The XK1R9F10QB from Toshiba is a MOSFET with Continous Drain Current 160 A, Drain Source Resistance 1.6 to 3.31 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Surface Mount. More details for XK1R9F10QB can be seen below.