Product Detail：
H3C QSFPDD-400G-SR8-MM850 Compatible 400G QSFP-DD SR8 PAM4 Optical Transceiver Module | HYTOPTODEVICE
The HYTOPTODEVICE QSFPDD-400G-SR8-MM850 is a high-density, premium H3C compatible 400GBASE-SR8 transceiver module. It is meticulously designed for high-performance computing (HPC), AI data centers, and enterprise core networks requiring massive throughput over short distances. This high-speed optical module operates at a total data rate of 400Gbps using 8 parallel channels of 50G PAM4 technology.Utilizing a 850nm VCSEL laser, the 400g qsfp-dd sr8 provides a reliable connection up to 100 meters over OM4/OM5 multimode fiber (MMF) and 70 meters over OM3. It is equipped with a high-density MPO-16/APC connector to ensure signal stability in high-radix switching environments. Fully compliant with QSFP-DD MSA and IEEE 802.3bs standards, HYTOPTODEVICE guarantees 100% interoperability with H3C S12500 and S9800 series switches, ensuring a stable long-term supply for your network infrastructure.
Compatibility and Supported Devices
The HYTOPTODEVICE H3C QSFPDD-400G-SR8-MM850 pluggable transceiver is specifically coded and hardware-verified for 100% seamless integration with:
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H3C S12500 Series: S12500-G, S12500-G2, S12500-AF (with 400G line cards).
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H3C S9800 Series: S9825-64CDQ, S9825-32DQ, S9850 series.
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H3C S6800 Series: S6850, S6805-54HF (400G uplink variants).
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H3C UniServer Platforms: Compatible with 400G QSFP-DD network interface cards installed in H3C high-performance servers.
Primary Application Scenarios
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AI & Deep Learning Clusters: Providing ultra-high bandwidth for GPU-to-Switch interconnections in H3C-based AI fabrics.
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Spine-Leaf Architecture: Ideal for high-density Leaf-to-Spine links in modern 400G data centers.
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400G to 2x 200G or 8x 50G Breakout: Enables flexible connectivity from a 400G core switch to lower-speed 50G or 200G distribution layers using MPO-16 breakout cables.
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Enterprise Core Expansion: Cost-effective multimode solution for upgrading enterprise backbone networks to 400G speeds within a 100m radius.
Key Product Parameters
| H3C Compatible |
QSFPDD-400G-SR8-MM850 |
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 |
Connectivity Solutions(Applications)：
Scenarios 1:400G Switch Link 400G Switch
Scenarios 2:400G Switch Link 50G Switch
Scenarios 3:400G Switch Link 200G NIC
FAQ for H3C QSFPDD-400G-SR8-MM850 Compatible QSFP-DD 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 H3C QSFPDD-400G-SR8-MM850?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, sufficient inventory, fast delivery, and quick response.
Q7:The link is "Up" but I have high packet loss. Why? A:There could be two reasons,1. Dirty connectors:tiny dust particles can obstruct signal transmission. Please use fiber optic cleaner to clean the connector. 2. Fiber optic cable bending: avoid severe bending of the fiber optic cable.
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 H3C QSFPDD-400G-SR8-MM850?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:
