Square D THQL1120 20A Single Pole Circuit Breaker

Product Description

The SQUARE D THQL1120 is a single-pole, plug-in circuit breaker rated at 20 amps and 120/240 volts AC for use in residential and light commercial load centers. It carries a 10 kiloamp interrupting rating, making it suitable for standard branch circuit protection in panelboard applications. The quick-make/quick-break mechanism ensures consistent switching action, and the trip indication flag makes it easy to identify a tripped breaker at a glance. Licensed electricians and electrical contractors install this breaker as part of new construction wiring or panel service and upgrades.

This breaker is intended for plug-in load center installations where a single-pole, 20-amp branch circuit is required. Typical applications include kitchen appliance circuits, bathroom circuits, garage outlets, and general-purpose 120-volt branch circuits. It is suitable for reverse feed configurations and meets GSA compliance requirements. Wire sizes from 14 to 8 AWG are accepted, covering most standard branch circuit conductors used in residential and light commercial work.

Key Features

• 20-amp, single-pole rating for standard 120-volt branch circuit protection
• 10 kiloamp interrupting rating for use in residential and light commercial panels
• Plug-in mounting for quick installation in compatible load centers
• Quick-make/quick-break mechanism for consistent and reliable switching action
• Visible trip indication flag for fast fault identification during panel inspection
• Suitable for reverse feed and GSA-compliant installations

Compatibility

Designed as a plug-in replacement circuit breaker for compatible load centers accepting non-interchangeable, plug-in style single-pole breakers rated at 120/240 volts AC.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify absence of voltage before handling any breaker or bus bar connections. Confirm that the load center accepts non-interchangeable plug-in breakers before installation. Do not exceed the wire size range of 14 to 8 AWG on the breaker terminal.

Technical Specifications

• Current Rating: 20 amps
• Voltage Rating: 120/240 volts AC
• Interrupting Rating: 10 kiloamps
• Number of Poles: 1
• Mounting Type: Plug-In
• Breaker Type: Non-Interchangeable
• Used On: Load Center
• Wire Size Range: 14 to 8 AWG
• Approval: UL E11592

Standard Information

• Brand: SQUARE D
• Manufacturer Part Number: THQL1120