The 77311-827-15LF: The unshrouded design gives you access to the pins from three sides, which helps when routing traces to the board edge or when the mating receptacle needs a low-profile approach. Overall contact length is 0.465" (11.81 mm), split into a 0.260" (6.60 mm) mating pin and a 0.105" (2.67 mm) solder tail. The tail length is short enough to keep the solder joint close to the board surface, reducing the lever arm from cable strain.
Current and Contact Interface
For a 15-position header carrying 3 A on every pin, the total heat load is 45 A distributed across the row; the UL94 V-0 thermoplastic housing handles that without exceeding the material limit, but derate if the ambient climbs toward the 125°C ceiling. The phosphor bronze base metal springs back well under repeated insertion, and the gold layer prevents oxide build-up that would raise contact resistance over time.