The current signal contact used on all Datamate variations is constructed from a 4-fingered Beryllium Copper female contact clip, housed inside a brass turned shell. The contact system gives superb performance, for both electrical and mechanical specifications, with environmental resistance to shock and vibration, and a temperature range up to 125°C. However, the contact is limited to 3.3 A max (25°C ambient) individually, or 3 A max when all contacts are electrically loaded.