GE THQL1140 - 40 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

GE THQL1140 is a 40A, 120V, 1-pole plug-in molded-case circuit breaker engineered to protect branch circuits in panelboards and load centers with dependable overcurrent and short-circuit protection. Built for quick installations and reliable performance, it helps keep residential, commercial, and light industrial electrical systems safe and available.

• Fast plug-in connection for rapid installation and easy replacement in compatible GE and OEM panelboards. No special tools required—just snap in and go.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal (overload) sensing with magnetic (short-circuit) response. This dual-action design reduces nuisance trips while maintaining robust safety margins.
• 1-pole, 40A, 120V configuration tailored for individual branch circuits in typical 120V installations, making it a precise fit for circuits that require solid protection without unnecessary disruption.
• Molded-case construction provides reliable mechanical endurance and consistent performance across temperature and voltage variations common in everyday electrical environments.
• OEM compatibility designed to pair with matching OEM load centers and panelboards, ensuring a seamless retrofit or upgrade experience without modification or compatibility concerns.

Why this breaker matters

When a circuit draws more current than it should, or a fault occurs, the THQL1140 interrupts power quickly and cleanly. The result is fewer trip events, reduced wear on wiring, and faster restoration of service once the fault is cleared. This is especially important in spaces with high-demand appliances, lighting loads, or subpanel configurations where reliable protection is critical.

Ideal use cases

• Residential subpanels and main distribution panels needing a dependable 40A protection device for 120V circuits.
• Commercial spaces with dedicated branch circuits that require prompt fault interruption to minimize downtime.
• Light industrial installations where quick replacement and consistent protection are essential for uptime and safety.

Technical snapshot

• GE
• THQL1140
• Thermal-magnetic molded-case circuit breaker
• 40A
• 120V
• 1
• Plug-in
• Branch circuit overcurrent and short-circuit protection

Practical guidance for installing and using

To maximize performance and safety, install this breaker in a panelboard that matches its design and electrical ratings. Confirm the panel’s catalog compatibility before replacement to ensure a clean fit and reliable trip characteristics. Use the unit where rapid replacement is beneficial—its plug-in design minimizes downtime during service or upgrades. Regularly inspect the breaker and surrounding wiring for signs of wear, and replace any damaged components promptly to maintain system integrity.

Who benefits most

• Electrical professionals performing panel upgrades, retrofits, or new installations in homes and light commercial spaces.
• Facility managers seeking dependable, easy-to-replace protection for high-demand 120V circuits.
• Do-it-yourself installers valuing straightforward plug-in replacements and OEM-compatible performance.

With the GE THQL1140, you get precise 40-amp, 120-volt protection in a plug-in format that’s built to slot into compatible panelboards and load centers without compromise. It’s a practical, dependable choice for safeguarding branch circuits wherever reliable electrical protection matters most.