Description
The Lochinvar & A.O. Smith 100208251 is a purpose-built control transformer designed to deliver dependable low-voltage power for HVAC and boiler control circuits. Engineered to meet the demanding requirements of Lochinvar and A.O. Smith heating equipment, this transformer steps down 120V primary power to a 24V secondary output at a 75VA capacity — providing ample power for control boards, thermostats, and other low-voltage components.
Key Specifications
- Primary Voltage: 120V
- Secondary Voltage: 24V
- VA Rating: 75VA
- OEM Part Number: 100208251
- Compatible Brand: Lochinvar & A.O. Smith
Features & Benefits
- OEM-specified replacement transformer for Lochinvar and A.O. Smith heating systems
- 75VA rating supports control boards, thermostats, and zone valves simultaneously
- 120V/24V step-down design matches standard residential and light commercial control circuit requirements
- Direct replacement ensures proper fit and function without modification
- Built to OEM standards for long-lasting, reliable performance
Application
This transformer is an OEM replacement part intended for use in Lochinvar and A.O. Smith boilers and water heaters that require a 120V to 24V step-down transformer for control circuit power. Always verify compatibility with your specific equipment model before installation.







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