What the 431603103 is
The Molex 431603103 is the 3-circuit member of the Sabre 43160 series — a single-row, right-angle male header with 0.295 inch (7.50 mm) pitch, rated 18 A per contact at up to 600 V. Tin-plated brass contacts at 60 µin (1.52 µm) thickness, housed in a black glass-filled nylon insulator. The locking ramp on the header body mates with the corresponding Sabre receptacle housing to resist vibration pull-out — a meaningful distinction from friction-fit headers that rely solely on header-to-housing interference.
Board fit and footprint
The 7.50 mm pitch on the Sabre 43160 exceeds that of typical Molex SL headers — the wider spacing supports the 600 V rating and provides creepage margin without a shrouded body.
Current and voltage — power duty, not signal
Mating half and locking ramp
The 431603103 mates with the matching Sabre 43160 series female receptacle housing. The locking ramp on the header body engages the housing latch to resist accidental unmating under cable pull or vibration — a detail that matters in harness assemblies routed through enclosures with limited access for re-mating. Confirm the housing position count matches the 3 circuits of the 431603103 before specifying.
Sourcing and compliance
The 431603103 is listed as Active and ROHS3 Compliant — quoted to order against BOM quantities with no official successor or cross-reference on record. The black glass-filled nylon insulator (PA46/Nylon 4/6, glass-filled) is the series standard and is not colour-coded for circuit identification the way some keyed power headers are.