The KFCAB21A50L from Nuvoton Technology is a MOSFET with Continous Drain Current 13.5 to 29 A, Drain Source Resistance 1.55 to 6.10 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 KFCAB21A50L can be seen below.