What this 8-position vertical header does in a terminal block layout
The 284519-8 is an 8-position, single-level shrouded header from TE's Buchanan series, pitched at 0.150" (3.81mm) and mounted vertically through the board. The green polyamide housing (UL94 V-0) and the mating flange on both ends mean it locks into the matching plug and won't shake loose in a panel or cabinet with vibration.
At 3.81mm pitch, the 8 positions fit in a board footprint about 30.5mm wide — tight enough for dense terminal blocks but with enough spacing to route traces between pins without a fine-line board. The 0.134" (3.40mm) solder tail length suits standard 1.6mm PCBs — the pin protrudes enough for a solid fillet without bottoming out on the solder wave.