The TR150 is magnetic transformer designed to power TEKA's wide range of low voltage and BKSSL® lighting products up to 150 watts. Stainless steel, NEMA Outdoor 3R rated enclsosure. [3] bottom entry 1/2" knockouts provide access to wiring compartment. 120VAC or 277VAC input. 12VAC output (fully loaded). 0.6A (120VAC) or 0.3A (277VAC) maximum no load input current. 25A secondary circuit breaker.