With thermal conductivity of 6 W/mK and thermal impedance of just 0.05 Kin.²/W, Keratherm U 90 thermal interface material from MH&W International has a voltage breakdown property of 4 kV. It provides perforation protection with a tensile strength of 2.500 N/mm² and a Shore A hardness of 70. The material is available in 0.100 mm and 0.200 mm thicknesses (3.900 mil and 7.800 mil). Applications for silicone-free U 90 thermal interface pads include medical devices, laser equipment, lighting systems, solar energy, disc drives, and aerospace electronics. From $0.15 for 1-in.², 0.200-mm thick pads.