Replacement for ST3100520AS: Drop-In Alternatives We Stock
Looking for a replacement for the ST3100520AS (ST3100520AS - Seagate BarraCuda Green 1TB 5900RPM SATA 3Gb/s 32MB Cache 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 ST3100520AS
| SKU | ST3100520AS |
|---|---|
| Product | ST3100520AS - Seagate BarraCuda Green 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive |
| Current price | $320.14 |
| Stock status | In Stock |
| Detail page | View ST3100520AS › |
Drop-in replacements for ST3100520AS
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.
9TT153-301 - Seagate BarraCuda Green 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TT153-301
Price: $489.37
ST1000DL002 - Seagate BarraCuda Green 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: ST1000DL002
Price: $503.09
9TN15R-568 - Seagate BarraCuda Green 1.5TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN15R-568
Price: $232.82
9JB1AU-572 - Seagate BarraCuda Green 1.5TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9JB1AU-572
Price: $373.21
9JB1AU-571 - Seagate BarraCuda Green 1.5TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9JB1AU-571
Price: $373.21
9TN15R-510 - Seagate BarraCuda Green 1.5TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN15R-510
Price: $476.45
9TN15R-301 - Seagate BarraCuda Green 1.5TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN15R-301
Price: $565.32
9TN154-541 - Seagate BarraCuda LP 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN154-541
Price: $192.08
9TN154-510 - Seagate BarraCuda LP 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN154-510
Price: $315.66
ST31000520AS - Seagate BarraCuda LP 1TB 5900RPM SATA 3Gb/s Cche 32MB Cache 3.5-inch Hard Drive
SKU: ST31000520AS
Price: $339.54
9TN154-410 - Seagate BarraCuda LP 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN154-410
Price: $361.47
9TN154-301 - Seagate BarraCuda LP 1TB 5900RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 9TN154-301
Price: $438.16
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.