Specifications
Transformers
70-6910 175
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AT72 NEMA Standard Transformer
24V control circuit step-down transformer designed to power any
24V control system, including thermostats, gas valves and relays.
• Override protection provided.
• Color-coded leadwires for primary connections.
• Energy limiting, meets NEMA Standard DC20-1992.
• Transformer is marked NEMA Type D.
• Meets NEC Class 2 not wet, Class 3 wet and U.L. 1585
requirements.
• Mount within proper enclosure.
Temperature Rating: -20 F to +105 F (-29 C to +41 C)
Frequency: 50 Hz; 60 Hz
NEMA Rating: Type D
Approvals:
Canadian Standards Association: Certified
N.E.C. NEC Approved.
Underwriters Laboratories, Inc. UL Component Recognized.
Product Number
Electrical Ratings
Electrical
Connections (main)
Mounting
Dimensions, Approximate
Voltage
Output Primary Secondary (inch) (mm)Primary Secondary
AT72D1006 120 Vac 26.5 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
(2) screw
terminals
4 x 4 in. plate-mounted, protruding
into junction box
3 7/32 in. high x
2 7/32 in. wide x
(1 1/16 into plate x
2 in. above plate)
deep
81.8 mm high x
56.4 mm wide x
(27 mm into box x
50.8 mm above
box) deep
AT72D1188 120 Vac 26.5 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
9 in.
leadwires
4 x 4 in. plate mounted without
protruding into junction box.
3 7/32 in. high x
2 7/32 in. wide x
2 15/16 in. deep
81.8 mm high x
56.4 mm wide x
74.6 mm deep
• AT72D1683 120 Vac 26.5 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
(2) screw
terminals
Can be foot mounted, plate
mounted on 4 x 4 in., 4 in. octagon,
or 2 x 4 in. electrical boxes
(transformer all above plate or 3/4
above plate); or clamp mounted via
a junction box knockout.
3 7/32 in. high x
2 7/32 in. wide x
3 1/16 in. deep
81.8 mm high x
56.4 mm wide x
77.8 mm deep
• AT72D1691 208 Vac,
240 Vac
26.5 V.O.C. 24 Vac
at 40 VA
9 in.
leadwires
(2) screw
terminals
Can be foot mounted, plate
mounted on 4 x 4 in., 4 in. octagon,
or 2 x 4 in. electrical boxes
(transformer all above plate or 3/4
above plate); or clamp mounted via
a junction box knockout.
3 7/32 in. high x
2 7/32 in. wide x
3 1/16 in. deep
81.8 mm high x
56.4 mm wide x
77.8 mm deep
* TRADELINE models • SUPER TRADELINE models