400GBASE-SR8 QSFP-DD Optical Transceiver — NVIDIA Mellanox Compatible

Upgrade your data center to 400G Ethernet with this Reef Optics 400GBASE-SR8 QSFP-DD transceiver module. Engineered for high-density 400 Gigabit Ethernet connectivity, this module delivers reliable, high-speed performance at a fraction of OEM cost — backed by Reef Telecom's industry-leading 10-year warranty.

Key Specifications

• Data Rate: 400Gbps (8x50G PAM4)
• Form Factor: QSFP-DD (Quad Small Form-factor Pluggable Double Density)
• Wavelength: 850nm VCSEL
• Max Distance: 100m over OM4 MMF / 70m over OM3 MMF
• Connector: MTP/MPO-16 APC
• Digital Optical Monitoring (DOM): Yes
• Standards: IEEE 802.3bs, 400GAUI-8/CEI-56G-VSR-PAM4, QSFP-DD MSA
• Breakout Support: 2×200G-SR4 and 8×50G-SR
• Power Consumption: <10W
• Temperature: Commercial (0°C to +70°C)
• Compatibility: NVIDIA Mellanox — drop-in replacement, will not void switch warranty

Why Buy from Reef Telecom?

• 10-year warranty — the longest in the industry
• Free shipping on orders over $300
• 100% compatibility tested and guaranteed
• Same-day shipping on in-stock items

Ideal Use Cases

Perfect for data center spine-leaf architectures, high-performance computing (HPC) clusters, AI/ML training networks, and enterprise core switching environments requiring short-reach 400GbE multimode fiber connectivity between switches and servers.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.