Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE
Brand: Mellanox | Category: Transceivers & Cables
SKU: MEL-MCX516A-CDAT | Part #: MCX516A-CDAT | MPN: MCX516A-CDAT
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About the Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE
This QSFP28 full-height, half-length PCIe card form factor ensures efficient rack cable management and compatibility with standard server slot configurations. The Mellanox MCX516A-CDAT ConnectX-5 EN adapter delivers flexible, high-speed Ethernet connectivity with dual QSFP28 ports supporting direct-attach copper, active optical cables, and optical transceiver modules for enterprise data center environments.
The MCX516A-CDAT offers network engineers and IT infrastructure teams a versatile solution for demanding workloads requiring multi-speed Ethernet support. With aggregate bidirectional bandwidth of 200 Gb/s and support for 10GbE, 25GbE, 40GbE, 50GbE, and 100GbE speeds, this Mellanox adapter accelerates storage, HPC, and cloud deployments. Advanced hardware offloads including TCP/UDP/IP checksum, LSO, RSS, and VXLAN/NVGRE/GRE encapsulation reduce CPU overhead, while RoCE v1 and v2 RDMA support enable low-latency, high-throughput communication. Hardware-based flow steering with intelligent match-action tables optimizes packet processing, and IEEE 1588 PTP hardware timestamping ensures precision timing for synchronized applications. The adapter supports up to 255 virtual functions per port via SR-IOV for flexible multi-tenant deployments. Operating across Linux OFED, VMware ESXi, and Windows Server platforms, the adapter integrates seamlessly into heterogeneous environments. Mellanox OFED drivers and Mellanox Firmware Tools enable straightforward deployment and firmware management. With PCIe 3.0 x16 host interface connectivity and typical power consumption of approximately 24.9 W, the adapter delivers enterprise-grade performance while maintaining thermal efficiency across the 0°C to 55°C operating temperature range. Full regulatory compliance including CE, FCC, and RoHS certification ensures deployment readiness in regulated markets.
Key Specifications
- Manufacturer Part Number: MCX516A-CDAT
- Network Ports: 2x QSFP28
- Supported Ethernet Speeds: 10GbE, 25GbE, 40GbE, 50GbE, 100GbE
- Aggregate Bandwidth: 200 Gb/s bidirectional
- Host Interface: PCIe 3.0 x16
- RDMA Support: RoCE v1, RoCE v2
For detailed specifications, compatibility validation, and procurement assistance, contact Omnixon Global to request a quotation.
Technical Specifications
| Brand | Mellanox |
| Category | Transceivers & Cables |
| SKU | MEL-MCX516A-CDAT |
| Part Number | MCX516A-CDAT |
| Condition | New |
| Capacity | 100Gb |
| Form Factor | HHHL |
| Interface | PCIe 3.0 x16 |
| Speed | 10/25/40/50/100GbE |
| Manufacturer Part Number | MCX516A-CDAT |
| Product Family | ConnectX-5 EN |
| Network Ports | 2x QSFP28 |
| Supported Ethernet Speeds | 10GbE, 25GbE, 40GbE, 50GbE, 100GbE |
| Aggregate Bandwidth | 200 Gb/s bidirectional |
| Host Interface | PCIe 3.0 x16 |
| Form Factor | Full-height, half-length (FHHL) PCIe card |
| RDMA Support | RoCE v1, RoCE v2 |
| SR-IOV Virtual Functions | Up to 255 VFs per port |
| Hardware Offloads | TCP/UDP/IP checksum, LSO, RSS, VXLAN, NVGRE, GRE encapsulation/decapsulation |
| Flow Steering | Advanced hardware-based flow steering with large match-action table |
| PTP Hardware Timestamping | IEEE 1588 PTP supported |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -40°C to 70°C |
| Power Consumption (typical) | Approximately 24.9 W (adapter only, excluding transceiver modules) |
| Operating Systems | Linux (OFED), VMware ESXi, Windows Server |
| Connector Type | QSFP28 (supports direct-attach copper, active optical cable, and optical transceiver modules) |
| Regulatory Compliance | CE, FCC, RoHS |
| Management | Mellanox OFED, firmware update via MFT (Mellanox Firmware Tools) |
Frequently Asked Questions about Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE
What does the Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE do?
The Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE is enterprise IT hardware deployed in production data centers, server rooms, and edge sites across the GCC and EMEA region.
What are the headline specs of the Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE?
Key specifications for the Mellanox MCX516A-CDAT ConnectX-5 EN Adapter, 2x QSFP28, 10/25/40/50/100GbE: capacity 100Gb; form factor HHHL; interface PCIe 3.0 x16; new condition; adapter family ConnectX-5 EN Adapter; network ports 2x QSFP28; supported speed 10/25/40/50/100GbE; host interface PCIe 3.0 x16; form factor HHHL; use case High-performance server networking, virtualization, storage, AI, and cloud. Manufacturer part number MCX516A-CDAT. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.