40-Pin DIP Header for High-Density Board Interconnects
The 840-AG11D-ESL-LF: The open-frame PCT housing (UL94 V-0 rated) exposes the solder tails for visual inspection and rework, while the beryllium copper mating contacts with gold flash finish provide reliable signal-level connections for repeated but not high-cycle mating.
Copper post material with gold flash finish keeps the solder joint corrosion-resistant and compatible with standard lead-free soldering profiles.
Gold Flash Contacts and Contact Resistance
Contact resistance is rated at 10 mOhm, a typical value for a gold-on-gold interface in a dry-circuit signal path — the beryllium copper beam maintains normal force to keep resistance stable over temperature.
