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AT150F Circuit Breaker Transformer
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 50 VA.
• Color-coded leadwires for primary connections and screw terminals
for secondary connections, fixed 1/4 inch (6 mm) male quick-
connects or color-coded leadwires 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.
Temperature Rating: -20 F to +105 F (-29 C to +41 C)
Frequency: 60 Hz
Includes: Button for manually resetting the circuit breaker and metal
end bells.
Electrical Connections (main)
Primary: 9 in. leadwires
Secondary: 9 in. leadwires
Approvals:
Canadian Standards Association: Certified: File No. LR95329-18
Underwriters Laboratories, Inc. UL Listed: File no. E14881, Guide no.
XOKV.
AT140B1016 120 Vac 27 V.O.C. 24 Vac
at 40 VA
1/4 in. male
quick-
connects
1/4 in. male
quick-connects
Foot-mounted 1 11/16 in. high
x 3 1/2 in. wide
x 1 3/4 in. deep
43 mm high x
89 mm wide x
75 mm deep
Plastic end
caps
AT140B1206 120 Vac 27 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
9 in. leadwires Foot-mounted 1 11/16 in. high
x 3 1/2 in. wide
x 1 3/4 in. deep
43 mm high x
89 mm wide x
75 mm deep
Plastic end
caps
AT140B1214 120 Vac,
208 Vac,
240 Vac
27 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
9 in. leadwires Foot-mounted 1 11/16 in. high
x 3 1/2 in. wide
x 1 3/4 in. deep
43 mm high x
89 mm wide x
75 mm deep
Plastic end
caps
AT140D1012 120 Vac 27 V.O.C. 24 Vac
at 40 VA
9 in
leadwires
9 in. leadwires integral 4 x 4 in.
mounting plate fits 2 x 4
in. or 4 x 4 in. outlet box.
2 5/8 in. high x
2 1/4 in. wide x
1 15/16 in. deep
67 mm high x
57 mm wide x
49 mm deep
Metal end
bells
AT150A1007 120 Vac,
208 Vac,
240 Vac
27.5 V.O.C. 24 Vac
at 50 VA
9 in.
leadwires
(2) screw
terminals
Foot mounted, plate
mounted on 2x4 in. or
4x4 in. outlet box, clamp
mounted using outlet
box knockout, or panel
mounted
1 11/16 in. high
x 3 3/16 in. wide
x 1 3/4 in. deep
43 mm high x
81 mm wide x
75 mm deep
Metal end
bells
AT150B1146 120 Vac,
208 Vac,
240 Vac
—24 Vac
at 50 VA
9 in
leadwires
9 in. leadwires Foot-mounted 1 11/16 in. high
x 3 1/2 in. wide
x 1 3/4 in. deep
43 mm high x
89 mm wide x
75 mm deep
—
AT150B1252 277 Vac 27.5 V.O.C. 24 Vac
at 50 VA
9 in.
leadwires
with 1/4 in.
male quick-
connects
9 in. leadwires
with 1/4 in.
male quick-
connects with
plastic (2) end
covers
Foot-mounted 1 11/16 in. high
x 3 1/2 in. wide
x 1 3/4 in. deep
43 mm high x
89 mm wide x
75 mm deep
Plastic end
caps
AT175A1008 120 Vac,
208 Vac,
240 Vac
27.5 V.O.C. 24 Vac
at 75 VA
9 in.
leadwires
(2) screw
terminals
Foot mounted, plate
mounted on 2x4 in. or
4x4 in. outlet box, clamp
mounted using outlet
box knockout, or panel
mounted
3 3/16 in. high x
2 3/8 in. wide x
3 5/8 deep
81 mm high x
60 mm wide x
92 mm deep
Metal end
bells
Product Number
Electrical Ratings
Electrical Connections
(main)
Mounting
Dimensions, Approximate
Includes
Voltage
Output Primary Secondary (inch) (mm)Primary Secondary
Product Number
Electrical Ratings
Mounting
Dimensions, Approximate
Voltage
Output (inch) (mm)Primary Secondary
* AT150F1022 120 Vac,
208 Vac,
240 Vac
27.5 V.O.C. 24 Vac at 50 VA Includes 1/2 14 NPSM conduit connector and lock nut
for mounting on plate or panel (not included) with 7/8 in.
knockout, and feet for surface mount.
3 3/16 in. high x
2 3/16 in. wide x
3 5/8 in. deep
81 mm high x
56 mm wide x
93 mm deep
* AT150F1030 208 Vac,
277 Vac,
480 Vac
27.5 V.O.C. 24 Vac at 50 VA Includes 1/2 14 NPSM conduit connector and lock nut
for mounting on plate or panel (not included) with 7/8 in.
knockout, and feet for surface mount.
3 3/16 in. high x
2 3/16 in. wide x
3 5/8 in. deep
81 mm high x
56 mm wide x
93 mm deep
* TRADELINE models • SUPER TRADELINE models