Replacement for A3643A: Drop-In Alternatives We Stock
Looking for a replacement for the A3643A (A3643A - HP 4GB Fast Wide SCSI-2 Hot-Pluggable Hard Drive)? 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 A3643A
| SKU | A3643A |
|---|---|
| Product | A3643A - HP 4GB Fast Wide SCSI-2 Hot-Pluggable Hard Drive |
| Current price | $459.66 |
| Stock status | In Stock |
| Detail page | View A3643A › |
Drop-in replacements for A3643A
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.
C3306A - HP 2.1GB 7200RPM Fast Wide SCSI Hot-Pluggable Single-Ended 50-Pin 3.5-inch Hard Drive
SKU: C3306A
Price: $77.12
FD-47148-01 - HP 2.1GB Fast Wide SCSI Hot-Pluggable 3.5-inch Hard Drive with Tray
SKU: FD-47148-01
Price: $150.41
FE-10574-01 - HP 9.1GB 7200RPM Fast Wide SCSI Single-Ended Hot-Pluggable 80-Pin 3.5-inch Hard Drive
SKU: FE-10574-01
Price: $170.00
C3306AR - HP 2.1GB 7200RPM Fast Wide SCSI Hot-Pluggable Single-Ended 50-Pin 3.5-inch Hard Drive
SKU: C3306AR
Price: $195.21
A3646-64001 - HP 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646-64001
Price: $232.82
A3646A - HP 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646A
Price: $233.68
A3646-69001 - HP 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646-69001
Price: $233.68
A3646-69003 - HP 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646-69003
Price: $296.30
A3646-67001 - HP 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646-67001
Price: $296.30
HP A3646A#ABA 4.3GB 7200RPM Fast Ultra Wide SCSI Hot-Pluggable 3.5-inch Hard Drive
SKU: A3646A-ABA
Price: $296.30
FE-06716-01 - HP 9.1GB 7200RPM Fast Wide SCSI Single-Ended Hot-Pluggable 80-Pin 3.5-inch Hard Drive
SKU: FE-06716-01
Price: $305.07
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.