The F0503XT-2WR3 is a 2W isolated DC-DC converter module from MORNSUN's F_XT-2WR3G series, specifically designed for on-board power systems requiring a voltage isolated from the input power supply . This model operates with an input voltage range of 4.5V to 5.5V and provides a regulated 3.3V output with up to 400mA output current . The module features continuous short-circuit protection, ultra-low no-load input current of 8mA, and 3000VDC isolation voltage with efficiency up to 86% in a compact SMD package measuring 13.2 x 8.5 x 7.3mm . It operates reliably over a wide temperature range of -40°C to +105°C and features international standard pin configuration for easy integration . This product is ideal for applications in pure digital circuits, general low-frequency analog circuits, relay drive circuits, data exchange circuits, and similar applications .