Honeywell 120V/24V Step Down Transformer. This knockout mount transformer is NEC approved, UL listed, and CSA certified for safety and reliability. It features a VA rating of 40, a primary voltage of 120 volts, a secondary voltage of 26.5 volts, a NEMA rating of D, an operating temperature of -29 to 41 degree C, a termination type of screw, and a mounting type of clamp. It comes boxed.