2 7/32 INCH W X 2 15/16 INCH D SIZE; 50/60 HZ FREQUENCY RATING; UL 1585, CSA APPROVAL; NEMA DC20, NEC APPLICABLE STANDARD; FOOT MOUNTING; 48 VA POWER RATING; LEAD WIRE TERMINAL TYPE; 277 VAC PRIMARY VOLTAGE; 26.5 V SECONDARY VOLTAGE