The present work aimed to study the influence of ABS type and compatibilizer on the thermal and mechanical properties of PC/ABS blends. For that, blends of PC with two types of ABS, with different rubber content, were prepared at 70 wt% of PC and 30 wt% of ABS, without and with compatibilizer at loadings of 1, 3 and 5 wt%. The effectiveness of those formulations was examined by means of morphological (SEM), thermal (DSC, TGA) and mechanical (tensile and microhardness) properties. It was shown that the compatibilizer had in general beneficial effects on the global properties of PC/ABS blends, and that the optimal amount of compatibilizer depends on the ABS type.