The ISM20NS2-43 from ISOCOM is a MOSFET with Continous Drain Current 45 A, Drain Source Resistance 0.077 ohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.0 to 4.0 V. Tags: Surface Mount. More details for ISM20NS2-43 can be seen below.