Replacement for E400EM21U-02: Drop-In Alternatives We Stock
Looking for a replacement for the E400EM21U-02 (E400EM21U-02 - Fujitsu 4GB Cache Memory 2X 1Gb X 2Cm E4Km400)? 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 E400EM21U-02
| SKU | E400EM21U-02 |
|---|---|
| Product | E400EM21U-02 - Fujitsu 4GB Cache Memory 2X 1Gb X 2Cm E4Km400 |
| Current price | $218.11 |
| Stock status | In Stock |
| Detail page | View E400EM21U-02 › |
Drop-in replacements for E400EM21U-02
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.
CA06102-B26300DL - Fujitsu Enterprise 18.4GB 15000RPM Ultra-160 SCSI 68-Pin 8MB Cache 3.5-inch Hard Drive
SKU: CA06102-B26300DL
Price: $232.82
CA06102-B40560HB - Fujitsu Enterprise 36.4GB 15000RPM Ultra-160 SCSI 80-Pin Hot-Pluggable 8MB Cache 3.5-inch Hard Disk Drive
SKU: CA06102-B40560HB
Price: $237.53
CA06102-B20100DC - Fujitsu Enterprise 18.4GB 15000RPM Ultra-160 SCSI 80-Pin 8MB Cache 3.5-inch Hard Drive
SKU: CA06102-B20100DC
Price: $311.66
CT901020 - Crucial 2GB Kit (2 x 1GB) DDR-400 MHz PC3200 non-ECC Unbuffered CL3 180-Pin DIMM Memory Upgrade for Fujitsu Esprimo P5600 System
SKU: CT901020
Price: $317.96
CA01602-B45100VD - Fujitsu 4GB 5400RPM ATA-33 3.5-inch Hard Drive
SKU: CA01602-B45100VD
Price: $122.51
CA01602-B45100UD - Fujitsu 4GB 5400RPM ATA-33 3.5-inch Hard Drive
SKU: CA01602-B45100UD
Price: $122.51
CA0660-E323-02 - Fujitsu Hard Drive - 146GB - Hot-Swap - 3.5-inch - 4Gb Fibre Channel - 15000RPM
SKU: CA0660-E323-02
Price: $128.47
LPE11002-M4 - Fujitsu LightPulse 2-Port 4GB/s Fibre Channel PCI-Express x 4 Host Bus Adapter
SKU: LPE11002-M4
Price: $128.95
CA01602-B82500UU - Fujitsu 4GB 5400RPM ATA-33 3.5-inch Hard Drive
SKU: CA01602-B82500UU
Price: $133.00
CA01602-B98900PU - Fujitsu 4GB 5400RPM ATA-33 3.5-inch Hard Drive
SKU: CA01602-B98900PU
Price: $133.00
CA05177-B902000A - Fujitsu 4GB 5400RPM ATA-33 3.5-inch Hard Drive
SKU: CA05177-B902000A
Price: $143.29
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.