The KFCAB21B10L from Nuvoton Technology is a MOSFET with Continous Drain Current 22.7 to 54.0 A, Drain Source Resistance 0.60 to 3.00 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 KFCAB21B10L can be seen below.