The PMDXB550UNE from Nexperia is a MOSFET with Continous Drain Current 0.37 to 0.59 A, Drain Source Resistance 550 to 1500 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.45 to 0.95 V. Tags: Surface Mount. More details for PMDXB550UNE can be seen below.