Description
The York S1-3300-3861 is a foot-mount control transformer engineered to deliver dependable, low-voltage power for HVAC control circuits. Designed as a genuine York OEM replacement part, this transformer steps down a 240V primary supply to a 24V secondary output at a 40VA capacity — providing the consistent, clean power that thermostats, contactors, relays, and other control components require for safe and accurate system operation.
The foot-mount design allows for secure, stable installation directly onto equipment panels or mounting surfaces, minimizing vibration and ensuring long-term reliability in demanding HVAC environments. As an OEM-specified component, it integrates seamlessly into compatible York systems, making it the preferred choice for service technicians and contractors performing warranty-compliant repairs and replacements.
Key Features
- Primary voltage: 240V
- Secondary voltage: 24V
- VA rating: 40VA
- Foot-mount design for secure panel installation
- Genuine York OEM replacement part
- Compatible with York HVAC systems requiring 24V control circuit power
- SKU: S1-3300-3861
Applications
- York residential and light commercial HVAC systems
- Control circuit power supply for thermostats, relays, and contactors
- OEM replacement in York furnaces, air handlers, and packaged units







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