Rheem-Ruud 46-25107-02 Transformer

When you're out in the field and an HVAC system isn't kicking over, a failed control circuit is often the culprit. The Rheem-Ruud 46-25107-02 Transformer is the heavy-duty solution for stepping down 120V primary voltage to a steady 24V secondary output. Rated at 40VA capacity, this OEM replacement transformer is built to handle the inductive loads of modern contactors, control boards, and multi-stage thermostats. This is not a universal "will-fit" part; it is an authentic Rheem HVAC parts component engineered for specific frame mounting and optimal heat dissipation. Whether you are servicing a residential furnace or a split-system air handler, the 46-25107-02 provides the 50/60Hz frequency stability required to prevent control board chatter and premature component failure. This Class 2 power-limiting transformer features a standard 2-hole channel mount with 3-1/8 inch spacing, ensuring it slots directly into the existing footprint without drilling new holes in the chassis.

• Precise 120V to 24V Conversion: Delivers clean 24VAC power to protect sensitive diagnostic control boards.
• 40VA Power Rating: Sufficient overhead for high-draw systems including advanced zone controllers and heavy-duty contactors.
• Drop-in Replacement: Features 3-1/8" hole spacing for a seamless fit in Rheem and Ruud furnace and air handler cabinets.
• Industry Standards: Class 2 safety rating ensures current limiting protection for the low-voltage side of the circuit.

• Will this replace a 30VA transformer? Yes, you can almost always upgrade to a 40VA unit to provide more stable power for additional low-voltage accessories, provided the physical dimensions match.
• How do I verify a transformer failure? Use a multimeter to check for 120V at the primary leads; if primary power is present but there is 0V at the secondary leads, the internal windings have likely opened.
• What units are compatible with the 46-25107-02? This unit is widely used across Protech, WeatherKing, and Rheem/Ruud gas furnaces and air handlers—always verify the model number on the rating plate.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.