Omron is aiming to replace conventional contactors with its most powerful ac PCB relay yet: G9KA-1A-E, which handles up to 1kVac and carries up to 300A. Sitting on a 51 x 51mm footprint, the relay is ...

To support loads of widely varying sizes, the PCB supports an optoisolator that switches up to 1 A, a MOSFET that switches up to 2 A, and an on-board relay or SSR that can switch up to 3 A.