Alternative to 9R4003-504: Better-Value Equivalents in Stock
Comparing the 9R4003-504 (9R4003-504 - Seagate U5 Series 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 512KB Cache (CE) 3.5-inch Hard Drive) against alternatives? Pro Disk Network stocks 12 similar Seagate parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the 9R4003-504
| SKU | 9R4003-504 |
|---|---|
| Product | 9R4003-504 - Seagate U5 Series 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 512KB Cache (CE) 3.5-inch Hard Drive |
| Current price | $392.99 |
| Stock status | In Stock |
| Detail page | View 9R4003-504 › |
Alternatives to 9R4003-504
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.
9R4005-504 - Seagate U5 Series 10GB 5400RPM IDE Ultra ATA/100 (ATA-6) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9R4005-504
Price: $95.08
9W3883-504 - Seagate Momentus 5400.2 80GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 2.5-inch Hard Drive
SKU: 9W3883-504
Price: $157.88
9W3234-504 - Seagate Momentus 5400.2 100GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: 9W3234-504
Price: $229.00
9W3237-504 - Seagate Momentus 5400.2 60GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: 9W3237-504
Price: $382.59
9AN510-504 - Seagate ST1.2 Series 4GB 3600RPM IDE Ultra ATA/33 (ATA-4) 2MB Cache Flex 1-inch Module
SKU: 9AN510-504
Price: $129.58
9R5004-001 - Seagate U10 Series 20GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9R5004-001
Price: $147.37
9T7001-804 - Seagate U6 Series 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9T7001-804
Price: $149.00
9R4003-105 - Seagate U5 Series 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9R4003-105
Price: $151.63
9W1021-391 - Seagate U Series X 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9W1021-391
Price: $154.61
9R5004-030 - Seagate U10 Series 20GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9R5004-030
Price: $157.00
9W1021-009 - Seagate U Series X 20GB 5400RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9W1021-009
Price: $192.51
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.