Dell 400-AJSC (MVXPV) is a hot-swap hard drive for adding storage to supported server systems. It provides 600 GB capacity in a 2.5-inch drive format, with a SAS 12 Gb/s interface for connecting to a compatible storage backplane.
The spindle speed is 15,000 rpm, a specification suited to server storage tasks that benefit from fast disk access. The listing says it fits 2.5-inch or 3.5-inch bays when used with the included bay adapter.
Compatibility listed for this drive includes Dell PowerEdge R230, R330, R430, R530, R630, R730, R730xd, T330, T430, T630 and T440; Dell EMC PowerEdge T640; and PowerVault MD1400.