Description
Lochinvar & A.O. Smith 100276897 Control Transformer Overview
The Lochinvar & A.O. Smith 100276897 is an OEM-grade control transformer engineered to deliver stable, low-voltage power for boiler and water heater control circuits. With a dual primary voltage rating of 120/240V and a 24V secondary output, this transformer is designed for broad compatibility across residential and light commercial hydronic heating applications. Its 150VA capacity provides ample power for control boards, relays, and other 24V components, while the 50/60Hz frequency rating ensures reliable operation on both North American electrical systems.
Key Features
- Primary Voltage: 120/240V AC
- Secondary Voltage: 24V AC
- VA Rating: 150VA
- Frequency: 50/60Hz
- OEM replacement part for Lochinvar and A.O. Smith boilers and water heaters
- Provides dependable, regulated low-voltage power to control circuits
- Dual primary voltage design for flexible installation compatibility
Application
This transformer is a direct OEM replacement part for select Lochinvar and A.O. Smith boiler and water heater models. It supplies the 24V control circuit voltage required to power thermostats, aquastats, zone controls, and other system components. Always verify compatibility with your specific unit model before installation.
Why Choose OEM Replacement Parts?
Using genuine OEM replacement components like the Lochinvar & A.O. Smith 100276897 ensures proper fit, function, and system reliability. OEM parts are manufactured to the same specifications as the original equipment, helping to maintain system efficiency and protect your warranty.







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