This SCA Rocker Switch (12.2mm mounting opening) comes capable of 12V - 30 Amps and 24V - 15 Amps. One noted advantage of the rocker is they aren't usually accidentally activated like some other switches, because they require applied pressure in order to be cut on or off.
On/Off Rocker Switch
Max Amperage: 30A - 12v, 15A - 24V
12.2mm Mounting Opening