The Resideo AT40A1121 is a 40VA step-down transformer for powering 24V AC control systems in residential and light commercial HVAC applications. Features 120V primary input, 24V secondary output, 9-inch color-coded lead wires, and foot-mount configuration. UL component recognized and CSA listed; meets NEC Class 2 not wet, Class 3 wet requirements per NEMA Standard DC-20.
Resideo AT40A1121 40VA Transformer 120V-24V Foot Mount
Resideo
$37.95
In Stock — 10+ available
- OEM / cross-reference
- AT40A1006, AT40A1014, AT40A1030, AT40C1004
- Replaces
- AT40C1004, AT40A1014
- Fits brands
- Honeywell, Invensys, Erie
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Resideo
Resideo AT40A1121 40VA Transformer 120V-24V Foot Mount
- SKU:
- AT40A1121
- Product Type:
- Step-Down Transformer
- Subcategory:
- Control System Transformer
- Application:
- Residential/Commercial
- System Type:
- Furnace, Boiler, Air Handler, Heat Pump, Package Unit
- Installation Type:
- OEM Replacement
- Voltage:
- 120V primary, 24V secondary
- Voltage Class:
- Low Voltage
- Phase:
- Single Phase
- Mounting Type:
- Foot Mount
- Fuel Type:
- Electric
- Connection Type:
- Lead Wire
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