What the ratings mean for the fit
The 395430015: The 15-position count is the key BOM parameter — confirm the panel or PCB layout calls for exactly 15 circuits at this pitch. The side-entry horizontal orientation means wire entry is parallel to the board plane; verify the enclosure wire-entry port is on the correct face before committing.
Against the 39544 sibling: 10 A, not 15 A
The 15-circuit count of the 395430015 against the 8-circuit and 5-circuit peers in the 39544 series makes it the highest-density option within the same family footprint — the position count difference is the primary reason a buyer picks this over its siblings.