The SMF12A is an unidirectional Transient Voltage Suppressor (TVS) Diode made by GOODWORK and packaged in the SOD-123FL case. It protects sensitive electronics from voltage spikes and transients. It has 10.1A peak pulse current and a 2.5uA maximum leakage current. The voltage rating is 19.9V, 13.3V, 12V and 14.7V, and it is RoHS compliant.