The GCMX1P4B120S4B1-N from SemiQ is a MOSFET with Continous Drain Current 869 to 1010 A, Drain Source Resistance 1.4 to 2.3 milli-ohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -4.5 to 18 V, Gate Source Threshold Voltage 1.8 to 4 V. Tags: Module. More details for GCMX1P4B120S4B1-N can be seen below.