Replacement for ST3450856S: Drop-In Alternatives We Stock
Looking for a replacement for the ST3450856S (ST3450856S - Seagate 450GB 15000RPM SAS 3Gb/s 3.5-inch Hard Drive)? Pro Disk Network ships Seagate 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 ST3450856S
| SKU | ST3450856S |
|---|---|
| Product | ST3450856S - Seagate 450GB 15000RPM SAS 3Gb/s 3.5-inch Hard Drive |
| Stock status | In Stock |
| Detail page | View ST3450856S › |
Drop-in replacements for ST3450856S
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.
9CL066-035 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3GB/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-035
Price: $128.42
9CL066-009 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-009
Price: $144.07
9CL066-007 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-007
Price: $144.07
ST3450856SS - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: ST3450856SS
Price: $145.26
9CL066-036 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-036
Price: $165.79
9CL066-038 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-038
Price: $175.51
9CL066-080 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-080
Price: $184.21
9CL066-057 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-057
Price: $184.21
9CL066-005 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-005
Price: $239.70
9CL066-006 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-006
Price: $250.53
9CL066-043 - Seagate Cheetah 15K.6 450GB 15000RPM SAS 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 9CL066-043
Price: $291.79
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.