The APT5030BN from Microchip Technology is a MOSFET with Continous Drain Current 21 A, Drain Source Resistance 300 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for APT5030BN can be seen below.