The 20 Amp single phase Buck-Boost transformer design for use to supply 12/24 Volt secondaries with 120/24 Volt primary. The .500kVA transformer produces 60Hz or 500 watts (20 Amps) of power at 24 volts. The transformer has a lead wire termination, knock outs and keyhole mounting holes for easy installation and has a Nema 3R enclosure suitable for indoor/outdoor use. The transformer is UL listed and CSA approved. The transformers dimensions are 9 3/8 inches by 4 3/8 inches by 4 1/16 inches.