A single-pole switch has only two conductor terminals. To one terminal, you connect the supply (hot) wire, and to the other you connect the load wire. All this switch does is interrupt or not ...
The DG723 was just released by Vishay. This analog switch is a monolithic dual single-pull, single-throw switch designed to switch both analog and digital signals. It operates from single 1.8 V to 5.5 ...