The QS6K1 from ROHM Semiconductor is a MOSFET with Continous Drain Current -1 to 1 A, Drain Source Resistance 170 to 364 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.5 to 1.5 V. Tags: Surface Mount. More details for QS6K1 can be seen below.