The mainstream ESCs used in FPV racing quads are equipped with MOS-FET of 3.3×3.3mm. MOSFETs of these dimensions are typically lower in efficiency and reliability. With the same overall dimensions, our carefully designed IS series of high performance ESCs are furnished of 6 standard sized MOS-FETs in a larger size of 5x6mm, to meet the increasing demandsin electric current of new motorsused in FPV racing. The standard sized MOSFETs are manufactured of more matured technologies, larger heat dissipating areas, and lower resistance. Spedix ESCs made of these parts are improved in heat dissipation and therefore are more reliable than ESCs with smaller MOSFETs. Furthermore, other factors such as better design, fast EFM8BB21 MCU, independent half bridge drive chip, and 3 Oz copper PCB with high TG, all make IS ECSs one of thebest in the market.