Solidly fixed terminals with standard combination screw connections facilitate wiring All models built with heat-proof insulation for compact size and long life All terminals clearly identified with additive polarity markings Many multi-voltage primary and secondary models increase range of applications per unit Every coil bobbin-wound for greater efficency and superior heat evacuation capabilities Can be mounted either vertically or horizontally All units CSA Certified & UL Listed CE verified up to and including 5000 VA Indoor type open style / single phase [MO] Operating Frequency: 60 Hz (50/60 Hz available on some models) Insulation : 130 deg c: (25-1000 VA) - Class B 80 deg c Temp Rise 155 deg c: (1500-7500 VA) - Class F 100 deg c Temp Rise Sound level: less than 40 db Polarity: Additive