Replacement for AT-9812T-40: Drop-In Alternatives We Stock
Looking for a replacement for the AT-9812T-40 (AT-9812T-40 - 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-40
| SKU | AT-9812T-40 |
|---|---|
| Product | AT-9812T-40 - 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-40 › |
Drop-in replacements for AT-9812T-40
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
DXS-1210-12SC - D-Link 25.22W 10-Port 240Gbps Managed Gigabit Ethernet Switch with 2 Combo 10 Gigabit SFP+ Ports Rack-mountable
SKU: DXS-1210-12SC
Price: $2,254.74
HP J8698-8099 ProCurve 5400 zl Series 5412zl-96G 96xRJ-45 Ports 1000Base-T + 8xopen module Slots Layer 4 Managed Gigabit Ethernet Switch
SKU: J8698-8099
Price: $170.53
JG240-61201 - HP 5500-48G-PoE+ 48 x Ports 10/100/1000Base-T 4 x SFP Layer-4 Managed Gigabit Ethernet Network Switch
SKU: JG240-61201
Price: $331.58
HPE 797211-001 6127XLG 4-Ports 40GbE QSFP+ 8-Ports 10GbE SFP+ Layer 3 Manageable Gigabit Ethernet Blade Network Switch
SKU: 797211-001
Price: $447.37
463-6162 - Dell PowerConnect X4012 12 x Ports 10GBase-T Layer 2 Managed 10 Gigabit Ethernet Network Switch
SKU: 463-6162
Price: $1,697.68
X4012 - Dell PowerConnect X4012 12 x Ports 10 Gigabit Ethernet SFP+ Rack-Mountable Layer 2 Managed Switch
SKU: X4012
Price: $1,874.53
0X4012 - Dell PowerConnect X4012 12 x Ports 10 Gigabit Ethernet SFP+ Rack-Mountable Layer 2 Managed Switch
SKU: 0X4012
Price: $1,962.95
210-ADPE - Dell PowerConnect X4012 12 x Ports 10GBase-T Layer 2 Managed 10 Gigabit Ethernet Network Switch
SKU: 210-ADPE
Price: $2,203.16
IE-4000-8GT8GP4G-E - Cisco 4000 PoE RJ-45 12 X + + Ports 1000Base-X + 4 x SFP Layer 3 Managed Gigabit Ethernet Switch
SKU: IE-4000-8GT8GP4G-E
Price: $2,601.74
IE-4000-4GS8GP4G-E - Cisco 4000 PoE RJ-45 12 X + + Ports 1000Base-X + 4 x SFP Layer 3 Managed Gigabit Ethernet Switch
SKU: IE-4000-4GS8GP4G-E
Price: $6,126.25
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.