Signal Transformer/Bel Lighting (LT) Transformers offer a 50VA rating, 120V to 277V, 50/60Hz primary rating, and 12V @ 4.17A secondary rating. These compact LT transformer components feature Safety Extra Low Voltage (SELV) outputs designed for industries and OEM installations of landscape, track, recessed, and LED lighting. The LT277-50-12 is ideal for 480V, 3 phase 4-wire systems while the LT120-50-12 is designed for single phase 120V 50/60Hz supplies.