The C4AQQBW5400A3NJ from Kemet Corporation is a Power Capacitor with Capacitance 40 uF, Voltage Rating 1100 V, Peak Current 428 A, Equivalent Series Resistance (ESR) 4 mOhm, Inductance 15 nH. Tags: Through Hole, Film Capacitor. More details for C4AQQBW5400A3NJ can be seen below.