There are few manufacturers produces silicone free thermal pad, not because they can’t make it, but because designers always request traditional thermal silicone pad and don’t develop a concept of silicone free material.

One of our customers used silicone free thermal pad providing by 3M, called 5578H, now they wanted to find an alternative in local market. He thought this must be a special thermal pad which is difficult to find in local market. When he showed me the data sheet, I told him that GLPOLY developed silicone free thermal pad years ago, I can provide an alternative XK-PN45 replacing 3M 5578H.

3M 5578H is a acrylic based thermal pad with thermal conducivity of 3.5W/mK, the thermal impedance is not given on data sheet, but I assume 3M 5578H is just a medium performance thermal pad by inferring thermal resistance from similar parts. GLPOLY released a high performance silicone free thermal gap pad several years ago which provwiding 4.5W/mK of thermal conductivity and 0.18℃in2/W of thermal resistance under 20psi, 0.5mm thickness circumstance. By comparison, we can find GLPOLY XK-PN45 silicone free thermal gap pad provides better thermal performanece than 3M 5578H.

We know that hardness will affect heat transfer, because low hardness or softer is more conformable to the topography of component. It will expel air from uneven surface and make contact effectively. GLPOLY XK-PN45’s hardness is Shore00 60, it is good for handling and provides good compression rate. 3M 5578H’s hardness is marked Shore00 38, probably it’s equivalent to Shore00 75, it is a little harder.

Inconclusion, we can see that no matter thermal performance or physical features, GLPOLY XK-PN45 can provides more excellent performance for you.