The 2N6661 from TT Electronics is a MOSFET with Continous Drain Current 0.9 A, Drain Source Resistance 5300 to 7500 milliohm, Drain Source Breakdown Voltage 90 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.3 to 2 V. Tags: Through Hole. More details for 2N6661 can be seen below.