This data brief introduces the features of the STEVAL-ISA019V3 demonstration board, including a 3-phase 80W auxiliary output SMPS, quasi-resonant SMPS, input 180VAC to 600VAC, output voltage 24V, 3.3A, maximum output power 80W, efficiency > 80%, switching frequency > 50kHz, safety compliant to EN60950, feedback: secondary regulation, RoHS compliant.