
Resideo AT87A1106 Transformer
The Resideo AT87A1106 Transformer is a heavy-duty 48VA transformer engineered for multi-tap versatility in commercial and residential HVACR service. Built to handle 120V/208V/240V primary input, this Super Tradeline component drops voltage to a stable 26.5V secondary (24.0V nominal under load), making it a reliable choice for powering 24V control circuits, contactors, and high-draw zone systems. The unit features NEMA Type E construction and integrated overload protection with primary winding burnout prevention to protect sensitive downstream electronics from catastrophic failure during a short circuit.
Installation is straightforward for any field technician, as the AT87A1106/U supports both foot mounting and 4x4 inch plate mounting. The primary connections utilize 13-inch color-coded leadwires for rapid identification in the junction box, while the output side features dual screw terminals for secure low-voltage wiring. Designed for durability in mechanical rooms, it operates within a wide temperature range of -20°F to +105°F and meets UL 1585 and NEC Class 2 requirements.
Key Benefits- Universal Compatibility: Multi-tap primary supports 120, 208, and 240 VAC, reducing the need to carry multiple single-voltage SKUs on the truck.
- High Power Output: Rated at 48 VA, providing ample headroom for modern electronic thermostats and multiple relay coils.
- Enhanced Safety: Built-in primary winding burnout protection prevents fire hazards and equipment damage in the event of an electrical fault.
- Flexible Installation: Universal mounting options allow for secure placement on flat surfaces or standard 4x4 electrical boxes.
Can I use this transformer to replace a 40VA unit?
Yes, the 48VA rating provides a higher capacity than a standard 40VA transformer, making it a suitable and often superior upgrade for high-draw control systems.
What does the 'NEMA Type E' rating signify for my installation?
The Type E marking indicates it meets specific NEMA standards for open-style control transformers, ensuring it is built to the mechanical and electrical tolerances required for HVACR applications.
Is this unit compatible with both 50Hz and 60Hz cycles?
The Resideo AT87A1106 is rated for 50/60 Hz, allowing for 24V secondary stability across varying grid frequencies.
This item is not eligible for free shipping.
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.
Original: $48.91
-65%$48.91
$17.12Resideo AT87A1106 Transformer
The Resideo AT87A1106 Transformer is a heavy-duty 48VA transformer engineered for multi-tap versatility in commercial and residential HVACR service. Built to handle 120V/208V/240V primary input, this Super Tradeline component drops voltage to a stable 26.5V secondary (24.0V nominal under load), making it a reliable choice for powering 24V control circuits, contactors, and high-draw zone systems. The unit features NEMA Type E construction and integrated overload protection with primary winding burnout prevention to protect sensitive downstream electronics from catastrophic failure during a short circuit.
Installation is straightforward for any field technician, as the AT87A1106/U supports both foot mounting and 4x4 inch plate mounting. The primary connections utilize 13-inch color-coded leadwires for rapid identification in the junction box, while the output side features dual screw terminals for secure low-voltage wiring. Designed for durability in mechanical rooms, it operates within a wide temperature range of -20°F to +105°F and meets UL 1585 and NEC Class 2 requirements.
Key Benefits- Universal Compatibility: Multi-tap primary supports 120, 208, and 240 VAC, reducing the need to carry multiple single-voltage SKUs on the truck.
- High Power Output: Rated at 48 VA, providing ample headroom for modern electronic thermostats and multiple relay coils.
- Enhanced Safety: Built-in primary winding burnout protection prevents fire hazards and equipment damage in the event of an electrical fault.
- Flexible Installation: Universal mounting options allow for secure placement on flat surfaces or standard 4x4 electrical boxes.
Can I use this transformer to replace a 40VA unit?
Yes, the 48VA rating provides a higher capacity than a standard 40VA transformer, making it a suitable and often superior upgrade for high-draw control systems.
What does the 'NEMA Type E' rating signify for my installation?
The Type E marking indicates it meets specific NEMA standards for open-style control transformers, ensuring it is built to the mechanical and electrical tolerances required for HVACR applications.
Is this unit compatible with both 50Hz and 60Hz cycles?
The Resideo AT87A1106 is rated for 50/60 Hz, allowing for 24V secondary stability across varying grid frequencies.
This item is not eligible for free shipping.
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.
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Description
The Resideo AT87A1106 Transformer is a heavy-duty 48VA transformer engineered for multi-tap versatility in commercial and residential HVACR service. Built to handle 120V/208V/240V primary input, this Super Tradeline component drops voltage to a stable 26.5V secondary (24.0V nominal under load), making it a reliable choice for powering 24V control circuits, contactors, and high-draw zone systems. The unit features NEMA Type E construction and integrated overload protection with primary winding burnout prevention to protect sensitive downstream electronics from catastrophic failure during a short circuit.
Installation is straightforward for any field technician, as the AT87A1106/U supports both foot mounting and 4x4 inch plate mounting. The primary connections utilize 13-inch color-coded leadwires for rapid identification in the junction box, while the output side features dual screw terminals for secure low-voltage wiring. Designed for durability in mechanical rooms, it operates within a wide temperature range of -20°F to +105°F and meets UL 1585 and NEC Class 2 requirements.
Key Benefits- Universal Compatibility: Multi-tap primary supports 120, 208, and 240 VAC, reducing the need to carry multiple single-voltage SKUs on the truck.
- High Power Output: Rated at 48 VA, providing ample headroom for modern electronic thermostats and multiple relay coils.
- Enhanced Safety: Built-in primary winding burnout protection prevents fire hazards and equipment damage in the event of an electrical fault.
- Flexible Installation: Universal mounting options allow for secure placement on flat surfaces or standard 4x4 electrical boxes.
Can I use this transformer to replace a 40VA unit?
Yes, the 48VA rating provides a higher capacity than a standard 40VA transformer, making it a suitable and often superior upgrade for high-draw control systems.
What does the 'NEMA Type E' rating signify for my installation?
The Type E marking indicates it meets specific NEMA standards for open-style control transformers, ensuring it is built to the mechanical and electrical tolerances required for HVACR applications.
Is this unit compatible with both 50Hz and 60Hz cycles?
The Resideo AT87A1106 is rated for 50/60 Hz, allowing for 24V secondary stability across varying grid frequencies.
This item is not eligible for free shipping.
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.












