Replacement for USB21000S2: Drop-In Alternatives We Stock
Looking for a replacement for the USB21000S2 (USB21000S2 - StarTech OneConnect USB 2.0 TO Gigabit Ethernet NIC Network Adapter)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the USB21000S2
| SKU | USB21000S2 |
|---|---|
| Product | USB21000S2 - StarTech OneConnect USB 2.0 TO Gigabit Ethernet NIC Network Adapter |
| Current price | $113.68 |
| Stock status | In Stock |
| Detail page | View USB21000S2 › |
Drop-in replacements for USB21000S2
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
USB31000SW - StarTech OneConnect USB 3.0 TO Gigabit Ethernet NIC Network Adapter - Network Adapter - SuperSpeed USB 3.0
SKU: USB31000SW
Price: $75.79
ST1000SPEX42 - StarTech OneConnect 4 Port PCI Express Gigabit Ethernet NIC Network Adapter Card - 4 - Twisted Pair - FULL-HEIGHT
SKU: ST1000SPEX42
Price: $565.32
PEXUSB7LP - StarTech OneConnect 7 Port PCI Express Low Profile HIGH SPEED USB 2.0 Adapter Card - 6 X TYPE A FEMALE USB 2.0 USB External
SKU: PEXUSB7LP
Price: $182.37
PCI220USBLP - StarTech OneConnect 3 Port PCI Low Profile HIGH SPEED USB 2.0 Adapter Card USB Adapter 3 Ports
SKU: PCI220USBLP
Price: $205.26
ST2000PEXPSE - StarTech OneConnect Dual-Port PCI Express Gigabit Ethernet PCI Express Network Card Adapter - POE/PSE - Network Adapter
SKU: ST2000PEXPSE
Price: $263.16
USB32000SPT - StarTech USB 3.0 to Dual Port Gigabit Ethernet Adapter NIC with USB Pass-through2 X RJ45Twisted Pair
SKU: USB32000SPT
Price: $160.00
PEXUSB3S11 - StarTech OneConnect 2 Port PCI Express SuperSpeed USB 3.0 Card - 1 Internal 1 External - USB Adapter
SKU: PEXUSB3S11
Price: $117.89
USB2106S - StarTech OneConnect USB 2.0 TO 10/100Mb/s Ethernet Network Adapter
SKU: USB2106S
Price: $143.39
PEX1000SFP2 - StarTech OneConnect PCI Express Gigabit Ethernet FIBER Network Card W/ OPEN SFP - Network Adapter
SKU: PEX1000SFP2
Price: $289.47
PEX10000SFP - StarTech OneConnect PCI Express 10 Gigabit Ethernet FIBER Network Card - OPEN SFP+ - Network Adapter
SKU: PEX10000SFP
Price: $344.84
ST1000SPEXD4 - StarTech OneConnect Dual-Port Gigabit PCI Express Server Network Adapter Card - Network Adapter
SKU: ST1000SPEXD4
Price: $191.58
EC1000S - StarTech OneConnect ExpressCard Gigabit Ethernet Network Adapter Card
SKU: EC1000S
Price: $303.50
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.