Resideo - Honeywell Home AT140B1206 General Purpose Transformer

The AT140B1206 General Purpose Transformer from Resideo - Honeywell Home delivers reliable power conversion for a variety of HVAC control systems. With a 120V AC input and a 24V AC output, it provides clean, steady voltage at 60 Hz to energize thermostats, relays, and control boards. Built for everyday reliability, this transformer handles up to 40 VA and is designed for compact installations in tight control panels.

Its compact footprint measures 3-1/2 in W x 1-3/4 in D x 1-11/16 in H, and it includes a mounting foot and plastic end cap for simple mounting and secure wiring. UL and CSA approvals ensure safety and compatibility with standard building codes.

Key features:

• Input: 120V AC; Output: 24V AC
• Frequency: 60 Hz
• Power rating: 40 VA
• Compact dimensions: 3-1/2 in W x 1-3/4 in D x 1-11/16 in H
• Includes mounting foot and plastic end cap
• Approved for heating/cooling control systems; UL and CSA listed