GE THHQB1140 - 40 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

GE THHQB1140 is a 40A, 120V, 1-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for durability and precise protection, it’s a practical choice for both professional installations and DIY electrical projects that rely on GE-quality components.

Key benefits that matter in the real world

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact in panels subjected to movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both sustained overloads (thermal) and sudden short-circuit surges (magnetic), reducing nuisance trips and protecting wiring and connected loads.
• 1-pole, 40A, 120V configuration is ideal for protecting individual 120V circuits that draw higher current, such as heavy-outlet circuits, dedicated equipment, or high-demand lighting and receptacle runs.
• Panel compatibility is designed to pair with matching OEM GE load centers and panelboards, simplifying replacement and ensuring cohesive system performance.

Where and how you’ll use it

Designed for residential, commercial, and light industrial applications, the THHQB1140 is well suited for protecting single 120V branch circuits within GE panelboards and load centers. Use it to safeguard circuits that require a robust 40-amp protection device without stepping up to multi-pole configurations.

Technical essentials at a glance

• Manufacturer: GE
• Part Number: THHQB1140
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 120 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this bolt-on design stands apart

In panels where reliability and a secure connection matter most, bolt-on breakers like the THHQB1140 offer a mechanically robust alternative to plug-in options. The bolt-on approach minimizes movement-induced loosening over time, helping maintain consistent electrical performance in environments with vibration or frequent door cycles, and during routine panel servicing.

Who benefits most

• Electrical professionals installing or upgrading GE panelboards and load centers
• Property managers and technicians maintaining residential or small commercial electrical systems
• DIY enthusiasts replacing damaged or outdated single-pole protection on 120V circuits

Practical guidance and insights

Think of the THHQB1140 as a focused solution for protecting a single high-demand 120V circuit within a GE-based electrical distribution system. Its thermal-magnetic trip mechanism helps prevent nuisance trips while delivering fast magnetic reaction to short circuits, safeguarding conductors and connected devices. For best results, confirm panel compatibility with GE’s THHQB series and follow standard electrical safety practices during installation.