The RFD16N05SM9A from onsemi is a MOSFET with Continous Drain Current 16 A, Drain Source Resistance 47 mohms, Drain Source Breakdown Voltage 50 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for RFD16N05SM9A can be seen below.