Heating and Cooling Components Materials

Universal Transformers
Electrical
Ratings
(VA)
Electrical
Ratings
(Input
Voltage)
Product
Number
NEMA
Rated
Mounting
Main
Connections
Secondary
Connections
Frequency
Dimensions (in.)
H x W X D
NOTES
40 VA 208/240 Vac
AT72D1733
Yes M L S A 3 7/32 x 2 7/32 x 3 1/16 Only in Canada
50 VA
120/208/
240 Vac
AT87A1106
Yes M L S A 2 15/16 x 2 7/32 x 2 1/4 Built-in protection; Primary winding burnout
20 VA
120/208/
240 Vac
AT120A1004
No M L S B 2 7/8 x 1 7/8 x 2 15/16 Metal end bells
40 VA
120/208/
240 Vac
AT140A1018
No M L S B 3 3/16 x 2 3/8 x 3 1/8 Metal end bells
75 VA
120/208/
240 Vac
AT175A1008
No M L S B 3 3/16 x 2 3/8 x 3 5/8 Metal end bells
Transformers
19 VA 120 Vac
AT20A1123
Yes
F L L
A
2 x 2 1/4 x 1 7/8
40 VA
120 Vac
AT72D1006
P S
3 7/32 x 2 7/32 x (1 1/16
into x 2 in. above plate)
AT72D1089
F S 3 7/32 x 2 7/32 x 3 1/16
AT72D1188
P L 3 7/32 x 2 7/32 x 2 15/16
AT72D1683
M S
3 7/32 x 2 7/32 x 3 1/16
AT72D1956
M L Only in Canada
208/240 Vac
AT72D1691
M S
48 VA
277 Vac
AT87A1189
F L
2 15/16 x 2 7/32 x 2 1/4
Energy limiting overload protection
480 Vac
AT87A1155
F L Energy limiting overload protection
20 VA 120 Vac
AT120B1028
No
F L
B
1 11/16 x 3 3/16 x 1 3/4 Metal end bells
40 VA
120 Vac
AT140A1000
M S 3 3/16 x 2 3/8 x 3 1/8 Metal end bells
AT140B1206
F L 1 11/16 x 3 1/2 x 1 3/4 Plastic end caps
120/208/
240 Vac
AT140B1214
F L 1 11/16 x 3 1/2 x 1 3/4 Plastic end caps
50 VA
120/208/
240 Vac
AT150A1007
M
L
S 1 11/16 x 3 3/16 x 1 3/4 Metal end bells
AT150F1022
M L 3 3/16 x 2 3/16 x 3 5/8 Button for resetting circuit breaker & metal end bells
208/277/
480 Vac
AT150F1030
M L 3 3/16 x 2 3/16 x 3 5/8 Button for resetting circuit breaker & metal end bells
277 Vac
AT150B1252
F L, Q L, Q A 1 11/16 x 3 1/2 x 1 3/4 Plastic end caps
75 VA
120/208/
240 Vac
AT175F1023
M
L
L
B
3 3/16 x 2 3/16 x 3 15/16 Button for resetting circuit breaker & metal end bells
208/277/
480 Vac
AT175F1031
M L 3 3/16 x 2 3/16 x 3 15/16 Button for resetting circuit breaker & metal end bells
120 Vac
AT88A1005
F L
A 2 15/16 x 2 3/16 x 3 5/16 Internally fused secondary for overload protection208/240 Vac
AT88A1021
F L
480 Vac
AT88A1047
F L
Frequency: A — 60 Hz/50 Hz; B — 60 Hz;
Mounting; C — Conduit ; F — Foot; P — Plate; M — Foot, Conduit, Plate (F models do not come with plate options)
Connections: L — Leadwires (9 in. to 13 in.); Q — Quick Connects; S — Screw Terminals
Approval: UL, CSA
Transformers
Honeywell offers NEMA — National Electrical Manufacturers Association —
standard DC20-1992 and general purpose transformers. These transformers
are available with single or multiple input voltages and with foot, conduit and
plate mounting options. Transformers with circuit breakers that can be manu-
ally reset by pressing a button are also available. Honeywell also designs
transformers for specific environmental requirements and with specialized
termination options.
• NEMA-compliant transformers prevent overcooling, brownout, and burnout.