Phoenix Contact 1740356 The PCB headers feature a nominal cross-sectional area of 2.5mm² and have a black color. They are rated for up to 12A of current at 320V, with a contact surface made of tin. The headers have a pin connection type, with six potentials, arranged in a linear pattern. Each potential has six connections, and the headers are designed for wave soldering mounting. Six solder pins are used per potential, with standard alignment to a plug-in system called COMBICON MSTB 2,5. The packaging of these headers is simple cardboard wrapping.