Pitch and position count for the BOM fit
The 1744427-4 is a 4-position, single-row header on a 0.156" (3.96mm) pitch — a common footprint for low-circuit-count power distribution from a PCB to a cable harness. The 4-wall shrouding protects the square male pins from accidental bending during handling and mating. The friction lock fastening type holds the mating receptacle in place without a secondary latch — enough for moderate vibration in an industrial cabinet or lighting fixture, but not a high-shock environment that calls for a positive locking ramp.
Current rating varies by wire gauge — the crimp terminal and wire size determine ampacity. The 250VAC voltage rating and UL94 V-2 flammability cover lighting ballasts, small appliances, and general-purpose industrial control panels.