The TM600FF12S3-W3A01 from Dynex Semiconductor is a MOSFET with Continous Drain Current 600 A, Drain Source Resistance 2.2 to 3.8 milli-ohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -8 to 19 V, Gate Source Threshold Voltage 1.6 to 3.6 V. More details for TM600FF12S3-W3A01 can be seen below.