Sourced for enterprise IT teams, the NEC MCX354A-TCAT (MCX354A-TCAT - Mellanox ConnectX-3 VPI Adapter Card, Dual-Port QSFP,FDR10 IB (40GB/S) and 10GbE, PCI Express 3.0 X8 8GT/S, ROHS R6) is a Network Adapters component appropriate for new-build, expansion, or warranty-replacement procurement. Technical specifications include capacity of 40 GB, bus speed of 8 GT/s, interface of PCI Express, data rate of 40 Gb/s, network speed of 10 GbE, features of QSFP. Appropriate for enterprise core-aggregation tier, hyperscale leaf-spine fabric expansion, EVE-NG / GNS3 lab environments at scale, and matched-pair high-availability switching deployments. Pro Disk Network supplies the MCX354A-TCAT to US business buyers. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The MCX354A-TCAT is a NEC network adapters component with capacity 40 GB, bus speed 8 GT/s, interface PCI Express. Pro Disk Network sells the MCX354A-TCAT for $343.87 with same-day US shipping and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the MCX354A-TCAT are shown on this page.
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Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: Is the MCX354A-TCAT compatible with my switch?
Pro Disk Network validates every MCX354A-TCAT against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the MCX354A-TCAT ship?
Pro Disk Network dispatches the MCX354A-TCAT same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
The MCX354A-TCAT is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
DCI (Data Center Interconnect) — Inter-DC routing or aggregation. LR4/LR8 transceivers for 10–80 km, ER4 for 40 km, ZR4 for coherent long-haul.
Campus Distribution — Catalyst-class campus distribution between IDF and MDF closets. PoE+ where wireless APs and IP phones share infrastructure.
Branch / Edge — Smaller form-factor switches and routers for branch sites. SD-WAN-compatible or static-VPN-attached as the architecture dictates.
What is the MCX354A-TCAT?
The MCX354A-TCAT is a NEC enterprise networking device with capacity 40 GB and bus speed 8 GT/s, manufactured by NEC. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of MCX354A-TCAT
Pros
Same-day US shipping cuts deployment downtime
Cons
Not for hyperscale ZR coherent — different SKU family
Some vendors deprecate firmware on EOL part numbers
Mismatched optic+switch firmware can require manual override
Frequently Asked Questions about MCX354A-TCAT
Is the MCX354A-TCAT a genuine NEC part?
Yes. Pro Disk Network sources every MCX354A-TCAT as factory-original NEC inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned NEC servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Is the MCX354A-TCAT compatible with my switch?
Pro Disk Network validates every MCX354A-TCAT against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the MCX354A-TCAT ship?
Pro Disk Network dispatches the MCX354A-TCAT same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
What is the warranty on the MCX354A-TCAT?
New MCX354A-TCAT units carry the full NEC manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the MCX354A-TCAT?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility
If you are running a multi-vendor leaf-spine architecture (Arista leaves and Cisco spines, for example), order optics coded for each endpoint separately. Optics in DAC and AOC cables are factory-coded to each end and cannot be flashed in-field. Plan the coding split at design time and document it in your network drawings.
Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage
Sizing network bandwidth for a leaf-spine fabric using the MCX354A-TCAT starts with the workload mix. For general-purpose virtualisation, plan 10G server-to-leaf, 25G or 40G leaf-to-spine; oversubscription up to 4:1 is acceptable. For hyperconverged storage (vSAN, Ceph, Storage Spaces Direct), plan 25G server-to-leaf at minimum, 100G leaf-to-spine, oversubscription 1.5:1 maximum. East-west traffic dominates in HCI clusters and starves on oversubscribed fabrics.