PW172KB0903B01 is a universal 20-watt ITE switch-mode power supply designed for industrial and commercial applications requiring regulated DC output. The unit features a 100-240VAC universal input range (±10%, 47-63 Hz) with inrush current limiting to 60A peak and an internal primary fuse rated at 3.15A, 250Vac. It employs a fixed-frequency flyback topology with output voltage regulation of ±1% line and ±5% load, delivering up to 18W at 9V output with a maximum ripple of 90mV peak-to-peak. The power supply meets EISA2007 and CEC Efficiency Level V standards, operates over 0°C to 40°C without derating, and includes comprehensive EMC compliance (EN55022 Class B, EN61000 series immunity standards) with a 3-year warranty. Its compact polycarbonate enclosure (84 × 47 × 32mm, 150g) and low no-load power consumption (<0.3W) make it ideal for desktop and wall-plug applications requiring reliable, efficient power conversion.