Replacement for AT-9812T-20: Drop-In Alternatives We Stock
Looking for a replacement for the AT-9812T-20 (AT-9812T-20 - Allied Telesis Gigabit Ethernet Switch 12 x 1000Base-T LAN 4 x GBIC Layer 3 Switch)? 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 AT-9812T-20
| SKU | AT-9812T-20 |
|---|---|
| Product | AT-9812T-20 - Allied Telesis Gigabit Ethernet Switch 12 x 1000Base-T LAN 4 x GBIC Layer 3 Switch |
| Stock status | In Stock |
| Detail page | View AT-9812T-20 › |
Drop-in replacements for AT-9812T-20
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.
HPE R0X39-61201 Aruba 6400 48-Ports PoE 1000Base-T RJ-45 Gigabit Ethernet 4-Portss 50GBase-X 50 Gigabit Ethernet SFP56 Plug-in Module Switch Module
SKU: R0X39-61201
Price: $13,348.74
Allied AT-2712LX20/SC-901 Telesis 100Mbps PCI Express Secure Fast Ethernet Fiber Adapter Card
SKU: AT-2712LX20-SC-901
Price: $517.12
3CRWX120695A - 3Com Wireless LAN Switch WX1200 Fast EN 8-Port Lan Switch
SKU: 3CRWX120695A
Price: $521.37
HPE JE069-61001 HP JE069-61001 5120 Series 5120-48G EI 44xPorts 10/100/1000Base-T + 4xCombo Gigabit SFP Ports Layer3 Managed Gigabit Ethernet Switch
SKU: JE069-61001
Price: $273.68
HPE JE069-61201 HP JE069-61201 5120 Series 5120-48G EI 44xPorts 10/100/1000Base-T + 4xCombo Gigabit SFP Ports Layer3 Managed Gigabit Ethernet Switch
SKU: JE069-61201
Price: $273.68
DGS-1210-20 - D-Link 16-Port 10/100/1000 Managed Gigabit Ethernet Switch with 4 Gigabit SFP Ports
SKU: DGS-1210-20
Price: $565.32
HPE JG245-61001 HP JG245-61001 A5120-24G EI 24 x Ports 10/100/1000 + 4 x Combo Gigabit SFP Rack-mountable Layer 3 Managed Gigabit Ethernet Network Switch
SKU: JG245-61001
Price: $602.11
HPE JG245AR EI A5120-24G 24-Ports 10/100/1000 + 4xCombo Gigabit SFP Rack-mountable Layer 3 Managed Gigabit Ethernet Network Switch
SKU: JG245AR
Price: $602.11
DGS-3420-28SC - D-Link 20-Port 128Gb/s 10-Gigabit SFP+ Rack Mountable Gigabit Ethernet Switch
SKU: DGS-3420-28SC
Price: $1,724.80
AT-PWR4-10 - Allied Telesis 80-Watts 100-220V Redundant Power Supply for MCR12 Chassis
SKU: AT-PWR4-10
Price: $393.63
J4907-61201 - HP ProCurve Switch 5300XL 16-Ports 10/100/1000Base-T Gigabit Ethernet Network Switch Expansion Module
SKU: J4907-61201
Price: $182.37
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.