Replacement for SG500-28P-K9: Drop-In Alternatives We Stock
Looking for a replacement for the SG500-28P-K9 (SG500-28P-K9 - Cisco Small Business 500 RJ-45 PoE 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 SG500-28P-K9
| SKU | SG500-28P-K9 |
|---|---|
| Product | SG500-28P-K9 - Cisco Small Business 500 RJ-45 PoE 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 SG500-28P-K9 › |
Drop-in replacements for SG500-28P-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.
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
MEM3745-64U128CF - Cisco 64MB CompactFlash (CF) Memory Card for Cisco 3745 Router
SKU: MEM3745-64U128CF
Price: $116.33
CAB-AC-2800W-INT - Cisco 10ft AC Power Cord for Cisco Catalyst 4500 Series Switch
SKU: CAB-AC-2800W-INT
Price: $147.86
MEM3745-128CF-MT - Transcend 128MB CompactFlash (CF) Memory Card for Cisco 3745 Router
SKU: MEM3745-128CF-MT
Price: $83.88
CAB-AC-2800W-EU - Cisco 3m 250V Power Cord for Catalyst 4503 / 4506 / 4507R
SKU: CAB-AC-2800W-EU
Price: $85.82
MEM3745-32U128CF - Cisco 128MB Flash Memory Card for 3725 / 3745 Router
SKU: MEM3745-32U128CF
Price: $116.33
MEM3745128CFAPP - Cisco 128MB CompactFlash Memory Card for 3700 Series
SKU: MEM3745128CFAPP
Price: $116.33
MEM3745-64U128CF-APP - Cisco 128MB CompactFlash (CF) Memory Card for 3700 Router Series
SKU: MEM3745-64U128CF-APP
Price: $116.33
MEM3745-32U128CF-APP - Cisco 128MB CompactFlash (CF) Memory Card for 3700 Router Series
SKU: MEM3745-32U128CF-APP
Price: $116.33
MEM3745-128CF-TP - Cisco 128MB CompactFlash (CF) Memory Card for 3700 Router Series
SKU: MEM3745-128CF-TP
Price: $116.33
MEM-C4K-CPTFL128M - Cisco 128MB Flash Memory Card for Catalyst 4000/4500 Series
SKU: MEM-C4K-CPTFL128M
Price: $116.33
2-409-774-12 - Cisco 2800-Watts 200-240V Power Supply For Catalyst 4500 Series Switch
SKU: 2-409-774-12
Price: $121.30
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.