Belkin F5D5000 PCI 10/100 Ethernet Network Card RJ45 F300121102 NIC

Belkin F5D5000 PCI 10/100 Ethernet Network Card RJ45 F300121102 NIC

The Belkin F5D5000 is a PCI Fast Ethernet network interface card (NIC) that adds a single 10/100 Mbps Ethernet port to any desktop PC with an available PCI slot. It connects via a standard RJ45 jack and supports both 10Base-T and 100Base-TX operation with auto-negotiation. Part number F300121102 is printed on the PCB.

Specifications & What's Included

• Brand: Belkin
• Model: F5D5000
• Part Number: F300121102
• Interface: PCI (32-bit)
• Network Speed: 10/100 Mbps (10Base-T / 100Base-TX)
• Port: 1x RJ45 Ethernet
• Main Controller Chip: MPX (visible on PCB)
• Form Factor: Standard PCI card with full-height bracket
• Certifications: CE, FCC (markings visible on PCB)
• Card only — no drivers disc or accessories included

Applications

PCI 10/100 Ethernet NICs like the Belkin F5D5000 were the standard way to add or replace network connectivity in desktop PCs during the late 1990s and early 2000s, when built-in Ethernet on motherboards was not yet universal. These cards plug into the PCI bus and expose a single RJ45 jack for connection to a switch, router, or patch panel running standard Cat5/Cat5e cabling. They remain useful today for older desktops lacking onboard LAN, for machines where the onboard NIC has failed, or for adding a dedicated network interface in systems used for legacy software, point-of-sale environments, or industrial control PCs that still rely on PCI-slot expansion. The 10/100 speed tier is adequate for most legacy and light-duty network tasks on older hardware.