The KFCAB21B30L from Nuvoton Technology is a MOSFET with Continous Drain Current 14.6 to 31.0 A, Drain Source Resistance 1.50 to 6.60 milli-ohm, Drain Source Breakdown Voltage 12 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.35 to 1.40 V. Tags: Chip. More details for KFCAB21B30L can be seen below.