The B0503S-1WR2 is a Power Module SIP-4 (Single In-Line Package) RoHS (Restriction of Hazardous Substances) component manufactured by Bothhand. It is a 4-pin switching voltage regulator with a fixed output of 5 Volts. It has 0.1 A output current and a 1:1 input-output isolation. This component is specifically designed for medical, industrial, and transportation applications. Its operating temperature range is -40°C to +85°C, and has a max 50 kHz switching frequency. It also features a high efficiency and low power dissipation. Its reliability is enhanced by dual metal shielding construction and an over temperature protection circuit. It is RoHS compliant, meaning it meets the requirements for hazardous materials in electronic products, allowing for safer operation.