Robertshaw 620-502 Transformer
The Robertshaw 620-502 Control Transformer is a 50 VA HVAC transformer designed to supply 24 VAC control power from 120, 208, or 240 VAC primary power. This multi-tap HVAC transformer is used in compatible heating, cooling, and control applications requiring low-voltage power for thermostats, relays, contactors, and other 24-volt control devices.
When replacing a failed 24V control transformer, verify the incoming voltage, transformer VA capacity, secondary voltage, mounting arrangement, and wiring connections. The 50 VA rating provides approximately 2.08 amps at 24 VAC under rated conditions. Select the correct primary connection for the available supply voltage and follow the equipment wiring diagram.
The Robertshaw 620-502 replacement transformer is intended for technicians servicing compatible HVAC control circuits. Before installation, inspect the circuit for shorts or excessive loads that may have caused the original transformer to fail.
Key Benefits
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50 VA transformer capacity for compatible HVAC control circuits.
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120/208/240 VAC multi-voltage primary for different supply voltages.
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24 VAC secondary output for low-voltage controls.
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Suitable for compatible thermostat, relay, and contactor circuits.
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Supports replacement of failed HVAC control transformers.
Common Questions
Q: What is the output voltage of the Robertshaw 620-502?
A: The specified secondary output is 24 VAC, with a rated capacity of 50 VA.
Q: Can this transformer replace a 40 VA HVAC transformer?
A: Potentially, provided the voltage ratings, wiring, mounting, and equipment requirements are compatible. Confirm the application before substitution.
Q: Why does an HVAC control transformer fail?
A: Common causes include shorted control wiring, overloaded circuits, incorrect primary voltage connections, and electrical faults in connected components.
Disclaimer
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.
620-502 is the cross for Y63T22-0