The PJD18N20 from PANJIT Semiconductor is a MOSFET with Continous Drain Current 18 A, Drain Source Resistance 126 to 160 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for PJD18N20 can be seen below.