The FK4B0343ZL from Panasonic Corporation is a MOSFET with Continous Drain Current 0.15 A, Drain Source Resistance 40 to 900 Milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -0.5 to 5 V, Gate Source Threshold Voltage 0.35 to 0.9 V. Tags: Chip. More details for FK4B0343ZL can be seen below.