Name: Resideo AT150F1022/U 50VA Multi Mount Transformer
Brand: Resideo
SKU: HONE-AT150F1022/U
Price: 61.73 USD
Availability: InStock

Resideo AT150F1022/U 50VA Multi Mount Transformer

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Frequency	60 Hz
Electrical Ratings	Primary voltage--120 Vac, 208 Vac, 240 Vac; Secondary voltage--27.5 V.O.C.
Mounting	Includes 1/2 14 NPSM conduit connector and lock nut for mounting on plate or panel (not included) with 7/8 in. knockout, and feet for surface mount.
Includes	Metal end bells and button for manually resetting the breaker
Dimensions	3 3/16 in. high x 2 3/16 in. wide x 3 5/8 in. deep
UL	UL Listed: File no. E14881, Guide no. XOKV.
CSA	Certified: File No. LR95329-18
Temperature Range (F)	-20 F to +105 F
Electrical Connections (Primary)(in.)	9 in. leadwires
Electrical Connections (Secondary)(in.)	9 in. leadwires
Electrical Ratings, Output	24 Vac at 50 VA

Installation Instructions for AT150F, AT175F Universal Circuit Breaker Transformers PDF ↗
Maintenance/Product Reference Materials-Residential Combustion Application Selection and C PDF ↗

The AT150F1022 is a control transformer from Resideo (Honeywell Home), 50 VA, multi mount.

Almost every heating and cooling control runs on 24 volts, and the transformer is what makes it. It takes line voltage in and delivers the low-voltage supply that the thermostat, the zone valves, the relays and the gas valve all share.

Size it by VA, not by voltage. VA is the load the transformer can carry, and every device on the control circuit adds to it — a zone valve pulls current while it drives, a relay coil holds current the whole time it is energized, and a Wi-Fi thermostat draws continuously. A transformer sized for the original equipment will not carry the same system after two zones and a smart stat have been added, and the symptom is intermittent: things work alone and fail together.

Mounting matters more than it looks. The transformer has to land where the enclosure has room and where the leads reach, and a foot-mount body will not sit in a knockout that was made for a plate mount.

Brand: Resideo (Honeywell Home)
Manufacturer Part #: AT150F1022/U
Type: Control transformer
Rating: 50 VA
Secondary: 24 Vac
Mounting: Multi Mount
UPC: 085267151115
Category: Transformers

Full Specifications

Application	Power To 24 VAC Circuits In Heating and Cooling Systems
NEMA Rating	No
Primary Connection Size	9 in, 229 mm
Primary Input Voltage	120/208/240 V ac
Secondary Connection Size	9 in, 229 mm
Secondary Connection Type	Leadwires
Secondary Open Circuit Voltage	27 V.O.C.
VA Rating	50 VA
Frequency	60 Hz
Approvals and Standards	UL Listed: File no. E14881, Guide no. XOKV, Certified: File No. LR95329-18
Includes	1/2-14 NPSM conduit connector, Lock Nut, Mounting Feet
Color	Metallic
Ambient Operating Temperature (Max)	105 °F, 41 °C
Ambient Operating Temperature (Min)	-20 °F, -29 °C
Product Height	3.19 in
Product Length	2.19 in
Product Width	3.63 in