Foundry Dual Zone Relay Controllers have 2 internal relays.
Each relay is individually rated for 20A (general purpose, tungsten, and resistive loads) or 16A (electronic ballasts).
However, the Foundry unit itself is rated for a max 20A/16A. The two circuits can split the amperage at any ratio (i.e. 18A on one and 2A on the other or 10A per circuit)