Proma cobritherm boards cu 35 m single sided proma 108050 005030 the proma h3530 cobrithermreg board cu 35 microm single sided 30 x 50 x 50mm is a laminate comprising of an aluminium carrier plate with a coating of polymer ceramic compound above this is a layer of coppercobrithermreg is used mainly at all the places where the arising power loss heat must be dissipated as soon as possible typical application areas are the assemblies of performance electronics such as the power led