Relays are usually used to switch AC voltages by means of an electronic control because of their simplicity. However when switching occurs too frequently or too quickly the life time of the contact points is shortened considerably. This can be solved perfectly by replacing the relays with a triac. Using optocouplers the entire interface network remains electrically isolated from the voltage that has to be switched.

4 triac outputs: 4 triac outputs of 1.5A (uncooled 4A cooled)
Power supply: 9V DC 200mA
PCB dimensions: 3.1 x 3.5Requires soldering.Ages 12+