The Mean Well RSD-30H-3.3 is a fixed output single output 3.3V DC, 30 Watt constant voltage switch mode power supply (SMPS). It is designed using the latest high-efficiency circuit, with reliable full-range sets of protections such as short circuit, over voltage, and over temperature. This module features full range AC input, high DF (delta efficiency) around 96%, high power density (11.0W/in3), fanless, -40~+90°C operating temperature, and high-level global safety certifications (UL/CUL/TUV/CB/FCC). The RSD-30H-3.3 features a U-bracket/cover design, economical cost-effective solution, green design with RoHS compliant, and 2 year warranty.