The RM138 from Rectron Semiconductor is a MOSFET with Continous Drain Current 0.22 A, Drain Source Resistance 1100 to 3500 milliohm, Drain Source Breakdown Voltage 50 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.6 to 1.4 V. Tags: Surface Mount. More details for RM138 can be seen below.