The IRFR5305 from JSMicro Semiconductor is a MOSFET with Continous Drain Current -40 to -50 A, Drain Source Resistance 0.020 to 0.040 ohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.5 to -3.0 V. Tags: Surface Mount. More details for IRFR5305 can be seen below.