Board-to-wire header with locking ramp and board lock
The 770876-1: This is a 9-circuit, 3-row header from the Mini-Universal MATE-N-LOK series, designed for board-to-cable/wire applications. The 4.14mm pitch sets the board footprint and the per-contact current ceiling — current rating varies by wire gauge, so the limiting factor is the wire size selected, not the contact itself. The shrouded 4-wall design protects the male pins during mating and prevents misalignment. Rated 600VAC with an operating temperature range of -20°C to 85°C, this header suits general-purpose power distribution inside enclosures where the UL94 V-0 nylon housing provides flame resistance.
Contact finish and mating cycle life
Both the mating and post contact finishes are tin-lead with a thickness of 150.0µin (3.81µm). Tin-lead is a legacy plating — it offers good solderability and corrosion resistance for moderate mating cycle counts, typically 25-50 cycles, suitable for applications where the connector is not frequently disconnected. The brass contact material provides adequate conductivity and spring properties for the rated current range.