Replacement for 3873-AR3: Drop-In Alternatives We Stock
Looking for a replacement for the 3873-AR3 (Lenovo 3873-AR3 B300 24 x Ports SFP+ 8Gb/s (16 x Ports Active) Managed 1U Rack-Mountable Fibre Channel SAN Switch. In Stock)? Pro Disk Network ships IBM 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 3873-AR3
| SKU | 3873-AR3 |
|---|---|
| Product | Lenovo 3873-AR3 B300 24 x Ports SFP+ 8Gb/s (16 x Ports Active) Managed 1U Rack-Mountable Fibre Channel SAN Switch. In Stock |
| Stock status | In Stock |
| Detail page | View 3873-AR3 › |
Drop-in replacements for 3873-AR3
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.
2498-F48 - IBM SAN48B-5 48-Port 16GB Fibre Channel SAN Switch 36 Active Ports
SKU: 2498-F48
Price: $1,802.11
0A65730 - IBM Lenovo 8GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 240-Pin DIMM Dual Rank Memory Module
SKU: 0A65730
Price: $167.34
03T7219 - IBM / Lenovo 8GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 Dual Rank 240-Pin DIMM Memory Module
SKU: 03T7219
Price: $187.37
45K0216 - IBM / Lenovo 4GB DDR3-1333MHz PC3-10600 non-ECC Unbuffered CL9 240-Pin DIMM Dual Rank Memory Module
SKU: 45K0216
Price: $92.21
00P9547 - IBM Lenovo 16GB DDR3-1066MHz PC3-8500 ECC Registered CL7 240-Pin DIMM Quad Rank Memory Module
SKU: 00P9547
Price: $101.74
03T7220 - IBM Lenovo 2GB DDR3-1600MHz PC3-12800 ECC Unbuffered CL11 240-Pin DIMM Memory Module for ThinkCentre M83
SKU: 03T7220
Price: $102.22
67Y0016 - IBM Lenovo 4GB DDR3-1333MHz PC3-10600 ECC Registered CL9 240-Pin DIMM Dual Rank Memory Module for ThinkServer RD220 (Type 3798)
SKU: 67Y0016
Price: $103.67
03T7218 - IBM Lenovo 4GB DDR3-1600MHz PC3-12800 ECC Unbuffered CL11 240-Pin DIMM Memory Module for ThinkCentre M83
SKU: 03T7218
Price: $109.78
92P1021 - IBM / Lenovo 72-Watts Input 100-240V AC Output 16V 4.5A Power Adapter for ThinkPad
SKU: 92P1021
Price: $236.18
92P1017 - IBM / Lenovo 72-Watts Input 100-240V AC Output 16 V DC 4.5A Power Adapter for T Series T20 / T21
SKU: 92P1017
Price: $236.49
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.