The FDMB3800N from onsemi is a MOSFET with Continous Drain Current 4.8 A, Drain Source Resistance 40 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 V. Tags: Surface Mount. More details for FDMB3800N can be seen below.