SMAKN&reg; AC/DC-DC AC 4-29V / DC 5-40V TO 1-35V 10A DC-DC AC-DC step-down power converter Module Name: 10A constant voltage constant current buck. Module Properties: non-isolated buck module (BUCK). Input voltage: DC: 5-40V; AC: 4-29V. Output voltage: 1-35V continuously adjustable (default output voltage to 5V shipping). Output current range: 0.3-10A (adjusted 3A default shipping).