400GBASE-SR8 QSFP-DD Transceiver | 400G PAM4 850nm MMF 100m MPO-16 DDM - Refurbished

400GBASE-SR8 QSFP-DD 400G Multimode Transceiver

Upgrade your data center to 400 Gigabit Ethernet with this 400GBASE-SR8 QSFP-DD transceiver module — backed by Reef Telecom's industry-leading 10-year warranty. Delivers full 400Gbps throughput over multimode fiber at a fraction of OEM cost.

Technical Specifications

• Form Factor: QSFP-DD (Quad Small Form-Factor Pluggable Double Density)
• Data Rate: 400Gbps (8x50G PAM4 lanes)
• Standard: IEEE 802.3cm 400GBASE-SR8, QSFP-DD MSA CMIS Rev4.0
• Wavelength: 850nm VCSEL
• Connector: MTP/MPO-16 (APC)
• Max Reach: 70m on OM3 / 100m on OM4 multimode fiber
• Modulation: PAM4 (56G-VSR-PAM4)
• Power Consumption: <10W typical
• DDM: Digital Diagnostic Monitoring supported
• Operating Temp: 0°C to +70°C (Commercial)

Key Features

• Hot-swappable — install or replace without network downtime
• Breakout support: 2×200G-SR4 or 8×50G-SR configurations
• Built-in DSP chip for reliable high-speed signal integrity
• MSA-compliant — compatible with Cisco Nexus 9000, Arista 7060X/7260X, Aruba CX 10000, Juniper QFX5220, and other 400G switches
• Supports OM3, OM4, and OM5 multimode fiber

Ideal Applications

Designed for high-density 400GbE deployments in data center spine-leaf fabrics, AI/HPC GPU clusters, storage interconnects, and enterprise core networks. Perfect for organizations scaling to 400G without the cost of new OEM optics.

Free shipping on orders over $300. Volume pricing available for fabric-scale deployments. Every refurbished transceiver is fully tested and covered by our 10-year warranty.