Replacement for ST940818SM: Drop-In Alternatives We Stock
Looking for a replacement for the ST940818SM (ST940818SM - Seagate EE25 40GB 2.5-inch Hard Drive SATA 5400RPM 8MB 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 ST940818SM
| SKU | ST940818SM |
|---|---|
| Product | ST940818SM - Seagate EE25 40GB 2.5-inch Hard Drive SATA 5400RPM 8MB Cache |
| Current price | $235.79 |
| Stock status | In Stock |
| Detail page | View ST940818SM › |
Drop-in replacements for ST940818SM
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.
ST940817SM - Seagate EE25 40GB 5400RPM SATA 3Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: ST940817SM
Price: $110.53
ST940814AS - Seagate Momentus 5400.3 40GB 5400RPM SATA 1.5Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: ST940814AS
Price: $140.00
ST9402116SB - Seagate Momentus 5400.3 40GB 5400RPM SATA 1.5Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: ST9402116SB
Price: $158.00
ST94813AS - Seagate Momentus 5400.2 40GB 5400RPM SATA 1.5Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: ST94813AS
Price: $344.33
9DH131-750 - Seagate 40GB 5400RPM SATA 3Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: 9DH131-750
Price: $480.21
ST940814SM - Seagate EE25.1 40GB 2.5-inch Hard Drive SATA 1.5Gb/s 5400RPM 8MB Cache
SKU: ST940814SM
Price: $500.54
ST940814SM - Seagate EE25.1 40GB 2.5-inch Hard Drive SATA 1.5Gb/s 5400RPM 8MB Cache
SKU: ST940814SM
Price: $500.54
ST9408114A - Seagate Momentus 40GB 5400RPM ATA-100 8MB Cache 2.5-inch Hard Drive
SKU: ST9408114A
Price: $160.55
9W3232-030 - Seagate Momentus 5400.2 40GB 5400RPM ATA-100 8MB Cache 2.5-inch Hard Drive
SKU: 9W3232-030
Price: $226.08
9Y1082-301 - Seagate Momentus 40GB 5400RPM ATA-100 8MB Cache 2.5-inch Hard Drive
SKU: 9Y1082-301
Price: $237.49
9W3232-020 - Seagate Momentus 5400.2 40GB 5400RPM ATA-100 8MB Cache 2.5-inch Hard Drive
SKU: 9W3232-020
Price: $273.91
ST94813A - Seagate Momentus 5400.2 40GB 5400RPM ATA-100 8MB Cache 2.5-inch Hard Drive
SKU: ST94813A
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.