The QM2538N3 from uPI Semiconductor is a MOSFET with Continous Drain Current 10 to 56 A, Drain Source Resistance 2.3 to 8.0 milli-ohm, 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 QM2538N3 can be seen below.