Replacement for 647895-B21N: Drop-In Alternatives We Stock
Looking for a replacement for the 647895-B21N (647895-B21N - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module)? 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 647895-B21N
| SKU | 647895-B21N |
|---|---|
| Product | 647895-B21N - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module |
| Current price | $87.46 |
| Stock status | In Stock |
| Detail page | View 647895-B21N › |
Drop-in replacements for 647895-B21N
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.
647895-TV1 - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647895-TV1
Price: $87.46
647895-S21 - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647895-S21
Price: $145.26
647895-B21 - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647895-B21
Price: $145.26
HP 647895-B21#ABA 4GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647895-B21-ABA
Price: $87.46
HP 647895-B21#0D1 4GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647895-B21-0D1
Price: $87.46
647895-B212 - HP 4GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647895-B212
Price: $87.46
A2Z49AA - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: A2Z49AA
Price: $71.58
682416-001 - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 682416-001
Price: $71.58
647648-571 - HP 4GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647648-571
Price: $71.58
735173-001 - HP 4GB DDR3-1600MHz PC-12800 ECC Registered CL11 240-Pin DIMM Memory Module
SKU: 735173-001
Price: $87.46
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.