Housing Selection for the Dynamic D-3200 Line
The 5.08mm pitch and 7.62mm row spacing give enough creepage for the voltage levels typical of this class — the housing itself doesn't carry a current rating, that's set by the crimp terminals you insert.
What the 5.08mm Pitch and Polarizing Key Mean for Panel Wiring
The polarizing key on the plug housing aligns with a corresponding slot in the mating receptacle, so you can't cross-wire adjacent connectors in a dense panel. The panel mount feature means the housing snaps into a cutout rather than floating on the wire harness, which keeps the mating interface stable under vibration.
Contacts Not Included — Ordering the Crimp Terminals Separately
The 3-179555-3 is listed as Active and RoHS compliant. The Bulk packaging suits panel-build quantities where tape-and-reel isn't needed.