The 4RB8300-3JA20 from Siemens is a Power Capacitor with Capacitance 21.7 uF, Voltage Rating 800 V, Peak Current 10000 A, Mass 3.1 Kg, Operating Temperature -40 to 60 Degree C. Tags: Screw Mount, Film Capacitor. More details for 4RB8300-3JA20 can be seen below.