The C4AQLBW5400A3FK from Kemet Corporation is a Power Capacitor with Capacitance 40 uF, Voltage Rating 500 V, Peak Current 262 A, Equivalent Series Resistance (ESR) 3.4 mOhm, Inductance 12 nH. Tags: Through Hole, Film Capacitor. More details for C4AQLBW5400A3FK can be seen below.