Replacement for ASA5520: Drop-In Alternatives We Stock
Looking for a replacement for the ASA5520 (ASA5520 - Cisco ASA 5520 Adaptive Security Appliance)? 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 ASA5520
| SKU | ASA5520 |
|---|---|
| Product | ASA5520 - Cisco ASA 5520 Adaptive Security Appliance |
| Current price | $420.00 |
| Stock status | In Stock |
| Detail page | View ASA5520 › |
Drop-in replacements for ASA5520
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.
ASA5505-CF-128MB - Cisco 128MB CompactFlash (CF) Memory Card for Adaptive Security Appliance(ASA) 5500 Series
SKU: ASA5505-CF-128MB
Price: $116.33
ASA5505-CF-512MB - Cisco 512MB CompactFlash (CF) Memory Card for Adaptive Security Appliance(ASA) 5500 Series
SKU: ASA5505-CF-512MB
Price: $116.33
ASA5500-CF-128MB - Cisco 128MB CompactFlash (CF) Memory Card for Adaptive Security Appliance(ASA) 5500 Series
SKU: ASA5500-CF-128MB
Price: $116.33
ASA5500-CF-1GB - Cisco 1GB CompactFlash (CF) Memory Card for Adaptive Security Appliance(ASA) 5500 Series
SKU: ASA5500-CF-1GB
Price: $135.84
74-4966-01 - HP / Cisco Asa5580 4 X AMD Opteron 8218 2.6GHz 12GB RAM Adaptive Security Appliance
SKU: 74-4966-01
Price: $12,479.39
74-4967-01 - HP / Cisco Asa5580 2 X AMD Opteron 8218 2.6GHz 8GB RAM Adaptive Security Appliance
SKU: 74-4967-01
Price: $12,479.39
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.