Replacement for K3963: Drop-In Alternatives We Stock
Looking for a replacement for the K3963 (K3963 - Dell 40GB 7200RPM ATA-100 2MB Cache 3.5-inch Hard Drive)? Pro Disk Network ships Dell 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 K3963
| SKU | K3963 |
|---|---|
| Product | K3963 - Dell 40GB 7200RPM ATA-100 2MB Cache 3.5-inch Hard Drive |
| Current price | $205.26 |
| Stock status | In Stock |
| Detail page | View K3963 › |
Drop-in replacements for K3963
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.
0C142 - Dell 40GB 7200RPM ATA/IDE UD100 2MB Cache 3.5ICNH Low Profile (1.0inch) Hard Drive
SKU: 0C142
Price: $159.57
00C142 - Dell 40GB 7200RPM ATA/IDE UD100 2MB Cache 3.5ICNH Low Profile (1.0inch) Hard Drive
SKU: 00C142
Price: $159.57
02W649 - Dell 40GB 7200RPM 2MB Cache ATA/IDE-133 3.5-inch (ULTRA) Hard Drive
SKU: 02W649
Price: $235.79
340-2966 - Dell 80GB 7200RPM IDE ATA-100 2MB Cache 3.5-inch Hard Disk Drive
SKU: 340-2966
Price: $94.55
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.