This 4-channel solid state relay is suitable for switching AC voltage. It has a galvanic separation by integrated optocouplers and the switching of the load is done with transistors, which is why it has a much higher life span than mechanical relays. - Relay type Omron SSR - compatible with Raspberry Pi, Arduino, etc. - galvanic isolation, transistor switched, with fuse resistor (240 V, 2A) - 5 V DC Supply voltage - 240 V AC maximum load voltage - 2 A maximum load current - 0 - 2.5 V: relay off - 3.3 - 5 V: Relay On - 0 mA Quiescent current - 12,5 mA Operating current - 2 mA Tripping current - Dimensions (LxVxH): 57 x 55 x 23 mm https://elecena.pl/product/18282368/sbc-ssr01-developer-boards-4-way-solid-state-relay-5v-240v-2a 2021-05-02 https://elecena.pl/product/18282368/sbc-ssr01-developer-boards-4-way-solid-state-relay-5v-240v-2a 2022-10-31