Hubbell TB250N001 Control Transformer 250VA 120/240V

Product Description

The HUBBELL TB250N001 is a 250 VA control transformer designed to step voltage down from a 120/240-volt primary to a 12/24-volt secondary. It provides stable low-voltage power to control circuits in HVAC, lighting, and industrial control applications. With a dual primary winding, the transformer accepts either 120 volts or 240 volts depending on how it is wired, and delivers a 12-volt or 24-volt output on the secondary side. Licensed electricians and HVAC technicians are the primary installers for this class of transformer.

This transformer is suited for residential and light commercial control circuit applications. Common uses include powering 24-volt thermostat circuits, zone valve coils, relay coils, and similar low-voltage control loads. The dual-voltage primary makes it adaptable to both standard 120-volt single-phase and 240-volt branch circuits, offering flexibility across a variety of electrical service configurations.

Key Features

• 250 VA rated capacity supports a broad range of control circuit loads
• Dual primary voltage accepts 120 volts or 240 volts
• Dual secondary voltage delivers 12 volts or 24 volts depending on wiring configuration
• Step-down design isolates low-voltage control circuits from line voltage
• Suitable for HVAC thermostat circuits, zone controls, and relay coil applications

Compatibility

Designed as an OEM-style replacement or new-installation control transformer for 24-volt class low-voltage control circuits in residential and light commercial HVAC and electrical control systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize all circuits at the breaker before handling any transformer wiring or connections. Verify primary voltage at the installation site before selecting the correct primary tap, and confirm secondary load does not exceed the 250 VA rating. Overloading the transformer secondary can cause overheating and premature failure.

Technical Specifications

• Apparent Power (VA Rating): 250 VA
• Primary Voltage: 120/240 volts
• Secondary Voltage: 12/24 volts

Standard Information

• Brand: HUBBELL
• Manufacturer Part Number: TB250N001