Replacement for PWR-2921-51-DC: Drop-In Alternatives We Stock
Looking for a replacement for the PWR-2921-51-DC (PWR-2921-51-DC - Cisco Power Supply for 2921 / 2951 Series 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 PWR-2921-51-DC
| SKU | PWR-2921-51-DC |
|---|---|
| Product | PWR-2921-51-DC - Cisco Power Supply for 2921 / 2951 Series Router |
| Current price | $1,229.05 |
| Stock status | In Stock |
| Detail page | View PWR-2921-51-DC › |
Drop-in replacements for PWR-2921-51-DC
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.
PWR-2921-51-POE - Cisco AC Power Supply with PoE Cisco 2921 / 2951 Integrated Services Router
SKU: PWR-2921-51-POE
Price: $683.88
RPS-ADPTR-2921-51 - Cisco RPS Adapter for 2921 / 2951 Series Router
SKU: RPS-ADPTR-2921-51
Price: $301.16
341-0228 - Cisco Internal DC Power Supply for 2921 / 2951 Series Router
SKU: 341-0228
Price: $2,597.63
PWR-2821-51-AC-IP - Cisco PoE Power Supply for Cisco 2821 / 2851 Routers
SKU: PWR-2821-51-AC-IP
Price: $400.45
Cisco PWR-4450-DC Redundant internal Power Supply For Cisco 4451x Integrated Spare
SKU: PWR-4450-DC
Price: $1,715.58
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
Cisco PWR-C45-1300ACV/2 1300-Watts Power Supply for Catalyst 4503 / 4506 / 4507R / 4510R
SKU: PWR-C45-1300ACV-2
Price: $1,649.75
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.