The SMD0805B020TF with PTC Resettable Fuses 0805 RoHS manufactured by Yageo is a surface-mount device (SMD) component used to provide protection against overcurrent and associated damage to the circuit it is installed in. It is a 4-leg radial leaded Polymer Positive Temperature Coefficient (PPTC) device packaged into a compact 0805 size package with a 20 A rated current. The component is RoHS certified and is also UL recognized. It helps to protect against overload and short circuits, and is especially useful in automotive, industrial, and consumer applications, where it can use to protect against sudden, transient overcurrents. Its narrow package profile helps to save board space for other components, and it also has low series resistance, allowing for higher current protection. Furthermore, this component has low power loss and low leakage current to prevent unnecessary energy consumption.