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400ATJJ ✓ Verified by PartsTable
DELL · STORAGE_HDD · 2.5_SAS_HDD
WHAT YOU NEED TO KNOW
SAS HDD backplane accepts SATA drives, SATA backplane does NOT accept SAS 2.5" SAS HDDs come with or without carrier/tray — ALWAYS ASK
ALWAYS confirm carrier/tray PN — server-specific trays vary by generation
PRODUCT OVERVIEW

Increase the storage capacity of your system with the 1TB Hard Drive from Dell. Key specifications include Type: HDD, HDD size: 3.5", Hot-swap: Yes, HDD speed: 7200 RPM, Interface: Serial ATA III, HDD capacity: 1 TB. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
STORAGE_HDD→ 2.5_SAS_HDD→ 400ATJJ
SPECIFICATIONS
TypeHDD
HDD size3.5"
Hot-swapYes
HDD speed7200 RPM
InterfaceSerial ATA III
HDD capacity1 TB
Component forServer/workstation
Bytes per sector512n
Operating voltage5 / 12 V
Compatible productsDell EMC PowerEdge C6420 (3.5"), R640 (3.5"), R740 (3.5"), R740xd (3.5")
HDD interface transfer rate6 Gbit/s
Harmonized System (HS) code84717050
COMPONENT DIAGRAM
LABEL P/N S/N HDD SAS 12Gb/s 69.85 mm (2.75") 100.0 mm 2.5" HDD — MECHANICAL Spinning disk, hot-swap SAS 12Gb/s — Dual-port 7200 / 10K / 15K RPM FORM FACTOR — 2.5" Hot-swap, carrier-specific MOUNTING — 4x M3 bottom Standard SFF screw pattern TITLE HDD DRIVE PN 400ATJJ MFR DELL 400-ATJJ
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
400-ATJKCompatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
compatible
400-AUMZCompatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
compatible
400-AVESCompatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - SPN - Gen 14
compatible
9Y8P6Compatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - MPN - Gen 14
compatible
FCFYYCompatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - MPN - Gen 14
compatible
TRGJPCompatible
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - MPN - Gen 14
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 8
9Y8P6SUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
FCFYYSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
TRGJPSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
V8WG4SUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
400-ATJKSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
400-AUMZSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
400-AUNCSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
400-AVESSUBSTITUTE
Dell 1Tb SATA 6G 7.2K LFF HDD R/T-Series Tray - DPN - Gen 14
DELL
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FREQUENTLY ASKED QUESTIONS
What is 400ATJJ?
400ATJJ is a 400-ATJJ manufactured by DELL. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace 400ATJJ?
There are 12 known substitutes for 400ATJJ: 400-ATJK, 400-AUMZ, 400-AVES and 9 more. Substitute compatibility should be verified for your specific system.
Is 400ATJJ still available?
400ATJJ is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026