Specifications

Transformers
176 customer.honeywell.com 70-6910
AT87 NEMA Standard Transformer
Used primarily for powering 24V air conditioning circuits. Can also
be used in other applications that do not exceed the listed ratings.
• Meets NEC Class 2 not wet, Class 3 wet and UL 1585 requirements.
• Transformer marked NEMA Type E.
• Overload protection provided.
• Color-coded leadwires for primary connections.
Temperature Rating: -20 F to +105 F (-29 C to +41 C)
Frequency: 50 Hz; 60 Hz
NEMA Rating: NEMA type E
Approvals:
Canadian Standards Association: Certified
Underwriters Laboratories, Inc. UL Component Recognized.
Dimensions in inches (millimeters)
Product Number
Electrical Ratings
Electrical
Connections (main)
Mounting
Dimensions, Approximate
Includes
Voltage
Output Primary Secondary (inch) (mm)Primary Secondary
AT87A1049 120 Vac 26.5 V.O.C. 24 Vac
at 48 VA
12 in.
leadwires
12 in.
leadwires
Foot-mounted 2 15/16 in. deep x
2 7/32 wide
74.6 mm deep x
65.4 mm wide
Energy limiting
overload protection
• AT87A1106 120 Vac,
208 Vac,
240 Vac
26.5 V.O.C. 24 Vac
at 48 VA
13 in.
leadwires
(2) screw
terminals
Foot mounted
or 4x4 in plate.
2 15/16 in. deep x
2 7/32 wide
74.6 mm deep x
65.4 mm wide
Built-in protection.
Primary winding
burnout.
AT87A1155 480 Vac 26.5 V.O.C. 24 Vac
at 48 VA
12 in.
leadwires
12 in.
leadwires
Foot-mounted 2 15/16 in. deep x
2 7/32 wide
74.6 mm deep x
65.4 mm wide
Energy limiting
overload protection
AT87A1189 277 Vac 26.5 V.O.C. 24 Vac
at 48 VA
12 in.
leadwires
12 in.
leadwires
Foot-mounted 2 15/16 in. deep x
2 7/32 wide
74.6 mm deep x
65.4 mm wide
Energy limiting
overload protection
* TRADELINE models • SUPER TRADELINE models
3-3/8 (86)
1/8 (3)
4-3/16
(106)
3-3/8
(86)
1/4 (6)
3/16 (5)
3-1/4 (83)
5/16 (8)
2 (51)
1/8
(3)
2-3/8
(60)
21/32
(17)
2-9/32 (58)
1-1/4
(32)
21/32
(17)
7/8 (22)
7/32 (6)
1-3/4
(45)
2-7/32
(56)
3/16 (5)
M16623A