responsibility, and electromagnetic performance.
Key Certifications
Emissions & immunity compliance for IT and multimedia equipment.
Verified as unintentional radiators with SDoC available.
Safety-certified and laser-classified (Class 1).
U.S. laser safety regulations.
Free from hazardous substances and environmentally responsible.
Available on selected models per regional or customer needs.
Compliance Standards
These certifications ensure our transceivers are safe, interoperable, and built to meet the highest global compliance standards across data center, telecom, and enterprise environments.
Conflict-Free Sourcing
We comply with the SEC Conflict Minerals Rule, supporting ethical sourcing practices for minerals like tantalum, tin, tungsten, and gold.
Performance & Reliability
We ensure our optical transceivers deliver exceptional performance and long-term reliability through rigorous testing on industry-leading equipment.
Power & Wavelength Testing
We verify signal strength and wavelength stability to ensure seamless decoding and consistent transmission across the optical path.
Traffic Testing
All transceivers undergo bit error rate (BER) and packet loss testing to guarantee zero data loss and full compliance with Ethernet and Fibre Channel standards.
Optical Performance Validation
Our modules are evaluated for signal integrity, eye diagram clarity, and BER, ensuring stable, high-quality optical transmission in all operating conditions.
End Face Inspection
Each module's fiber interface is inspected and cleaned to eliminate contamination and physical defects -- a critical step for optimal signal performance and long service life.
Warranty & Compatibility
Optical Transceivers (1G–400G): Lifetime (5 Years)
Zero Risk
Using our transceivers does not void the warranty of your network equipment. Global OEM policies and consumer protection laws (like the Magnuson-Moss Warranty Act) prevent manufacturers from denying support based solely on the use of third-party components.
Guaranteed Compatibility
Our modules are coded and tested for seamless operation across major platforms including Cisco, Arista, Juniper, HPE, Nvidia, Huawei, and more. This rigorous validation ensures plug-and-play reliability and full compliance with OEM specifications.
Technical Support & RMA
Have an issue? We provide full technical support and hassle-free RMA on all eligible transceivers. Our team is ready to help with any technical questions about compatibility or deployment. contact our technical support support@ecin.ca
Q&A
Commonly asked questions
No. Under the Magnuson-Moss Warranty Act and similar global consumer protection laws, OEMs cannot void your equipment warranty simply because you use a third-party transceiver. Your equipment warranty remains intact.
Yes. Our QSFP28 modules can be coded for major OEM platforms (Cisco, Juniper, Arista, Nvidia, etc.) and support open networking environments including SONiC.
A compatible generic version can be provided and coded before delivery.
Common types include SR4 (MMF, short reach), PSM4 (parallel SMF), CWDM4 (SMF up to ~2km), LR4 (SMF up to ~10km), and extended reach options like ER4. Each is designed for different distances and fiber types.
Choose based on distance and fiber: SR4 for short-range multimode (data center), CWDM4 for cost-effective singlemode up to ~2km, and LR4 for longer distances up to ~10km.
Yes. Our modules are coded for the specific platform you select at purchase. They are recognized natively by the switch OS without any additional configuration or commands.
No. Our transceivers meet the same IEEE and MSA specifications as OEM modules. They deliver identical optical performance, data rates, and reach characteristics.
Yes. We offer full support, RMA service, and warranty coverage on all modules.
Resources
Downloads and documentation