The RAC20-K series consists of highly efficient PCB-mounted power converter modules with extremely low energy losses, especially under low load conditions, making them a benchmark for Always-On and standby operation typically associated with IoT and smart applications. The power supply units cover a worldwide input voltage range of 85 VAC to 305 VAC and have international safety certifications for industrial, AV, and ITE as well as household standards. These AC/DC modules operate in a temperature range of -40 °C to +85 °C with an operating altitude of up to 5000 m and offer fully protected single or dual outputs, as well as EMC Class B compliance without the need for external components in earth-free connections. Modified versions for OVC III requirements are available upon request.