Plate mounted 120 Vac Transformer. Overview Honeywell 40 VA transformers power 24V systems including thermostats, gas valves and relays. Features Override protection Color-coded lead wires for primary connections Energy limiting and meets NEMA Standard DC20-1992 Transformers are marked NEMA Type D enclosure Meets NEC Class 2 not wet, Class 3 wet and UL 1585 requirements Product Specifications Dimensions (in.) 3 7/32 in. high x 2 7/32 in. wide x (1 1/16 into plate x 2 in. above plate) deep Dimensions (mm) 81.8 mm high x 56.4 mm wide x (27 mm into box x 50.8 mm above box) deep Temperature Range (F) -20 F to +105 F Temperature Range (C) -29 C to +41 C Mounting 4 x 4 in. plate-mounted, protruding into junction box Electrical Ratings Primary voltage--120 Vac; Secondary voltage--26.5 V.O.C. Frequency 50 Hz; 60 Hz Approvals, Underwriters Laboratories Inc. UL Component Recognized. Approvals, Canadian Standards Association Certified NEMA Rating NEMA type D Approvals, N.E.C. NEC Approved. Electrical Connections (Primary)(in.) 9 in. leadwires Electrical Connections (Primary)(mm) 229 mm leadwires Electrical Connections (Secondary)(in.) (2) screw terminals Electrical Connections (Secondary)(mm) (2) screw terminals Electrical Ratings, Output 24 Vac at 40 VA