Description
Honeywell AT20B1056 Control Transformer Overview
The Honeywell AT20B1056 is a reliable HVAC control transformer engineered to step down 120V primary voltage to a 24V secondary output at 20VA. Designed for commercial and residential HVAC control applications, this transformer provides a stable, low-voltage power supply for thermostats, relays, contactors, and other 24V control circuits. Its rugged channel frame mounting design makes installation straightforward in a wide variety of equipment panels and enclosures.
Key Features
- 120V primary to 24V secondary voltage transformation
- 20VA power rating — suitable for standard HVAC control circuits
- Channel frame mounting for easy, secure installation in panels and enclosures
- NEMA-rated construction for enhanced durability and environmental protection
- 9″ pre-attached lead wires for flexible wiring connections
- Compact, low-profile design fits standard equipment configurations
Specifications
- SKU: AT20B1056
- Brand: Honeywell
- Primary Voltage: 120V
- Secondary Voltage: 24V
- VA Rating: 20VA
- Mounting Type: Channel Frame
- Enclosure Rating: NEMA Rated
- Lead Wire Length: 9 inches
Applications
The AT20B1056 is ideal for powering 24V control circuits in residential and light commercial HVAC systems, including thermostats, zone valves, relay coils, and other low-voltage control components. Its channel frame mounting style is well-suited for installation inside furnaces, air handlers, and electrical control panels.
Why Choose the Honeywell AT20B1056?
Honeywell’s AT Series transformers are trusted throughout the HVAC industry for their consistent performance and long service life. The NEMA-rated housing protects internal components from dust and moisture, while the pre-wired 9″ leads reduce installation time. Whether replacing a failed transformer or specifying a new installation, the AT20B1056 delivers dependable 24V control power you can count on.
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