The electronic part B0509S-1W is a through-hole power module manufactured by GTL-POWER. It features surface mount technology, a wide input voltage range, and a wide output voltage range. This part is compliant with the Restriction of Hazardous Substances (RoHS) directive. It has a peak output power rating of 0.5W, and a maximum output current of 1A in a small SOT-23 package. It has an excellent line and load regulation and low temperature coefficient of its output voltage. The B0509S-1W also offers input and output current limiting, thermal overload protection, and short circuit protection. It is ideal for use in a wide range of applications.