Western Digital

WD400JB-00JJC0, DCM HSCHNTJAHN, Western Digital 40GB IDE 3.5 Hard Drive

Name: WD400JB-00JJC0, DCM HSCHNTJAHN, Western Digital 40GB IDE 3.5 Hard Drive
Brand: Western Digital
SKU: B00MBMVJKA

Bottom line: The Western Digital WD400JB-00JJC0 is a specs-and-price decision rather than a crowd-consensus one in the drives & media category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-20

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ See full specs below in description

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

HDD #1 Specs:SN: WCAMA5058318Model: WD400JB-00JJC0Date: 04 SEP 2011DCM: HSCHNTJAHNProduct of: ThailandPCB Sticker: 2061-701292-A00 BAPWB: 2060-701292-002 REV AMicro Jogs------------------------------LH : PH : Micro Jog (Hex/Dec)------------------------------0 : 0 : 4BC/1212ROM F/W version......................... : 0894CPreamp vendor........................... : 0x0001Preamp revision......................... : 0x0004SKU: 20058The item included is exactly what is on the picture. Picture is not a stock photo; it is the picture of an actual item sold. If item description and the picture vary…

SpecPicks Verdict

SpecPicks scored Western Digital WD400JB-00JJC0 using a rating × review-volume × price-fit model applied to published specs and reviews across the drives & media category. Western Digital's drives & media lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for drives & media of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

See full specs below in description

Full Specifications

Brand	Western Digital
Model Number	WD400JB-00JJC0
Hard Disk Size	40 GB
Hard-Drive Size	40 GB
Mfr Part Number	WD400JB-00JJC0
Special Feature	Portable
Installation Type	Internal Hard Drive
Additional Features	Portable
Hard Disk Interface	IDE
Hard Disk Description	Ide
Hard Disk Form Factor	3.5 inches
Hardware Connectivity	IDE
Connectivity Technology	SATA
Digital Storage Capacity	40 GB

Ready to buy?

WD400JB-00JJC0, DCM HSCHNTJAHN, Western Digital 40GB IDE 3.5 Hard Drive is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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