The RMA9N20S5 from Rectron Semiconductor is a MOSFET with Continous Drain Current 0.87 A, Drain Source Resistance 190 to 455 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.5 to 1 V. Tags: Surface Mount. More details for RMA9N20S5 can be seen below.