400G QSFP-DD DR4
400GBASE-DR4 QSFP-DD PAM4 Silicon Photonics Transceiver Module What is 400G-DR4 This product is a 400Gb/s QSFP-DD optical module designed for 0.5Km optical communication applications. The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of parallel optical signals,...
- Product Introduction
400G QSFP-DD DR4 Optical Transceiver
High-performance 400GBASE-DR4 module with Silicon Photonics technology. Supports 500m SMF transmission and 4×100G breakout capability. Ideal for hyperscale data centers and AI/GPU cluster interconnects.
- 425G Maximum Speed
- 500M Maximum Distance
- <10W Typical Power Consumption
Product Highlights
Industry-leading technology for high-speed data center connectivity
High-Performance DSP Chip
Built-in Broadcom 7nm DSP with typical power consumption under 10W, significantly reducing data center energy costs.
Silicon Photonics Technology
Advanced 300mm wafer CMOS process with >85% yield rate. Higher integration density and lower manufacturing costs.
4×100G Breakout Support
Flexible breakout to 4×100G-DR interfaces or 2×200G-DR2 for gradual network upgrades and investment protection.
500m SMF Transmission
Meets intra-data center interconnect requirements. Perfect for Spine-Leaf architecture high-speed connections.
Full Standards Compliance
Compliant with IEEE 802.3bs, QSFP-DD MSA CMIS Rev4.1, OIF CEI-56G-VSR-PAM4, and 100G Lambda MSA.
Multi-Brand Compatibility
Tested and verified compatible with Cisco, Arista, Juniper, Dell, Huawei, HPE, NVIDIA/Mellanox equipment.
Key Specifications
Max Data Rate
(4×106.25Gb/s PAM4)
Transmission
Distance (SMF)
Power
Consumption
APC
Connector
Specifications
| Part Number | QDD-DR4-400G | Vendor Name | FB-LINK |
| Form Factor | QSFP-DD | Max Data Rate | 425Gbps(4x106.25Gb/s) |
| Wavelength | 1310nm | Max Cable Distance | 500m |
| Connector | MTP/MPO-12 | Media | SMF |
| Transmitter Type | DFB | Receiver Type | PIN |
| Tx Power | -2.9~4.0dBm | Rx Power | -5.9~4.0dBm |
| Power Consumption | ≤10W | Extinction Ratio | 3.5dB |
| Powerbudget | 3dB | Modulation | 8x50G PAM4 |
Compatibility & Platform Support
FB-LINK 400G QSFP-DD DR4 modules are fully tested and verified compatible with major networking platforms:
Certified Switch Compatibility
| Brand | Compatible Models | Min. Software Version |
|---|---|---|
| Cisco | Nexus 9316D-GX, 9332D-GX, 93600CD-GX, 9408, 9500 w/400G line cards, Catalyst 9500 | NX-OS 10.2(1)+, IOS-XE 17.x+ |
| Arista | 7800R3-36P-LC, 7800R3-36D-LC, 7500R3-24P-LC, 7280R3-24, 7280CR3-32P4 | EOS 4.25.x+ |
| Juniper | QFX5220-32CD, QFX5220-128C, QFX5230, QFX5240, PTX10001-36MR, PTX10003, PTX10008 | Junos Evolved 21.2R1+ |
| Dell EMC | PowerSwitch S5448F-ON, Z9332F-ON, Z9432F-ON, Z9664F-ON | OS10 10.5+ |
| HPE/Aruba | CX 9300-32D, CX 9300S, CX 10000 | AOS-CX 10.11+ |
| Huawei | CloudEngine CE9860-4C-EI/HI, CE8800, CE6800 | V200R020C00+ |
| NVIDIA/Mellanox | Spectrum-3 SN4700, Spectrum-4 SN5400/5600/5800 | Cumulus/SONiC |
| Edge-Core | AS9716-32D, AS9726-32DB, AS9737-32DB | ONIE/SONiC |
NIC Interoperability
| NIC Model | Interface | Connection Method |
|---|---|---|
| NVIDIA ConnectX-7 (OSFP) | OSFP 400G | Optical interop (same DR4 standard) |
| Broadcom BCM57608 | QSFP112 400G | Direct optical interop |
| Intel E810 (100GbE) | QSFP28 100G | 4×100G Breakout |
Breakout Configurations
| Configuration | Far-end Module | Max Distance | Cable Required |
|---|---|---|---|
| 4×100G-DR1 | QSFP28 100G-DR | 500m | MPO-12 to 4×LC Duplex |
| 4×100G-FR1 | QSFP28 100G-FR | 500m* | MPO-12 to 4×LC Duplex |
| 2×200G-DR2 | QSFP56-DD 200G-DR2 | 500m | MPO-12 trunk |
*Distance limited by shorter-reach module
QSFP-DD compatibility
FB-LINK develops and produces 100G QSFP28, 200G QSFP56, 400G QSFP112, 400G OSFP, and 800G OSFP.
Tested in Host Devices for Proven Interoperability
Every unit is quality tested for compatibility in the targeted switch environment, which guarantees flawless operations.
