Power Supplies

AT150F, AT175F

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Product Bar End

AT150F, AT175F

Class 2 Control Transformers with Breaker AT150F, AT175F

Class 2 Control Transformers with Breaker


The Honeywell Model AT150F and AT175F transformers provide power to nominal 24 VAC circuits in heating/cooling systems. Although the transformers are typically used in heating/cooling systems, they can be used in any application that does not exceed the load ratings. The transformers include a manual reset button for resetting the circuit breaker. They also meet NEC Class 2 "not wet" and Class 3 "wet" requirements and are UL listed under UL1585. These transformers can be foot or hub mounted.


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QtyModelDescriptionIn StockList PriceInternet Price
AT150F1022 50VA TRANS 120/208/240V C BRK In Stock55.9844.78
AT150F1030 50VA 208/277/480V TRANS CB In Stock58.3146.65
AT175A1008 TRANSFORMER 75VA 120/208/240 INFO79.0063.20
AT175F1023 75VA 120/208/240V TRANS CB In Stock87.4869.98
AT175F1031 75VA 208/277/480V TRANS CB In Stock98.5778.86
AT40A1121 TRADELINE 120V 2 SETS FT MNT INFO67.0053.60
AT41A1012 TRANSFORMER 120/24V 40VA INFO66.0052.80
AT72D1683 TANSFORMER 40VA 120V INFO56.0044.80
AT72D1691 TRANSFORMER 40VA 208/240V INFO69.0055.20
AT87A1106 TRANSFORMER 48VA 120/208/240 INFO74.0059.20


No accessories found
  • Multi-tap primary connections
  • Color-coded lead wires
  • Manually resettable circuit breaker
  • Meets NEC Class 2 "not wet" and Class 3 "wet" transformer requirements

Primary Voltage:120/208/240 VAC, 208/277/480 VAC

Secondary Voltage:24 VAC

Frequency:60 Hz

VA Rating:AT150F: 50 VA, AT175F:75 VA

Mounting:Foot or hub

Conduit Connection:1/2" male NPT

Lead Wires:9" (22.8 cm), color coded

Weight:3 lb (1.36 Kg)

Approvals:UL1585, UL5085-3 File #E14881, CSA File #LR95329-18 NEC Class 2 "not wet", Class 3 "wet"

Warranty:1 year