Square D THQL2140 40A 2-pole Circuit Breaker 120/240V

Product Description

The SQUARE D THQL2140 is a 2-pole, plug-in circuit breaker rated for 40 amps at 120/240 volts AC with a 10 kiloamp interrupting rating. It is designed for installation in compatible load centers and provides overcurrent protection for branch circuits in residential and light commercial electrical systems. The THQL2140 features a quick-make/quick-break mechanism for consistent switching action and common trip bars to ensure both poles open simultaneously under fault conditions. A clearly visible trip indication makes it easy to identify a tripped breaker during troubleshooting. Licensed electricians install this breaker as part of panel work covered under NEC guidelines.

This breaker is suited for residential and light commercial load centers where a 40-amp, 2-pole branch circuit is required. Typical applications include 240-volt circuits for electric dryers, HVAC equipment, water heaters, and similar double-pole loads. The plug-in mounting style allows straightforward installation into compatible load center bus configurations. Wire size compatibility ranges from 8 AWG to 3 AWG, accommodating standard branch circuit conductors used in these applications.

Key Features

• 40-amp, 2-pole configuration for 120/240 volt AC double-pole branch circuits
• 10 kiloamp interrupting rating for fault current protection
• Quick-make/quick-break mechanism for reliable switching action
• Common trip bars ensure simultaneous pole opening on both phases
• Visible trip indication simplifies fault identification during inspection
• UL listed for use in Canada and the United States

Compatibility

Designed as a plug-in, non-interchangeable circuit breaker for compatible load centers accepting the THQL breaker series. Accepts wire sizes from 8 AWG to 3 AWG.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code and all applicable local codes. Always de-energize the load center and verify absence of voltage before handling breakers or conductors. Confirm the load center is rated to accept plug-in breakers of this type before installation. Do not exceed the breaker ampere rating or the wire size range specified for this device.

Technical Specifications

• Current Rating: 40 amps
• Voltage Rating: 120/240 volts AC
• Number of Poles: 2
• Interrupting Rating: 10 kiloamps
• Mounting Type: 1 inch Plug-In
• Wire Size Range: 8 to 3 AWG
• Breaker Type: Non-Interchangeable
• Used On: Load Center
• Approvals: UL Listed (Canada and US)

Standard Information

• Brand: SQUARE D
• Manufacturer Part Number: THQL2140