- Color: Black Operation mode ON-OFF Current rating 20 Amps Operating voltage 240 Volts Contact type Normally Open Connector type Plug In Switch type Push Button Terminal Solder Material Polybutylene Terephthalate About this item 40A High Power Load Switch: Max 20Amp, AC100-240V, this smart water heater switch needs neutral wire, very suitable for indoor high power electrical appliances, such as water heater, intelligent boiler,etc. Supports high power electrical appliances within 4000W. This 20A high power load switch has a wider range of use. Note: the smart switch needs to be within



