JB Capacitors Radial Boxed Polyester Capacitors 100V 5% 5mm – JB Capacitors JFF02A392J050000B, A 3.9nF 100V miniature box type metallised polyester film capacitor. This capacitor is widely used in various DC and impulse circuits, such as communication equipment, radio, TV, VCD and other electronic equipment. JB Capacitors JFF02A392J050000B 3900pF 100V 5% Radial Boxed Polyester Capacitor