The NTJS4151PT1 from onsemi is a MOSFET with Continous Drain Current -4.2 A, Drain Source Resistance 47 to 205 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.2 to -0.4 V. Tags: Surface Mount. More details for NTJS4151PT1 can be seen below.