The IXFN210N30X3 from Littelfuse is a MOSFET with Continous Drain Current 210 A, Drain Source Resistance 4.6 Milliohm, Drain Source Breakdown Voltage 300 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 4.5 V. Tags: Chassis Mount. More details for IXFN210N30X3 can be seen below.