The UN400N26T from UN Semiconductor is a MOSFET with Continous Drain Current 8.0 A, Drain Source Resistance 18 to 30 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for UN400N26T can be seen below.