ThermalPak™ is an ideal way to lower the thermal resistance with capacitor construction. The compression mounting on a plastic peg in the molded top and an aluminum peg in the can bottom, combined with extended cathode foil, delivers a solid metal-to-metal connection with the capacitor element. This allows it to run cooler by having the can at the same temperature as the capacitor element. Other advantages of ThermalPak are its superior ability to withstand mechanical shock and vibration, its lighter weight compared to units with potting compound such as tar, and its lack of risk of the safety vent being blocked by tar.