The TE Connectivity 1-1969740-4 is a 4-position, single-row RAST 5 header designed for board-to-cable/wire power interconnects. It carries a 5.00 mm pitch — the defining footprint dimension for the RAST 5 standard — and is rated for 16 A per circuit at 250 VAC. The full 4-wall shrouding protects the rectangular tab contacts from damage during blind-mate assembly, and the latch holder fastening type provides positive retention against vibration in the mated pair. Tin plating on both the mating surface and the solder posts (150.0 µin thickness) suits high-cycle production environments where cost per connection matters over extreme cycle life. The UL94 V-0 nylon housing and -40°C to 120°C operating range qualify it for enclosed equipment in industrial and appliance applications.
What the ratings mean for the fit
The 5.00 mm pitch is the first check for board layout — it sets the pad spacing and the footprint for the through-hole solder posts. At 16 A per circuit, this header carries bus-level current for a single-row part; the limiting factor is the temperature rise in the housing, not the contact itself, so derate above 120°C per the manufacturer's curve. The 150.0 µin tin plating on both mating and post surfaces gives good corrosion resistance for indoor environments but is not rated for the high mating-cycle counts that gold would support — expect several dozen cycles in a harness assembly, not thousands of field matings. The 4-wall shrouding and latch holder together mean this header mates with the matching RAST 5 receptacle housing and locks audibly, preventing accidental disconnection under vibration.