The DMN30H4D1S from Diodes Incorporated is a MOSFET with Continous Drain Current 0.43 A, Drain Source Resistance 2290 to 5000 Milliohm, Drain Source Breakdown Voltage 300 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for DMN30H4D1S can be seen below.