The Mars 50327 is a purpose-built HVAC control transformer that steps down high-voltage primary supply (120, 208, 240, or 480VAC) to a safe 24VAC secondary for control circuits in air conditioning, heating, and refrigeration systems. Compact foot-mount design with wire lead connections makes this a straightforward drop-in replacement for several popular OEM and aftermarket transformers.
Control transformers like the Mars 50327 are the backbone of thermostat and relay control circuits in residential and commercial HVAC equipment. Rated at 50VA, this unit provides enough capacity to power standard 24V control boards, contactors, and thermostat circuits without nuisance tripping or excessive heat buildup.
With a multi-tap primary that accepts 120, 208, 240, or 480VAC input, this transformer suits a wide range of equipment voltages -- from standard residential single-phase to commercial three-phase secondary legs. Whether you are servicing a rooftop package unit, a split system air handler, or a refrigeration condensing unit, the 50327 covers common voltage configurations in a single part.
Accepts 120, 208, 240, or 480VAC input -- one transformer handles multiple equipment voltage configurations without adapters.
Delivers clean 24VAC to control circuits, thermostats, relays, and contactors at up to 50VA continuous capacity.
NEMA Class II construction with low heat rise keeps operating temperatures in check during continuous-duty HVAC service.
Standard foot-mount base and wire lead connections simplify installation in existing brackets and terminal strips.
The Mars 50327 is a confirmed direct replacement for the following parts. If you are pulling one of these out of a unit, the 50327 drops right in:
This transformer is used in control circuits where a low-voltage signal must switch or power relays, contactors, or thermostat boards. Common applications include:
The foot-mount base allows the transformer to be secured to a panel bracket or sheet metal surface using standard hardware. Wire leads connect to line-voltage terminals on the primary side and to the 24V control circuit on the secondary side. Always verify the primary tap matches the supply voltage before energizing.