General Electrics THHQB2140ST1 - 40 A, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the General Electric THHQB2140ST1—a 40A, 2-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed to perform consistently across the demanding environments of residential, commercial, and light industrial applications, this breaker delivers reliable protection where it matters most.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping to maintain stable electrical contact and reduce nuisance trips in vibration-prone installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection. The thermal element responds to sustained overloads, while the magnetic element promptly trips on high-magnitude short circuits, safeguarding protected circuits with dependable accuracy.
• OEM compatibility is built in—designed to pair with matching GE load centers and panelboards, ensuring a clean fit, reliable operation, and streamlined replacement when a component reaches end of life.

Technical snapshot

• Manufacturer: General Electrics
• Part Number: THHQB2140ST1
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications

This 40A, 2-pole unit is well-suited for protecting individual branch circuits within GE panelboards and load centers used in:

• Residential electrical panels for kitchen circuits, HVAC feeds, water heaters, and multi-room subpanels
• Commercial lighting, receptacle, and small equipment circuits that require reliable tripping behavior
• Light industrial feeders and machinery lines where durable, vibration-resistant connections matter

What problems it solves

• Protects wiring and devices from overcurrent and short circuits, helping to prevent fire hazards and equipment damage
• Delivers predictable performance in environments with vibration or load fluctuations thanks to secure bolt-on mounting
• Provides a proven replacement path within GE OEM systems, reducing retrofit risk and ensuring compatibility with existing panelboards

Installation and maintenance considerations

Leverage the bolt-on mounting for a solid connection to the bus, paired with GE’s compatible panelboards for trouble-free replacement and ongoing reliability. This unit is designed for use in systems where a 40A, 2-pole thermal-magnetic protection strategy is appropriate, offering straightforward integration with matching GE equipment.

How it compares to alternatives

Compared to generic, non-OEM replacements, the THHQB2140ST1 is purpose-built for GE panelboards and load centers, ensuring:

• Precise fit and reliable mechanical contact to the bus
• Consistent trip characteristics aligned with GE’s engineering standards
• Streamlined maintenance with a common form factor designed for GE families of equipment

In the box and beyond

Designed for straightforward integration into existing GE electrical systems, this breaker supports long-term reliability for critical circuits and helps ensure continuous operation in daily, mission-critical applications.

Ready to upgrade or replace? The THHQB2140ST1 from AmpState provides the precise protection you need in a GE-compatible package. Verify your GE panelboard compatibility, then install with confidence to maintain robust branch circuit protection across your electrical system.