The B25620B1557K503 from TDK Corporation is a Power Capacitor with Capacitance 550 uF, Voltage Rating 1500 V, Peak Current 8400 A, Equivalent Series Resistance (ESR) 1.6 mOhm, Inductance 90 nH. Tags: Stud Mount, Film Capacitor. More details for B25620B1557K503 can be seen below.