Antispark is a handy component that prevents the spark from jumping when connecting the battery to the drone. This is caused by the rapid charging of the capacitor on the ESC and is noticeable especially with 6S drones. In addition to the unpleasant sound, the spark gradually burns the connectors for connecting the battery, increases their transition resistance and shortens their lifetime.
The larger antispark 30x16mm is equipped with a pair of MOSFETs and thus heats up less even with higher currents. It is therefore suitable for larger and stronger 7-10" drones.
Mosfet datasheet