Replacement for 304002-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 304002-B21 (304002-B21 - HP 256MB Kit (2 X 128MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory)? Pro Disk Network ships HP 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 304002-B21
| SKU | 304002-B21 |
|---|---|
| Product | 304002-B21 - HP 256MB Kit (2 X 128MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory |
| Current price | $279.49 |
| Stock status | In Stock |
| Detail page | View 304002-B21 › |
Drop-in replacements for 304002-B21
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.
300678-B21 - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory for ProLiant Servers
SKU: 300678-B21
Price: $71.58
TS512MHP8086 - Transcend 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory
SKU: TS512MHP8086
Price: $188.16
300678-FRE - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: 300678-FRE
Price: $260.53
300678-CL1 - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: 300678-CL1
Price: $260.53
A7840A - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: A7840A
Price: $260.53
A7840AR - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory
SKU: A7840AR
Price: $260.53
A8086AR - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory for Workstation ZX2000
SKU: A8086AR
Price: $279.49
A9772AR - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL25 184-Pin DIMM Dual Rank Memory
SKU: A9772AR
Price: $279.49
AB221A - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: AB221A
Price: $279.49
A8086A - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: A8086A
Price: $279.49
A9772A - HP 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: A9772A
Price: $279.49
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.