Replacement for SG500-28-K9-NA: Drop-In Alternatives We Stock
Looking for a replacement for the SG500-28-K9-NA (SG500-28-K9-NA - Cisco Small Business 500 RJ-45 28 x Ports 10/100/1000Base-T + 2 x SFP Expension Slot Layer 3 Managed Giagabit Ethernet Switch)? 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 SG500-28-K9-NA
| SKU | SG500-28-K9-NA |
|---|---|
| Product | SG500-28-K9-NA - Cisco Small Business 500 RJ-45 28 x Ports 10/100/1000Base-T + 2 x SFP Expension Slot Layer 3 Managed Giagabit Ethernet Switch |
| Stock status | In Stock |
| Detail page | View SG500-28-K9-NA › |
Drop-in replacements for SG500-28-K9-NA
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.
SG300-28P - Cisco Small Business 300 Series RJ-45 PoE+ 28 x Ports 10/100/1000Base-T + 2 x combo Gigabit SFP Layer 3 Managed Desktop Rack Mountable 1U Gigabit Ethernet Switch
SKU: SG300-28P
Price: $869.47
CAB-AC-2800W-INT - Cisco 10ft AC Power Cord for Cisco Catalyst 4500 Series Switch
SKU: CAB-AC-2800W-INT
Price: $147.86
PWR-C45-2800ACV-2 - Cisco 2800-Watts 200-240V Power Supply for Catalyst 4503-E / 4506-E / 4507R-E / 4510R-E / 4507R+E / 4510R+E
SKU: PWR-C45-2800ACV-2
Price: $127.83
378928-B21 - HP Cisco 1Gb/s 1000Base-T Copper 100m RJ45 Connector SFP Transceiver Module
SKU: 378928-B21
Price: $160.00
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.