The GCMS1P0B120S4B1-N from SemiQ is a MOSFET with Continous Drain Current 1223 to 1421 A, Drain Source Resistance 1 to 1.7 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 GCMS1P0B120S4B1-N can be seen below.