Description
The Copeland 90-T40M3 is a 40VA control transformer with a multi-tap primary rated for 120, 208, and 240 volts at 50/60Hz, designed to step down line voltage to the 24VAC secondary supply voltage used in residential and light commercial HVAC control circuits. Control transformers are a fundamental power supply component in HVAC systems, providing the 24VAC that powers thermostats, control boards, contactor coils, relay coils, and gas valve operators throughout the control circuit. The 40VA rating defines the transformer's output capacity, determining how many 24V control loads can be simultaneously powered without overloading the secondary winding. The multi-tap primary accommodates 120V, 208V, and 240V supply voltages within a single transformer, eliminating the need to stock separate units for different input voltage configurations and simplifying replacement across a range of residential and commercial equipment installations. Correct VA sizing is critical in HVAC transformer applications, as an undersized transformer will overheat and fail prematurely when total connected control circuit load exceeds its rated output capacity. As an OEM-quality White-Rodgers replacement, the 90-T40M3 is a direct-fit service component for furnaces, air handlers, rooftop units, and related HVAC equipment where 40VA control transformer replacement is required.
Key Features
- 40VA output rating supplies 24VAC control power for thermostats, control boards, contactor coils, relay coils, and gas valve operators
- Multi-tap primary accepts 120V, 208V, and 240V input voltages eliminating need for separate transformers across different supply configurations
- 50/60Hz frequency rating compatible with standard North American and international power supply frequencies
- Steps down line voltage to 24VAC for standard residential and light commercial HVAC control circuit applications
- Correct VA sizing critical for preventing overheating and premature failure from overloaded secondary winding
- Suited for furnaces, air handlers, rooftop units, and related HVAC equipment requiring 40VA control transformer replacement
- OEM-quality White-Rodgers replacement for accurate field identification and direct substitution during HVAC control system service
- Multi-tap primary simplifies replacement parts inventory for service contractors working across varied equipment voltage configurations
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