Technical GuidesHirose Connector Selection Guide: DF13, GT Series & Fine-Pitch FPC ConnectorsKey Takeaways Au-plated vs Sn-plated contacts: specify Au plating for circuits below 100 mV or above 500 mating cycles. Sn-plated contacts form SnO films under humid conditions (85°C/85% RH), raising Rc from ~10 mΩ to >100 mΩ after 500 cycles,… lcsccableMay 22, 2026