Compiled specifications
| Parameter | Value |
|---|---|
| Part number | WD40EZZX |
| Density / capacity | 4TB |
| Speed / grade | SATA 6 Gb/s |
| Product line | WD Blue 3.5-inch PC HDD |
| Lifecycle | — |
Blank rows are omitted rather than filled with a guess.
The WD40EZZX is a 3.5-inch SATA hard drive in Western Digital’s WD Blue PC-storage line, with a formatted capacity of 4TB, a 5400 RPM spindle speed and CMR recording over a SATA 6 Gb/s interface.
Key figures
- Formatted capacity: 4TB.
- Form factor: 3.5-inch; interface: SATA 6 Gb/s.
- Spindle speed: 5400 RPM; recording technology: CMR.
- NoTouch ramp-load technology; 2-year limited warranty.
What this document does and does not state
WD40EZZX is a single orderable part number within the WD Blue family. The data sheet lists several WD Blue capacities and model codes as separate orderable part numbers; figures shown here are for this one code only. The data sheet publishes no operating-temperature grade or qualification standard for this line, and no lifecycle status, so those are intentionally not asserted.
Data source
Figures are taken from the manufacturer data sheet WD Blue 3.5-inch SATA PC HDD — Western Digital Data Sheet (©2025 Western Digital Corporation), md5 bf051cc0f3f23cba58d3e210201a2785. This is a manufacturer data-sheet copy, so no public datasheet link is claimed and the external reference points to the manufacturer product page.
Who makes it
The WD40EZZX is made by Western Digital Corporation, a United States–headquartered data storage company based in San Jose, California. © 2025 Western Digital Corporation or its affiliates.
Cross-references & alternatives
A cross-reference here would change what a customer buys. We publish one only when each row carries a source and a date and has been checked by a named reviewer.
- Table shape: Alternative · Fit · Differs in · Source · Checked
- Blocked on: an engineering review step with a named reviewer per row
Official documentation
MemSignal does not host, reproduce or distribute datasheets. Where the manufacturer publishes one, we link to it.
Provenance
- Source: WD Blue 3.5-inch SATA PC HDD — Western Digital Data Sheet (©2025 Western Digital Corporation), md5 bf051cc0f3f23cba58d3e210201a2785
- Checked: 2026-10-27
Cross-reference and substitution advice appear only where each claim carries a source and a date.
Parameters not compiled for this part
- Supply voltage
- Operating temperature
- Typical applications
- Country of origin
Listed so the gap is visible on the page, not inferred later.
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