2 7/32 INCH W X 2 15/16 INCH D X 3 7/32 INCH H SIZE; 50/60 HZ FREQUENCY RATING; UL 1585, CSA APPROVAL; NEMA DC20, NEC APPLICABLE STANDARD; PANEL MOUNTING; 40 VA POWER RATING; LEAD WIRE TERMINAL TYPE; 120 VAC PRIMARY VOLTAGE; 26.5 V SECONDARY VOLTAGE