What Is EdgeCore Compatible ET7502-SR8 Optical Transceiver?
400G SR8 Transceiver | EdgeCore Compatible 400G QSFP-DD Optical Transceiver Module(MMF, 850nm, 100m, MPO-16, DOM) | HYTOPTODEVICE
Unlock high-speed data center performance with the HYTOPTODEVICE 400G QSFP-DD SR8 PAM4 optical transceiver module. This 400G QSFP-DD SR8 transceiver is fully compatible with the EdgeCore ET7502-SR8 model and designed for short-range 400G Ethernet applications.Operating at 850nm over OM4 multimode fiber (MMF), it supports data rates up to 425Gbps and reaches up to 100 meters using an MTP/MPO-16 connector. Built with advanced PAM4 modulation and a high-performance DSP chip, this QSFP-DD 400G SR8 module ensures reliable, low-power, and high-density connectivity.The HYTOPTODEVICE 400G SR8 transceiver is fully compliant with industry standards, including the QSFP-DD MSA, IEEE 802.3bs, and 400GAUI-8/CEI-56G-VSR-PAM4 specifications. Ideal for hyperscale data centers, cloud networking, and high-performance computing environments.
Key Technical Specifications of 400G Optical Transceiver
| EdgeCore Compatible |
ET7502-SR8 |
Vendor Name |
HYTOPTODEVICE |
| Form Factor |
QSFP-DD |
Max Data Rate |
425Gbps |
| Wavelength |
850nm |
Max Distance |
70m on OM3/100m on OM4 |
| Modulation Format |
PAM4 |
Host Required |
FEC |
| Connector |
MTP/MPO-16 |
Voltage Supply |
3.3V |
| Cable Type |
MMF |
DDM Support |
Yes |
| TX Power |
-6.5~+4.0dBm |
Receiver Sensitivity |
< -7.9dBm |
| Transmitter Type |
VCSEL 850nm |
Receiver Type |
PIN |
| Maximum Power |
< 10W |
Operation Temperature |
0 to 70°C (32 to 158°F) |
| Application |
400G Ethernet, Data Center Interconnect, Infiniband Interconnects |
Protocols |
QSFP-DD MSA, CMIS 4.0, IEEE 802.3cd |
Full Compatibility List and Supported Devices of 400G Transceiver Modules
The HYTOPTODEVICE EdgeCore ET7502-SR8 pluggable transceiver is hardware-verified and firmware-optimized for 100% seamless integration with:
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EdgeCore AS9716-32D: 32-port 400G Open Networking Switch (Tomahawk 3).
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EdgeCore AS9726-32DB: High-radix 400G data center switches.
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EdgeCore AS7926-40XKFB: 100G/400G high-density spine-leaf switches.
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EdgeCore ECS5010 Series: Selected 400G uplink configurations.
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Open Network Systems: Fully compatible with white-box platforms running SONiC, Cumulus Linux, or DENT.
Primary Application Scenarios of Compatible 400G Fiber Transceiver
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Hyperscale Leaf-to-Spine: Primary short-reach interconnect for high-density 400G leaf-and-spine architectures in cloud data centers.
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AI Cluster Fabric: Providing the massive, low-latency bandwidth required for GPU-to-Switch training fabrics in AI/ML environments.
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400G to 2x 200G or 8x 50G Breakout: The 8-lane design allows for high-density fan-out to legacy 50G or 200G nodes using MPO-16 breakout cables.
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Open Networking Deployments: Ideal for cost-effective 400G upgrades in disaggregated networking environments where third-party compatibility is a priority.
Connectivity Solutions(Applications) of 400G Optical Transceiver SR8 for Data Center
Scenarios 1:400G Switch Link 400G Switch
Scenarios 2:400G Switch Link 50G Switch
Scenarios 3:400G Switch Link 200G NIC
FAQ for 400G QSFP-DD SR8 Transceiver Modules
Q1:What is QDD-400G-SR8? A:The 400G QSFP-DD SR8 is a hot pluggable optical transceiver module with a speed of 400Gbps, a wavelength of 850nm, and a transmission distance of up to 100m with OM4 MMF. It is ideal for data centre, 400G Ethernet and Infiniband Interconnects.
Q2:What is the maximum transmission distance of the 400G QSFP-DD SR8 transceiver?A:HYTOPTODEVICE QSFP-DD 400G SR8 module supports the maxium transmitting distance of up to 100m with OM4 MMF.
Q3:What fiber connector is required for the EdgeCore ET7502-SR8?A:The 400G QSFP DD SR8 module uses an MPO-16/APC connector. It is very important for 400G/800G MMF links to use the APC (Angled Physical Contact) polish. that can minimize back-reflection and maintain signal quality.
Q4:How does this differ from the 400G-DR4 or SR4 modules?A:DR4 is for single-mode fiber (500m), the SR8 is a short-reach (100m) multimode solution. Unlike the SR4 (4-lane), the 400G QSFP-DD SR8 uses 8 parallel lanes, providing better granularity for 50G/100G breakout applications in high-density AI clusters.
Q5:Does the HYTOPTODEVICE QSFP-DD-400G-SR8 support breakout to 50G?A:Yes. The 400G QSFP-DD SR8 utilizes parallel SR8 architecture, supporting 8x50G breakout. that allows you to connect one 400G OSFP port to eight separate 50G SFP56 SR ports with an MPO-16 breakout cable. 400G QSFP-DD SR8 manufacturer china HYTOPTODEVICE support breakout to 50G.
Q6:Where to buy 400G QSFP DD SR8 optical transceiver?A:There are many manufacturers that produce and sell 400G fiber optical modules, but 400G QSFP-DD SR8 manufacturer china HYTOPTODEVICE is the excellent provider: a source factory, fully controllable process, reliable performance, 100% compatible, cost-effective,sufficient inventory, fast delivery, and quick response.
