The S2303 from ROHM Semiconductor is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 80 to 115 Milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -6 to 22 V, Gate Source Threshold Voltage 1.6 to 4 V. Tags: Die. More details for S2303 can be seen below.