Replacement for CS-MARS-20-K9-RF: Drop-In Alternatives We Stock
Looking for a replacement for the CS-MARS-20-K9-RF (CS-MARS-20-K9-RF - Cisco MARS-20 Security Management System 2 x 10/100/1000Base-T LAN)? 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 CS-MARS-20-K9-RF
| SKU | CS-MARS-20-K9-RF |
|---|---|
| Product | CS-MARS-20-K9-RF - Cisco MARS-20 Security Management System 2 x 10/100/1000Base-T LAN |
| Stock status | In Stock |
| Detail page | View CS-MARS-20-K9-RF › |
Drop-in replacements for CS-MARS-20-K9-RF
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.
ASA5545-K9 - Cisco 8-Port 120/230V 1000Base-T Gigabit Ethernet Firewall Edition Security Appliance Rack-Mountable
SKU: ASA5545-K9
Price: $7,766.18
ASA5525-K9 - Cisco 8-Port 120/230V 1000Base-T Gigabit Ethernet Firewall Edition Security Appliance Rack-Mountable
SKU: ASA5525-K9
Price: $15,924.63
432904-001 - HP/Cisco Catalyst 3020 16-Ports 8 x 10/100/1000Base-T Gigabit LAN + 4 x SFP Layer-3 Managed Blade Switch Module
SKU: 432904-001
Price: $145.26
410916-B21 - HP/Cisco Catalyst 3020 8 x Ports 10/100/1000Base-T + 4 x SFP Layer-3 Managed Gigabit Ethernet Blade Switch
SKU: 410916-B21
Price: $145.26
AIR-AP1230B-A-K9 - Cisco Aironet 1200 1-Port 10/100 Wireless Access Point
SKU: AIR-AP1230B-A-K9
Price: $160.18
451439R-B21 - HP/Cisco Catalyst 3120X 4 x Ports 10/100/1000Base-T + 2 x SFP Gigabit Ethernet Blade Switch Module
SKU: 451439R-B21
Price: $189.47
410916R-B21 - HP/Cisco Catalyst 3020 8 x Ports 10/100/1000Base-T + 4 x SFP Layer-3 Managed Gigabit Ethernet Blade Switch
SKU: 410916R-B21
Price: $211.00
Cisco MEM-I/O-FLC20M 20MB Flash Memory Card for 7200- NPE 100 150 175 200 225 300
SKU: MEM-I-O-FLC20M
Price: $218.30
MS220-24P-HW - Cisco Smart Plus MS220-24P RJ-45 POE 24 x Ports 10/100/1000Base-T 4 x Expansion Slot Layer 3 Manage Rack-Mountable Gigabit Ethernet Switch
SKU: MS220-24P-HW
Price: $223.95
WS-X4920-GB-RJ45 - Cisco Catalyst 4900M 20-port 10/100/1000 Managed Module
SKU: WS-X4920-GB-RJ45
Price: $263.16
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.