The FDB9503L-F085 from onsemi is a MOSFET with Continous Drain Current -110 A, Drain Source Resistance 2 to 3.7 milli-ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -16 to 16 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Surface Mount. More details for FDB9503L-F085 can be seen below.