Pitch, Positions, and the Sparse Pinout
The 6-176976-1: With 3 positions but only 2 loaded, the empty cavity acts as a mechanical key or a spare for future circuit revision; confirm the mating receptacle's position count matches this sparse layout before committing the BOM.
What the Locking Ramp Buys in the Field
The locking ramp fastening type keeps the mated pair engaged under vibration — in a power header, a loose joint runs hot, and the ramp latch prevents that fretting failure without secondary hardware. Shrouded 4-wall construction protects the tab contacts from bent-pin damage during blind mating.
Flammability and Temperature Range
UL94 V-0 rated housing (glass-filled PA66) means the header won't propagate a flame if the joint overheats — standard for power distribution inside an enclosure.