The TR150 is magnetic transformer designed to power our 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. UL Listed to to ANSI/UL Standard 1012.