Ratings and what they mean
The 395443009: The 15 A rating is per circuit — the limiting factor for dense multi-circuit layouts is the current-per-contact figure, not the total bus capacity. The 300 V rating covers the standard industrial distribution range.
Where this class is used
The Eurostyle ESE 39544 series targets wire-to-board power and signal distribution in industrial automation, machine control panels, and instrumentation. The through-hole mount and single-level configuration make it a front-runner for PCB edge termination where panel wiring lands on a PLC or I/O module — the 9-circuit count covers the mid-density end of that application range.