Reliable 40VA (volt-amp) HVAC control transformer – steps down standard 120V household line voltage to safe, efficient 24V low-voltage power, essential for powering thermostats, zone valves, relays, gas valves, solenoid valves, control circuits and accessories in heating, ventilation and air conditioning (HVAC) systems. Direct replacement or compatible upgrade for Trane furnace models, air handlers, heat pumps and many other brands requiring a 120V primary to 24V secondary transformer.
Key Features:
- 40VA power rating – provides sufficient capacity for most residential HVAC control circuits (thermostat, relays, valves, humidifiers, etc.) – handles typical loads without overheating or voltage drop.
- Input/Output – Primary: 120V AC (single voltage); Secondary: 24V AC – standard wiring for easy replacement in existing systems.
- Class 2 safety rating – UL-listed or CSA-certified (in most variants) for low-voltage control use – built-in thermal protection and overload safeguards prevent fire hazards or damage.
- Durable construction – heavy-duty steel core and coil with epoxy encapsulation or resin potting – resists vibration, humidity and temperature extremes common in furnace/air handler compartments.
- Foot or hub mounting – multiple mounting options (foot mounts on base or threaded hub for conduit) – fits most furnace control panels, junction boxes or air handler cabinets.
- Color-coded wires – standard 6–8 inch leads (black/white primary, blue/red or yellow secondary) – simplifies installation and reduces wiring errors.
- Compact size – typical dimensions ≈3–4 inches tall × 2–3 inches wide – fits tight spaces in older Trane units or modern furnaces without clearance issues.
Compatibility & Use:
- Direct replacement or equivalent for Trane part numbers like 4011F-3, BASO transformers or similar 40VA 120V/24V models in Trane furnaces, air handlers and heat pumps.
- Works with most residential HVAC systems requiring 24V control power (American Standard, Carrier, Lennox, Goodman, Rheem, York, etc.).
- Common applications: thermostat power, zone valve control, gas valve solenoid, humidifier solenoid, relay coils, blower relays or electronic air cleaners.
Ideal For:
- Replacing failed or weak transformers in Trane furnaces/HVAC equipment
- Upgrading older systems with reliable 40VA power supply
- HVAC technicians or DIY homeowners performing repairs
- Ensuring stable 24V control voltage for consistent thermostat operation
- Preventing low-voltage issues causing intermittent heating/cooling failures
This 4011F-3 compatible 40VA 120V-to-24V transformer offers dependable, safe low-voltage power in a compact, durable package – a straightforward, cost-effective replacement or upgrade for Trane and other HVAC systems to restore reliable operation and prevent control circuit problems. Easy wiring and installation with standard color-coded leads. Always verify voltage and VA rating match your equipment before installation.