ITEM NAME:RobotDyn Ac Light Dimmer Module, 2 Channel, 3.3v/5v Logic, Ac 50/60hz, 220v A3A3 RobotDyn Ac Light Dimmer Module, 2 Channel, 3.3v/5v Logic, Ac 50/60hz, 220v A3A3 Product Overview This module is the same, that the Thyristor AC switch. The difference is only in two channels. So the same low on-resistance and a control voltage, same compatibility with any 3.3V or 5V micro-controllers or mechanical switches. It has the same optoisolator, as well as a place to install the radiator. Check out 1 channel thyristor. Specification VAC AC 220V/5A peak 10A Operating voltage:3.3V/5V Signal level:DC 3.3V/5V 10mA Thyristor BTA16:600B Optoisolator:MOC3042 PCB size:22.00×46.00mm Documents Documents (Instruction manuals, schematics, etc), links: https://robotdyn.com/Mod-ThyristorACswitch-5A-2L-EN â€â€English; https://robotdyn.ru/Mod-ThyristorACswitch-5A-2L-RU  Russia. Color as shown Material: plastic + metal Package Contents: 1*AC Module.The difference is only in two channels. Check out 1 channel thyristor. Signal level:DC 3.3V/5V 10mA. VAC AC 220V/5A peak 10A. Color as shown. PCB size:22.00×46.00mm.