Replacement for 5406521: Drop-In Alternatives We Stock
Looking for a replacement for the 5406521 (540-6521 - Sun 250GB 7200RPM SATA 1.5Gb/s 8MB Cache 3.5-inch Hard Drive)? 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 5406521
| SKU | 5406521 |
|---|---|
| Product | 540-6521 - Sun 250GB 7200RPM SATA 1.5Gb/s 8MB Cache 3.5-inch Hard Drive |
| Stock status | In Stock |
| Detail page | View 5406521 › |
Drop-in replacements for 5406521
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.
540-6521-01 - Sun 250GB 7200RPM SATA 1.5GB/s 8MB Cache 3.5-inch Hard Drive
SKU: 540-6521-01
Price: $369.84
540-6596-01 - Sun 250GB 7200RPM SATA 1.5GB/s 8MB Cache 3.5-inch Hard Drive
SKU: 540-6596-01
Price: $328.58
540-6485 - Sun 250GB 7200RPM SATA 3Gbps 8MB Cache 3.5-inch Internal Hard Drive
SKU: 540-6485
Price: $369.84
540-7511-02 - Sun 250GB 7200RPM SATA 3Gb/s 8MB Cache 3.5-inch Hard Drive
SKU: 540-7511-02
Price: $406.46
RM1-6296-000 - HP Fuser Motor Assembly for LaserJet P3015 Series aka RM1-6521
SKU: RM1-6296-000
Price: $143.39
RM1-6296-000CN - HP Fuser Motor Assembly for LaserJet P3015 Series aka RM1-6521
SKU: RM1-6296-000CN
Price: $143.39
RM1-6296 - HP Fuser Motor Assembly for LaserJet P3015 Series aka RM1-6521
SKU: RM1-6296
Price: $143.39
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.