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Honeywell AT120/ AT140/ AT150A,B/ AT175A General Purpose Transformer

General Purpose Transformer
AT120/ AT140/ AT150A,B/ AT175A

Provide power to 24 Vac circuits in heating/cooling control systems. Intended for use in systems with predictable, uniform loads. Can be used in any application that does not exceed the listed ratings.

• Rated at 75 VA. 
• Color-coded lead wires for primary connections and screw terminals for secondary connections, fixed 1/4 inch (6 mm) male quick-connects or color-coded lead wires for both primary and secondary, are standard
• Meet NEC Class 2 requirements
• Meet Underwriters Laboratories Inc. Standard UL 1585 and are identified. Class 2 not wet, Class 3 wet

Select a link under the "item" tab below to order.

Cat #IncludesMountingNEMA Rating(inch)(Primary Voltage)(Secondary Voltage)(Output)(Primary) (inch)(Secondary) (inch)
AT120A1004Foot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mountedNo2 7/8 in. high x 1 7/8 in. wide x 2 15/16 in. deep120 Vac, 208 Vac, 240 Vac27 V.O.C.24 Vac at 20 VA9 in. leadwires(2) screw terminals
AT120B1028End bellsFoot-mountedNo1 11/16 in. high x 3 3/16 in. wide x 1 3/4 in. deep120 Vac27 V.O.C.24 Vac at 20 VA9 in. leadwires9 in. leadwires
AT140A1000Metal end bellsFoot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mountedNo3 3/16 in. high x 2 3/8 in. wide x 3 1/8 in. deep120 Vac27 V.O.C.24 Vac at 40 VA9 in. leadwires(2) screw terminals
AT140A1018Metal end bellsFoot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mountedNo3 3/16 in. high x 2 3/8 in. wide x 3 1/8 in. deep120 Vac, 208 Vac, 240 Vac27 V.O.C.24 Vac at 40 VA9 in. leadwires(2) screw terminals
AT140B1016Plastic end capsFoot-mountedNo1 11/16 in. high x 3 1/2 in. wide x 1 3/4 in. deep120 Vac27 V.O.C.24 Vac at 40 VA1/4 in. male quickconnects1/4 in. male quickconnects
AT140B1206Plastic end capsFoot-mountedNo1 11/16 in. high x 3 1/2 in. wide x 1 3/4 in. deep120 Vac27 V.O.C.24 Vac at 40 VA9 in. leadwires9 in. leadwires
AT140B1214Plastic end capsFoot-mountedNo1 11/16 in. high x 3 1/2 in. wide x 1 3/4 in. deep120 Vac, 208 Vac, 240 Vac27 V.O.C.24 Vac at 40 VA9 in. leadwires9 in. leadwires
AT140D1012End bellsintegral 4 x 4 in. mounting plate fits 2 x 4 in. or 4 x 4 in. outlet box.No2 5/8 in. high x 2 1/4 in. wide x 1 15/16 in. deep120 Vac27 V.O.C.24 Vac at 40 VA9 in. leadwires9 in. leadwires
AT150A1007Metal end bellsFoot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mountedNo1 11/16 in. high x 3 3/16 in. wide x 1 3/4 in. deep120 Vac, 208 Vac, 240 Vac27.5 V.O.C.24 Vac at 50 VA9 in. leadwires(2) screw terminals
AT150B1146Foot-mountedNo1 11/16 in. high x 3 1/2 in. wide x 1 3/4 in. deep120 Vac, 208 Vac, 240 Vac24 Vac at 50 VA9 in. leadwires9 in. leadwires
AT150B1252Plastic end capsFoot-mountedNo1 11/16 in. high x 3 1/2 in. wide x 1 3/4 in. deep277 Vac27.5 V.O.C.24 Vac at 50 VA9 in. leadwires with 1/4 in. male quickconnects9 in. leadwires with 1/4 in. male quickconnects with plastic (2) end covers
AT175A1008Metal end bellsFoot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mountedNEMA type E3 3/16 in. high x 2 3/8 in. wide x 3 5/8 deep120 Vac, 208 Vac, 240 Vac27.5 V.O.C.24 Vac at 75 VA9 in. leadwires(2) screw terminals


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