Pumpjack capacitor with NEMA-3R galvanized enclosure. Its electrodes are vacuum-metallized on one side of the plastic film. It is made of seamless aluminium casing. It is self-healing over pressure tear-off fuse. It is pressure sensitive circuit interrupter. It is internally fused up to 10 kAIc, grounding. It has mounting stud at base of capacitor for easy mounting or replacement. It is designed for use in harmonic filters.