The Polytronics SMD2920P500TF/16 is a PTC Resettable Fuses 2920 RoHS. It is an integrated over current/over temperature protection device designed to protect against short circuits, over current, and/or overheating. The PTC mechanism provides circuit protection against excessive overload by resetting after the current is reduced and/or the temperature is lowered. RoHS compliant, it features low dynamic impedance, fast response time, and UL, VDE, CSA, and TUV approvals.