Board Fit and Circuit Count — 8 Positions at 0.100" Pitch
The 76383-404LF: At full load the 8 circuits carry 24 A total, but the derating curve (per the Dubox™ application note) drops the per-contact current above 85 °C ambient.
Mating and Locking — Friction Lock Keeps the Pair Together
The friction lock on the 2-wall shroud engages with the mating receptacle housing — it provides a positive detent that resists vibration and cable pull without a secondary latch. In a panel or cabinet where the harness is routed near moving parts, this lock prevents the header from backing out of the receptacle. Tin-on-tin contacts at 78.7 µinch thickness are rated for a few dozen mating cycles; for higher reconnect duty, the gold-plated sibling (76383-303LF) is the better choice.
Position Count vs. Siblings — 8 vs. 6 vs. 4
Within the 76383 series, the 8-position 76383-404LF sits between the 6-position 76383-403LF and the 4-position 76383-402LF. If the BOM calls for 6 circuits, the 76383-403LF is a drop-in replacement on the same footprint; for 4 circuits, the 76383-402LF.