Replacement for ST9402115AS: Drop-In Alternatives We Stock
Looking for a replacement for the ST9402115AS (ST9402115AS - Seagate LD25 40GB 2.5-inch Hard Drive SATA 1.5Gb/s 5400RPM 2MB Cache)? 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 ST9402115AS
| SKU | ST9402115AS |
|---|---|
| Product | ST9402115AS - Seagate LD25 40GB 2.5-inch Hard Drive SATA 1.5Gb/s 5400RPM 2MB Cache |
| Current price | $357.09 |
| Stock status | In Stock |
| Detail page | View ST9402115AS › |
Drop-in replacements for ST9402115AS
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.
ST940210AS - Seagate LD25.2 Series 40GB 5400RPM SATA 1.5Gb/s 2MB Cache 2.5-inch Hard Drive
SKU: ST940210AS
Price: $247.58
ST940210A - Seagate LD25.2 Series 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 2.5-inch Hard Drive
SKU: ST940210A
Price: $113.68
ST340019ACE - Seagate BarraCuda 5400.1 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 3.5-inch Hard Drive
SKU: ST340019ACE
Price: $119.08
ST340015A - Seagate BarraCuda 5400.1 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: ST340015A
Price: $143.39
ST9402115A - Seagate LD25 Series 40GB 5400RPM ATA-100 2MB Cache 2.5-inch Hard Drive
SKU: ST9402115A
Price: $146.97
ST340810A - Seagate 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 3.5-inch Hard Drive
SKU: ST340810A
Price: $155.79
9Y3001-006 - Seagate BarraCuda 5400.1 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9Y3001-006
Price: $165.79
9T7002-130 - Seagate U6 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: 9t7002-130
Price: $186.87
9Y3001-030 - Seagate BarraCuda 5400.1 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: 9y3001-030
Price: $189.47
9Y3001-040 - Seagate BarraCuda 5400.1 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9Y3001-040
Price: $205.26
9Y3001-031 - Seagate BarraCuda 5400.1 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: 9Y3001-031
Price: $211.58
9T7002-305 - Seagate U6 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 3.5-inch Hard Drive
SKU: 9T7002-305
Price: $211.97
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.