Specifications

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AT88 Transformer
Powers 24 Vac air conditioning circuits and other applications that
do not exceed the listed ratings.
• Meets NEC Class 2 not wet, Class 3 wet and U.L. 1585
requirements.
• Overload protection provided.
• Color-coded leadwires for primary connections.
Dimensions in inches (millimeters) Temperature Rating: -20 F to +105 F (-29 C to +41 C)
Frequency: 50 Hz; 60 Hz
Electrical Connections (main)
Primary: 12 in. leadwires
Secondary: 12 in. leadwires
Approvals:
Canadian Standards Association: Certified
Underwriters Laboratories, Inc. UL Component Recognized.
23/32
(19)
23/32
(19)
PRIMARY
LEADWIRES
(2,3 OR 4)
SECONDARY
LEADWIRES
M 994A
MOUNTING
SCREW
HOLES (4)
SIDE
BOTTOM
3/16
(5)
2-15/16
(75)
1-3/4
(45)
3-5/16 (84)
2-23/32
(69)
2-11/32
(60)
7/32
(6)
2-3/16
(56)
1-3/4
(45)
Product Number
Electrical Ratings
Mounting
Dimensions, Approximate
Includes
(Primary
Voltage)
(Secondary
Voltage) (Output) (inch) (mm)
AT88A1005 120 Vac 26.5 V.O.C. 24 Vac at 75 VA Foot-mounted 2 15/16 in. high x
2 3/16 in. wide x
3 5/16 in. deep
75 mm high
56 mm wide x
84 mm deep
Internally fused secondary for
overload protection.
* AT88A1021 208 Vac, 240 Vac 26.5 V.O.C. 24 Vac at 75 VA Foot-mounted 2 15/16 in. high x
2 3/16 in. wide x
3 5/16 in. deep
75 mm high
56 mm wide x
84 mm deep
Internally fused secondary for
overload protection.
AT88A1047 480 Vac 26.5 V.O.C. 24 Vac at 75 VA Foot-mounted 2 15/16 in. high x
2 3/16 in. wide x
3 5/16 in. deep
75 mm high
56 mm wide x
84 mm deep
Internally fused secondary for
overload protection.
* TRADELINE models • SUPER TRADELINE models