The ES1J is a fast recovery rectifier manufactured by GOODWORK. It has a voltage rating of 1.7V and current rating of 1A. It has a reverse leakage current rating of 5uA at 600V and a turn-on/off time rating of 35ns. It has single 1A capabilities, and is rated for operating temperatures of -65? to +150?, with a maximum junction temperature of 600V. It comes in an SMA (DO-214AC) package, and is compliant with RoHS standards.