Replacement for C3945-AX-K9: Drop-In Alternatives We Stock
Looking for a replacement for the C3945-AX-K9 (3 Cisco 3945 Router Ports - Management Port - 15 Slots)? Pro Disk Network ships Cisco 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 C3945-AX-K9
| SKU | C3945-AX-K9 |
|---|---|
| Product | 3 Cisco 3945 Router Ports - Management Port - 15 Slots |
| Stock status | In Stock |
| Detail page | View C3945-AX-K9 › |
Drop-in replacements for C3945-AX-K9
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.
15-11357-01 - Cisco 512MB PC2-5300 DDR2-667MHz ECC Registered CL5 240-Pin DIMM Very Low Profile (VLP) Memory Module for 2900 / 3900 Router
SKU: 15-11357-01
Price: $195.16
15454DS312 - Cisco 15454 44.7Mb/s 10Base-T Multi-Mode 12 x Ports LC Connector SFP (mini-GBIC) Expansion Module
SKU: 15454DS312
Price: $109.75
15454-XC-10G - Cisco 15454 10Gb/s 10GBase-X 2 x Ports LC Connector Connect Card Expansion Module
SKU: 15454-XC-10G
Price: $163.74
15454-E100T-12 - Cisco Catalyst 3800 1Gb/s 1000Base-T Multi-Mode 12 x Ports Uplink RJ-45 Connector SFP(mini GBIC Ethernet Line Card
SKU: 15454-E100T-12
Price: $268.38
SM-ES3G-16-P - Cisco System PoE 15-Ports 15 x 10/100Base-TX + 1 x 10/100/1000Base-T Layer 3 Managed FastEthernet Network Switch
SKU: SM-ES3G-16-P
Price: $274.75
15454E-CTP-MIC48V - Cisco 2-Ports 10Base-T Serial Expansion Module
SKU: 15454E-CTP-MIC48V
Price: $553.34
74-10158-01 - Cisco UCS Dual-Port SAS Mezzanine RAID Controller for C240 M3 Rack Server
SKU: 74-10158-01
Price: $124.17
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.