The FC4B22270L from Panasonic Corporation is a MOSFET with Drain Source Resistance 12 to 37 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage 12 V, Gate Source Threshold Voltage 0.35 to 1.4 V, Gate Charge 9 nC. Tags: Chip. More details for FC4B22270L can be seen below.