Q7:What are the best 400G optical module for data center?A:The "best" optical module depends entirely on the transmission distance and fiber infrastructure required. please see the below:
| NO. |
Reach |
Module Type |
Fiber Type |
Interface / Connector |
Core Application & Best Use Case |
| 1 |
< 7m |
400G DAC / ACC |
Copper (Direct Attach) |
QSFP-DD / OSFP |
Intra-Rack (Server to ToR): Ultra-low latency, near-zero power consumption, and the lowest cost. Best for connecting servers (NICs) directly to Top-of-Rack switches. |
| 2 |
< 30m |
400G AOC |
Active Optical Cable |
Built-in (Direct) |
Inter-Rack / Clusters: Lighter and more flexible than copper. Widely used for high-density interconnects within AI compute clusters (e.g., NVLink architectures). |
| 3 |
< 100m |
400G SR8 |
Multi-Mode (MMF) |
MPO-16 / MPO-24 |
Short-Reach Backbone: The traditional multi-mode choice. Uses 8 channels (50G PAM4 per lane). The module cost is low, making it ideal for massive short-distance deployments. |
| 4 |
< 100m |
400G SR4.2 (BiDi) |
Multi-Mode (MMF) |
MPO-12 |
Fiber-Saving Short Reach: Utilizes bidirectional wavelength-division multiplexing to deliver 400G over just 8 fibers (MPO-12), cutting fiber cabling costs in half compared to SR8. |
| 5 |
500m |
400G DR4 ⭐ (Mainstream) |
Single-Mode (SMF) |
MPO-12 |
Leaf-Spine Architecture Workhorse: The most recommended module inside modern cloud data centers. Supports 1-to-4 breakout (splitting a 400G port into four 100G DR links) for maximum flexibility. |
| 6 |
2km |
400G FR4 ⭐ (Mainstream) |
Single-Mode (SMF) |
Duplex LC |
Core / Inter-Building Aggregation: Uses CWDM (Coarse Wavelength Division Multiplexing) to multiplex 4 wavelengths over a single pair (2 fibers) of SMF. Drastically reduces expensive fiber patching infrastructure over longer runs. |
| 7 |
10km |
400G LR4 |
Single-Mode (SMF) |
Duplex LC |
Campus Backbone: Designed for long-range high-speed backbones linking different buildings across a large campus or connecting hyper-scale core layers. |
| 8 |
40km - 120km |
400ZR / 400ZR+ |
Single-Mode (SMF) |
Duplex LC |
Data Center Interconnect (DCI): Employs coherent optical technology for metro DCI networks, allowing direct switch-to-switch connections over long distances without external transponder chassis. |
Q8:Is the 400G QSFP-DD SR8 backward compatible with lower-speed modules,such as 100G?A:Yes,The 400G SR8 is backward compatible with lower-speed optical transceivers, such as 200G,100G and 50G, but the performance will be reduced.
Q9:How do HYTOPTODEVICE ensure 400G QSFP-DD SR8 module compatibility with network switch?A:Ensuring 100% compatibility, optical modules must be coded to match the switch's requirements. Source-factory HYTOPTODEVICE was equipped with various high-speed switch,the brands include such as Cisco,NVIDIA,Huawei. highly professional in coding equipment for various brands to ensure they are recognized and running in your device.
Q10:Is QDD-400G-SR8 hot-swappable?A:HYTOPTODEVICE fiber transceiver modules are hot-pluggable, hot Pluggable QSFP-DD MSA Compliant.you can plug or unplug the optical transceiver, while the device is powered on without damaging the hardware.
Q11:Why Choose HYTOPTODEVICE for EdgeCore ET7502-SR8?A: High-Speed Optical Transceiver Manufacturer China HYTOPTODEVICE ensures that the QDD-400G-SR8 is coded and tested for full compatibility with major switch vendors (such as Cisco, Juniper, NVIDIA/Mellanox, and huawei). They verify the EEPROM settings to ensure "plug-and-play" functionality without port-recognition errors.
Q12：Does it use MPO-12 or MPO-16？A:The 400G QSFP-DD SR8 must use MPO-16 (APC) connectors. The reason is that SR8 uses 8 channels for transmission (Tx) and 8 channels for reception (Rx) (a total of 16 optical fibers). and MPO-12 fiber optic cables were not suitable.
Why Network Engineers Choose HYTOPTODEVICE
HYTOPTODEVICE has supplied over 500,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.
- 100% MSA-compliant modules with Cisco, Huawei,Dell,Juniper, and Arista compatibility
- ISO 9001:2015 certified manufacturing facility in Shenzhen
- Average lead time of 3–5 business days with DHL/FedEx express options
- Dedicated pre-sales engineering support for custom configurations
- Actual hardware,actual switches,actual results.we publish compatibility test video,eliminate compatibility anxiety. you can watch before you buy.
- We can provide inspection and shipping videos to make you feel as if you are right here with the product.
"We replaced 200 Cisco-branded SFPs with HYTOPTODEVICE equivalents across our spine layer — zero compatibility issues, 40% cost reduction."— Network Architect, Tier-2 ISP, Germany
Quality Certification & Compliance：
At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final inspection, our processes ensure global compliance and reliability.
We adhere to rigorous standards for our SFP modules and network solutions:
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ISO 9001: Certified quality management and production consistency.
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CE & FCC: Fully compliant for seamless Global Market Access.
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RoHS: Committed to environmental responsibility and hazardous material control.
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Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.
Certified Quality. Global Standards. Guaranteed Performance.
Rigorous Industrial Product Testing：
100% 3rd Party Compatible：
Partial Test Demonstration：
Others:
