The RUR040N02 from ROHM Semiconductor is a MOSFET with Continous Drain Current -4 to 4 A, Drain Source Resistance 25 to 110 Milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -10 to 10 V, Gate Source Threshold Voltage 0.3 to 1.3 V. Tags: Surface Mount. More details for RUR040N02 can be seen below.