ITEM NAME:New Useful Module DC to DC 4V-38V to 1.25V-36V 5A Step Down Power Supply 3C.DC/DC Converter MAX 5A x 1. Module property: Non-isolated step down module(BUCK). Heat sink x 1. Short circuit protection: (current limiting 8A). Short circuit protection: Yes. Load regulation rate: S (I) ≠¤ 0.8%.