The B25620B1427K503 from TDK Corporation is a Power Capacitor with Capacitance 420 uF, Voltage Rating 1500 V, Peak Current 4200 A, Equivalent Series Resistance (ESR) 2.3 mOhm, Inductance 40 nH. Tags: Stud Mount, Film Capacitor. More details for B25620B1427K503 can be seen below.