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 efficiency and superior heat evacuation capabilities Can be mounted either vertically or horizontally Less than 40 dB noise level 130 deg C Insulation For indoor use Cooper winding 0.42, 0.21 (Primary)/4.17, 2.08 A (Secondary) Amperage Rating Specifications Connection Type : Screw Dimensions : 2-1/2 in H x 3 in W Insulation : Class Class B Maximum Amperage Rating : 0.42/0.21 A Mounting Type : Surface Series : MO Series Temperature Rating : 80 deg C Type : Open Style Secondary Voltage : 12/24 VAC Power Rating : 50 VA Frequency Rating : 60 Hz Phase : 1