Application Scenarios
From hyperscale data centers to enterprise campus, meeting diverse high-speed interconnect needs.
Hyperscale Data Center Interconnect
High-speed interconnects between Spine switches in Spine-Leaf architecture. Supports 36-port/1U high-density deployment. Typical distance coverage: 100m-500m. Ideal for cloud service providers building massive east-west bandwidth infrastructure.
01
AI & GPU Cluster Networking
Interconnects for NVIDIA DGX H100/H200/B200, AMD MI300 AI servers. Supports NVIDIA Quantum-2 InfiniBand (NDR 400G) and Spectrum-4 Ethernet switches. Ultra-low latency for distributed training frameworks. Scales from 8-GPU nodes to 10,000+ GPU supercomputers.
02
100G to 400G Network Upgrade
Leverage breakout capability for investment-protected upgrades. Install 400G DR4 in new spine switch, connect to existing 100G QSFP28 DR modules via breakout cable, then upgrade 100G sites to 400G as needed. No forklift upgrade required.
03
Enterprise Campus Backbone
Connect campus buildings with high-speed backbone. 500m reach covers most campus distances. Lower fiber count than FR4 (parallel vs. CWDM). Core switch to aggregation layer high-speed interconnect. Future-proof infrastructure for 10+ years.
04
Breakout Connectivity
Flexible Breakout Configurations
The 400G QSFP-DD DR4 supports multiple breakout configurations for maximum deployment flexibility:
4×100G-DR1: Far-end QSFP28 100G-DR | Max 500m | MPO-12 to 4×LC Duplex cable
4×100G-FR1: Far-end QSFP28 100G-FR | Max 500m* | MPO-12 to 4×LC Duplex cable
2×200G-DR2: Far-end QSFP56-DD 200G-DR2 | Max 500m | MPO-12 trunk cable
*Distance limited by shorter-reach module
Recommended Cable: MTP/MPO-12 to 4×LC Duplex breakout patch cord
Free Custom EEPROM Coding for Seamless Integration
We provide free custom EEPROM coding to ensure seamless compatibility with your network equipment:
• Cisco-specific coding: QDD-400G-DR4-S
• Arista-specific coding: QDD-400G-DR4-AR
• Juniper-specific coding: QDD-400G-DR4
• Dell/HPE/Huawei-specific coding: Available on request
Turnaround Time: 1-2 business days additional
Industry-Recognized Certifications
FAQ About 400G QSFP-DD DR4 Optical Transceiver
Q: Will this module work with my Cisco or Arista switch?
A: Yes. It works out-of-the-box with most enterprise switches. To eliminate "unsupported transceiver" warnings, we offer free EEPROM coding tailored for Cisco, Arista, Juniper, and other platforms-just let us know your switch model when ordering.
Q: How does pricing compare to brand-name alternatives?
A: Expect 60-80% savings versus OEM-branded equivalents. We use identical Silicon Photonics technology and Broadcom DSP chips-the cost difference comes from eliminating brand markup, not cutting quality.
Q: What's covered under warranty?
A: 3-year coverage for defects and performance issues, plus a 30-day money-back guarantee. Extended 5-year options available for enterprise deployments.
Q: Is there a minimum order? How fast can I get it?
A: No MOQ-order even a single unit for evaluation. In-stock items ship within 1-3 business days. Volume discounts kick in at 100+ units.
Q: DR4 vs FR4 vs LR4-which do I need?
A: It depends on distance. DR4 covers up to 500m using 4 parallel fibers-best for intra-datacenter links. FR4 reaches 2km on 2 fibers via wavelength multiplexing. LR4 extends to 10km for campus backbones. For most rack-to-rack or row-to-row connections, DR4 offers the lowest cost and power draw.
Q: Can I connect this to my existing 100G equipment?
A: Absolutely. Use breakout mode to split one 400G port into four 100G connections via an MPO-to-LC cable. This lets you upgrade spine switches to 400G while keeping leaf switches at 100G-no forklift upgrade required.
Q: What makes QSFP-DD different from QSFP28?
A: Double the electrical lanes-8 versus 4-enabling 400G in a similar footprint. The connector is backward compatible, so you can still use QSFP28 modules in DD ports at lower speeds.
Q: Why PAM4 instead of traditional NRZ signaling?
A: PAM4 packs 2 bits per symbol (vs 1 bit in NRZ), doubling throughput without doubling the signaling frequency. This keeps electronics affordable while hitting 400G speeds. The built-in 7nm DSP handles the extra signal processing at under 10W.
Q: How do I install it?
A: Hot-swap friendly-no downtime needed. Clean the fiber ends, slide the module in until it clicks, connect your MPO-12 cable, done. Auto-negotiation handles the rest. For breakout mode, configure the port as "4x100G" in your switch CLI.
Q: Link errors or weak signal-what should I check?
A: Start with the basics: dirty connectors (clean with lint-free wipes), wrong fiber type (must be single-mode), or excessive bend radius. Verify the link is under 500m and your switch firmware meets the minimum version in our compatibility list. Check Tx/Rx power via CLI-abnormal readings point to cable or connector issues.
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