The FJ4B0621ZL from Panasonic Corporation is a MOSFET with Continous Drain Current -4.3 A, Drain Source Resistance 50 to 130 Milliohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 10 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Chip. More details for FJ4B0621ZL can be seen below.