ActronAir PFC Capacitor 2.5kVAr 480V 3-Phase 60x156mm M12 is a Power Factor Correction capacitor for 3-phase commercial ActronAir systems, reducing reactive power draw from the supply circuit by correcting the power factor of inductive motor loads including compressors and 3-phase fans. PFC capacitors in 3-phase commercial units are subject to periodic dielectric degradation -- capacitance should be checked at each major service and replaced if measured below the rated value. Isolate power at mains before replacing any 3-phase PFC capacitor components.