5 75 inches long by approximately 0 002 inches thick material 11 was placed between conductive sheets 12 thus a large copper material copper sandwich results final surface mount devices are produced from this layer unit in one of several ways including punching die cutting or stamping the maximum size of the particles is determined by the spacing between the conductive sheets the conductive sheet spacing should equal at least 2 particle diameters for example 3 particle diameters preferably at least five particle diameters for example using conductive sheet spacing of approximately one thousand microns maximum particle size is approximately two hundred microns smaller particle sizes can also be used with greater particularly as discussed above in the above mentioned embodiment the resultant composite was placed in a large two platen hydraulic press and compressed to a thickness of 0 030 inches the pressed composite was then pre cured in the press at 120 degrees celsius 3000 psi for 15 minutes then placed in an oven where it was cured at 125 degrees celsius for four hours the device subassembly was cut away from the resultant composite sheet fig2 and 3 depict an overvoltage protection device incorporating a cut away portion of the subassembly of fig1 referring to fig3 a surface mount device is shown which has l shaped conductors or leads 17 having first planar portions 18 connected to corresponding conductive sheets 12 and having second planar portions 19 connected to spaced surface leads 21 carried by an insulating board 22 and serving to interconnect the surface leads 21 when an overvoltage is applied therebetween one of said leads may be a ground lead as the fig3 suggests the overvoltage protection apparatus of the present invention has a moldable design as.