The B0515S-1W is an electronic part manufactured by RLT which is a Power Modules SIP-4 device which is RoHS compliant. It is a surface mount circuit board component with 4 poles and 4 pins. The pins are arranged in a full square package form factor and have a maximum voltage of 600V. It has features such as high over current, over voltage protection and temperature protection. It is capable of being used for applications such as lighting, motor control, audio amplifiers and LED displays.