Replacement for SSR-550FX: Drop-In Alternatives We Stock
Looking for a replacement for the SSR-550FX (SSR-550FX Seasonic SSR-550FX FOCUS 550W 80 Plus Gold ATX12V Power Supply w/ Fully Modular)? Pro Disk Network ships 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 SSR-550FX
| SKU | SSR-550FX |
|---|---|
| Product | SSR-550FX Seasonic SSR-550FX FOCUS 550W 80 Plus Gold ATX12V Power Supply w/ Fully Modular |
| Current price | $444.57 |
| Stock status | In Stock |
| Detail page | View SSR-550FX › |
Drop-in replacements for SSR-550FX
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.
SSR-550FM - Seasonic SSR-550FM FOCUS 550W 80 PLUS Gold ATX12V Power Supply
SKU: SSR-550FM
Price: $344.84
SSR-650FM - Seasonic SSR-650FM FOCUS 650W 80 PLUS Gold ATX12V Power Supply
SKU: SSR-650FM
Price: $282.20
SSR-750FM - Seasonic SSR-750FM FOCUS 750W 80 PLUS Gold ATX12V Power Supply
SKU: SSR-750FM
Price: $447.63
SSR-550PD2 - Seasonic SSR-550PD2 PRIME Ultra Platinum 550W 80 Plus Platinum ATX12V Power Supply
SKU: SSR-550PD2
Price: $313.66
SSR-850FX - Seasonic FOCUS Plus 850 Gold 850W 80+ Gold ATX12V & EPS12V Full Modular FDB Fan Compact Power Supply
SKU: SSR-850FX
Price: $439.64
SSR-1000GD - Seasonic SSR-1000GD PRIME 1000W 80 PLUS Gold ATX12V Power Supply
SKU: SSR-1000GD
Price: $667.50
SSR-500GB3 - Seasonic S12III Series SSR-500GB3 500W 80 PLUS Bronze ATX12V Power Supply
SKU: SSR-500GB3
Price: $241.68
SSR-650GB3 - Seasonic S12III Series SSR-650GB3 650W 80 PLUS Bronze ATX12V Power Supply
SKU: SSR-650GB3
Price: $259.50
SSR-1300PD - Seasonic SSR-1300PD PRIME 1300W 80 PLUS Platinum ATX12V Power Supply
SKU: SSR-1300PD
Price: $667.30
SSR-650RM - Seasonic 650-Watts 80-Plus Gold ATX 12V/EPS 12V Power Supply
SKU: SSR-650RM
Price: $226.08
SSR-750RT - Seasonic 750-Watts 80-Plus Gold ATX 12V/EPS 12V Power Supply with Active PFC
SKU: SSR-750RT
Price: $229.57
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.