As electronics continue to shrink and their performance capabilities grow, these electronics are becoming more and more integrated into our daily lives. The next step is the internet of everything and wearable electronics. Communication between devices and providing power through the use of connectors is critical; connector sales are a $50 billion/year industry. As critical as they are, separable connectors are often times the first item to fail in electronics. This problem is only expected to worsen as electronics are used in increasingly challenging environments. This paper will discuss contact physics, contact plating options, normal force requirements and general tradeoffs that frequently occur when designing or selecting a connector for an application. Physics of failure along with a number of connector failure examples will be presented as well.