The RS1G180MN from ROHM Semiconductor is a MOSFET with Continous Drain Current -57 to 57 A, Drain Source Resistance 5 to 9.2 Milliohm, 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 RS1G180MN can be seen below.