The RS1E240BN from ROHM Semiconductor is a MOSFET with Continous Drain Current -40 to 40 A, Drain Source Resistance 2.3 to 4.6 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for RS1E240BN can be seen below.