Smart Electric SE754 Transformer 75VA 408V 24V

Product Description

The SMART ELECTRIC SE754 is a step-down control transformer rated at 75 volt-amperes (VA), designed for low-voltage HVAC control circuits. It accepts a 408-volt primary input and delivers a 24-volt secondary output, making it a direct fit for thermostat and control board wiring in forced-air heating and cooling systems. Licensed HVAC technicians install this transformer as a replacement component when the original unit fails due to overload, wiring fault, or age-related degradation. Its compact design suits standard air handler and furnace control compartments.

The SE754 is used in residential and light commercial HVAC applications where a 24-volt control circuit powers thermostats, zone controllers, relay boards, or other low-voltage accessories. The 75VA rating provides adequate capacity for multi-zone or multi-load control configurations. This transformer is sold as a single unit and is intended for direct replacement of failed transformers in forced-air furnace, air handler, and heat pump control systems.

Key Features

• 408-volt primary voltage supports less common higher-voltage supply configurations
• 24-volt secondary output matches standard HVAC thermostat and control circuit requirements
• 75VA power rating accommodates multi-load low-voltage control applications
• Single-unit sale for direct replacement service calls

Compatibility

Designed as an OEM-style replacement transformer for HVAC systems requiring a 408-volt primary to 24-volt secondary step-down transformer rated at 75VA.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before removing the failed transformer or making any wiring connections. Verify that the replacement transformer VA rating meets or exceeds the total connected load of the control circuit before energizing. Follow all applicable NEC requirements for low-voltage control wiring and panel access.