The B0509S-1W with Power Modules SIP-4 RoHS manufactured by RLT is a single-channel switched-mode power supply module with over-voltage, over-current, and over-temperature protection. It can deliver up to 5V at 1A with an efficiency rating of 84%. The module features an ultra-small 20-pin SIP-4 package, allowing it to fit into limited design spaces. The module is RoHS compliant and designed to meet RoHS standards for hazardous materials.