Replacement for KFJ-E50A-4G: Drop-In Alternatives We Stock
Looking for a replacement for the KFJ-E50A-4G (Kingston KFJ-E50A/4G 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Unbuffered CL5 240-Pin DIMM Dual Rank Memory)? Pro Disk Network ships Kingston 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 KFJ-E50A-4G
| SKU | KFJ-E50A-4G |
|---|---|
| Product | Kingston KFJ-E50A/4G 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Unbuffered CL5 240-Pin DIMM Dual Rank Memory |
| Current price | $165.55 |
| Stock status | In Stock |
| Detail page | View KFJ-E50A-4G › |
Drop-in replacements for KFJ-E50A-4G
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.
Kingston KFJ-BX667K2/4G 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory
SKU: KFJ-BX667K2-4G
Price: $155.68
Kingston Technology KFJ-BX667LPK2/4G 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 Fully Buffered CL5 240-Pin DIMM 1.8V Memory
SKU: KFJ-BX667LPK2-4G
Price: $173.49
Kingston KFJ-BX667K2/8G 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Quad Rank Memory
SKU: KFJ-BX667K2-8G
Price: $161.87
Kingston KFJ-E50A/8G 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 ECC Unbuffered CL5 240-Pin DIMM Dual Rank Memory
SKU: KFJ-E50A-8G
Price: $361.05
Kingston KFJ-BX533K2/4G 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Fully Buffered CL4 240-Pin DIMM Memory
SKU: KFJ-BX533K2-4G
Price: $155.68
Kingston KFJ-RX200/4G 4GB Kit (2 X 2GB) DDR2-400MHz PC2-3200 ECC Registered CL3 240-Pin DIMM Memory
SKU: KFJ-RX200-4G
Price: $173.49
Kingston KFJ-E50/4G 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Unbuffered CL4 240-Pin DIMM Memory
SKU: KFJ-E50-4G
Price: $176.59
Kingston KFJ-RX200SR/4G 4GB Kit (2 X 2GB) DDR2-400MHz PC2-3200 ECC Registered CL3 240-Pin DIMM Single Rank Memory
SKU: KFJ-RX200SR-4G
Price: $236.01
Kingston KFJ-TX120/4G 4GB DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM Dual Rank x8 Memory Module
SKU: KFJ-TX120-4G
Price: $129.54
Kingston KFJ-BX533K2/8G 8GB Kit (2 X 4GB) DDR2-533MHz PC2-4200 ECC Fully Buffered CL4 240-Pin DIMM Memory
SKU: KFJ-BX533K2-8G
Price: $172.91
Kingston KTS8122K2/4G 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM Memory (Kit of 2 )
SKU: KTS8122K2-4G
Price: $139.99
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.