Schneider Electric (Barber Colman) TC-4122 Remote Bulb Thermostat SPDT

Overview

The Schneider Electric (Barber Colman) TC-4122 is a heavy-duty remote bulb thermostat engineered for precise temperature control in commercial and industrial HVAC applications. With a wide 100°F to 260°F setpoint adjustment range and a robust SPDT switching action, this thermostat is well-suited for unit heaters, duct-mounted applications, fan coil units, and other systems requiring reliable high-temperature sensing.

Key Features

• SPDT (Single-Pole, Double-Throw) switching action for versatile control wiring configurations
• Wide setpoint adjustment range: 100°F to 260°F
• 10-foot armored copper capillary for remote sensing flexibility and durability in demanding environments
• 3/8″ x 4″ copper sensing bulb for accurate and responsive temperature detection
• Adjustable differential: 3 to 16 degrees, factory set at 3 degrees
• NEMA 1 enclosure rating for general-purpose indoor installations
• Barber Colman heritage — trusted commercial-grade construction

Specifications

• Model: TC-4122
• Brand: Schneider Electric (Barber Colman)
• Switch Type: SPDT
• Setpoint Range: 100°F to 260°F
• Capillary Length: 10 feet, armored copper
• Bulb Size: 3/8″ diameter x 4″ length, copper
• Differential: 3 to 16 degrees (factory set at 3 degrees)
• Enclosure: NEMA 1

Applications

The TC-4122 is ideal for a wide range of commercial HVAC and building automation applications, including:

• Unit heater temperature control
• Duct-mounted high-limit or operating control
• Fan coil and air handling unit control
• Industrial process temperature switching
• Boiler and hydronic system auxiliary control