
Supco SXT106 Transformer
The Supco SXT106 is a versatile 40VA control transformer engineered for the rigorous demands of commercial and residential HVACR service. This multi-mount transformer provides a stable 24VAC secondary output from multiple primary voltage taps, including 120V, 208V, and 240V, making it an essential truck-stock item for service technicians. Designed as a direct replacement for AT140A1018, it features a Class 2 rating for safe integration into furnace control circuits, air handlers, and refrigeration systems. The multi-mount configuration allows for foot, plate, or hub mounting, ensuring compatibility with existing chassis configurations. This high-efficiency Step-Down Transformer is built specifically for driving contactors, relays, and digital thermostats without the bulk of larger industrial alternatives. Its robust construction ensures consistent voltage regulation under load, preventing nuisance trips in sensitive electronic controllers and ensuring reliable HVAC voltage conversion in the field.
Key Benefits for HVACR Technicians
- Universal Compatibility: Multi-tap primary leads (120/208/240 VAC) reduce the need to carry multiple SKUs for different job site voltages.
- Flexible Installation: Support for multi-mount applications allows for quick replacement in tight control panels and air handler cabinets.
- Direct Cross-Reference: Optimized to replace Honeywell AT140A1018 and other common 40VA models with identical footprints.
- Optimized Load Handling: Provides a steady 24V secondary output, ideal for powering modern smart thermostats and high-draw contactor coils.
Technical Questions & Answers
Is the Supco SXT106 internally fused?
No, this model does not include a built-in breaker or fuse. It is a standard non-protected transformer. For circuits prone to shorts, we recommend installing an external inline fuse on the secondary side to protect the 24V control loop.
Can I use this to replace a 20VA or 30VA transformer?
Yes, you can use a 40VA transformer to replace one with a lower VA rating, provided the primary and secondary voltages match. Increasing VA capacity provides more "overhead" for additional accessories like zone dampers or humidifiers.
What mounting options are supported?
The SXT106 features a multi-mount design, which includes a 4x4-inch mounting plate, a threaded hub for 1/2-inch knockouts, and standard foot-mount slots for screw-down applications.
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.
Supco SXT106 Transformer
The Supco SXT106 is a versatile 40VA control transformer engineered for the rigorous demands of commercial and residential HVACR service. This multi-mount transformer provides a stable 24VAC secondary output from multiple primary voltage taps, including 120V, 208V, and 240V, making it an essential truck-stock item for service technicians. Designed as a direct replacement for AT140A1018, it features a Class 2 rating for safe integration into furnace control circuits, air handlers, and refrigeration systems. The multi-mount configuration allows for foot, plate, or hub mounting, ensuring compatibility with existing chassis configurations. This high-efficiency Step-Down Transformer is built specifically for driving contactors, relays, and digital thermostats without the bulk of larger industrial alternatives. Its robust construction ensures consistent voltage regulation under load, preventing nuisance trips in sensitive electronic controllers and ensuring reliable HVAC voltage conversion in the field.
Key Benefits for HVACR Technicians
- Universal Compatibility: Multi-tap primary leads (120/208/240 VAC) reduce the need to carry multiple SKUs for different job site voltages.
- Flexible Installation: Support for multi-mount applications allows for quick replacement in tight control panels and air handler cabinets.
- Direct Cross-Reference: Optimized to replace Honeywell AT140A1018 and other common 40VA models with identical footprints.
- Optimized Load Handling: Provides a steady 24V secondary output, ideal for powering modern smart thermostats and high-draw contactor coils.
Technical Questions & Answers
Is the Supco SXT106 internally fused?
No, this model does not include a built-in breaker or fuse. It is a standard non-protected transformer. For circuits prone to shorts, we recommend installing an external inline fuse on the secondary side to protect the 24V control loop.
Can I use this to replace a 20VA or 30VA transformer?
Yes, you can use a 40VA transformer to replace one with a lower VA rating, provided the primary and secondary voltages match. Increasing VA capacity provides more "overhead" for additional accessories like zone dampers or humidifiers.
What mounting options are supported?
The SXT106 features a multi-mount design, which includes a 4x4-inch mounting plate, a threaded hub for 1/2-inch knockouts, and standard foot-mount slots for screw-down applications.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Supco SXT106 is a versatile 40VA control transformer engineered for the rigorous demands of commercial and residential HVACR service. This multi-mount transformer provides a stable 24VAC secondary output from multiple primary voltage taps, including 120V, 208V, and 240V, making it an essential truck-stock item for service technicians. Designed as a direct replacement for AT140A1018, it features a Class 2 rating for safe integration into furnace control circuits, air handlers, and refrigeration systems. The multi-mount configuration allows for foot, plate, or hub mounting, ensuring compatibility with existing chassis configurations. This high-efficiency Step-Down Transformer is built specifically for driving contactors, relays, and digital thermostats without the bulk of larger industrial alternatives. Its robust construction ensures consistent voltage regulation under load, preventing nuisance trips in sensitive electronic controllers and ensuring reliable HVAC voltage conversion in the field.
Key Benefits for HVACR Technicians
- Universal Compatibility: Multi-tap primary leads (120/208/240 VAC) reduce the need to carry multiple SKUs for different job site voltages.
- Flexible Installation: Support for multi-mount applications allows for quick replacement in tight control panels and air handler cabinets.
- Direct Cross-Reference: Optimized to replace Honeywell AT140A1018 and other common 40VA models with identical footprints.
- Optimized Load Handling: Provides a steady 24V secondary output, ideal for powering modern smart thermostats and high-draw contactor coils.
Technical Questions & Answers
Is the Supco SXT106 internally fused?
No, this model does not include a built-in breaker or fuse. It is a standard non-protected transformer. For circuits prone to shorts, we recommend installing an external inline fuse on the secondary side to protect the 24V control loop.
Can I use this to replace a 20VA or 30VA transformer?
Yes, you can use a 40VA transformer to replace one with a lower VA rating, provided the primary and secondary voltages match. Increasing VA capacity provides more "overhead" for additional accessories like zone dampers or humidifiers.
What mounting options are supported?
The SXT106 features a multi-mount design, which includes a 4x4-inch mounting plate, a threaded hub for 1/2-inch knockouts, and standard foot-mount slots for screw-down applications.
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.












