4 circuits at 1.25 mm — BOM-fit and footprint
The 5055670451: This is a 4-position, single-row header from the Molex Micro-Lock PLUS 505567 series. The 1.25 mm pitch sets the PCB footprint — tight enough for a compact board but still routable on a standard two-layer design. The right-angle SMT orientation routes the mating cable parallel to the board surface, which helps when the z-height budget is under the 3.90 mm insulation height. The shrouded 4-wall housing protects the pins during handling and guides the receptacle into alignment.
30 µinch gold — field-service duty
Both the mating and post contacts carry 30 µinch gold over nickel.
Locking ramp and UL94 V-0 housing
The locking ramp on the header mates with a corresponding latch on the receptacle, providing a positive hold against vibration — a common requirement in automotive and industrial applications.
Active production, ROHS3 compliant
Listed as Active with no end-of-life notice. ROHS3 compliant, which covers the full RoHS substance scope including the four phthalates.