HY1804D/U/S Absolute Maximum Ratings Symbol Parameter Common Ratings (TC=25°C Unless Otherwise Noted) VDSS Drain-Source Voltage VGSS Gate-Source Voltage TJ Maximum Junction Temperature TSTG Storage Temperature Range IS Diode Continuous Forward Current Mounted on Large Heat Sink TC=25°C IDM Pulsed Drain Current ID Continuous Drain Current PD Maximum Power Dissipation RθJC Thermal Resistance-Junction to Case RθJA Thermal Resistance-Junction to Ambient EAS Drain-Source Avalanche Energy.