KCD11 3-Pin Mini Round On-Off Switch - Black
 
It is a 3-pin open rocker switch type. It is widely used in electronic devices and home appliance control.
 
Type: On-Off Rocker Switch
Color: Black
Diameter: 15mm
Terminal: 3 pins
Pin spacing:  5mm
Current / Voltage: 3A 250VAC | 6A 125VAC