Replacement for CISCO3825-SEC-K9: Drop-In Alternatives We Stock
Looking for a replacement for the CISCO3825-SEC-K9 (Cisco CISCO3825-SEC/K9 3825 10/100/1000base-T Gigabit Ethernet Integrated Service Router)? 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 CISCO3825-SEC-K9
| SKU | CISCO3825-SEC-K9 |
|---|---|
| Product | Cisco CISCO3825-SEC/K9 3825 10/100/1000base-T Gigabit Ethernet Integrated Service Router |
| Stock status | In Stock |
| Detail page | View CISCO3825-SEC-K9 › |
Drop-in replacements for CISCO3825-SEC-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.
Cisco ISR4321-SEC/K9 ISR 2-Port 4-Slot 10/100/1000Base-T Gigabit Ethernet Integrated Service Router
SKU: ISR4321-SEC-K9
Price: $404.22
WS-C3560CG-8PC-S - Cisco Catalyst PoE RJ-45 8 x Ports 10/100/1000Base-TX + 2 x combo Gigabit SFP Gigabit SFP managed desktop Gigabit Ethernet Switch
SKU: WS-C3560CG-8PC-S
Price: $3,642.95
Cisco ISR4351-SEC/K9 ISR 4351 3-Port 10-Slot 10/100Base-T Gigabit Ethernet Security Bundle Router
SKU: ISR4351-SEC-K9
Price: $6,798.59
Cisco CISCO1941W-A/K9 230V 10/100/1000Base-T Gigabit Ethernet Integrated Router
SKU: CISCO1941W-A-K9
Price: $259.50
CISCO878-SEC-K9 - Cisco 878 G.SHDSL 4 x 10/100Base-TX LAN + 1 x WAN + 1 x ISDN BRI (S/T) WAN Integrated Services Router
SKU: CISCO878-SEC-K9
Price: $250.53
WS-C2960X-24PSL-RF - Cisco Catalyst 2960-X Series PoE 24 x Ports 10/100/1000Base-T + 4 x Gigabit SFP Layer 2 Managed 1U Rack-Mountable Gigabit Ethernet Network Switch
SKU: WS-C2960X-24PSL-RF
Price: $130.26
WS-C2960X-24PS-L - Cisco Catalyst 2960-X Series PoE 24 x Ports 10/100/1000Base-T + 4 x Gigabit SFP Layer 2 Managed 1U Rack-Mountable Gigabit Ethernet Network Switch
SKU: WS-C2960X-24PS-L
Price: $142.84
WS-C2960X-24TS-L - Cisco Catalyst 2960-X Series 24 x Ports 10/100/1000Base-T + 2 x Gigabit SFP Layer 2 Managed 1U Rack-Mountable Gigabit Ethernet Network Switch
SKU: WS-C2960X-24TS-L
Price: $156.58
WS-C2960X-48TS-LL - Cisco Catalyst 2960-X 48 x Ports 10/100/1000Base-T + 4 x Gigabit SFP Layer 2 Managed Rack-mountable 1U Gigabit Ethernet Network Switch
SKU: WS-C2960X-48TS-LL
Price: $188.84
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.