General Electrics THHQB1120ST1 - 20 A, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the General Electric THHQB1120ST1, a purpose-built 20A, 1-pole bolt-on molded case circuit breaker designed to shield your electrical system from overcurrent and short circuits. Crafted for reliable performance in panelboards and loadcenters, this breaker is tailored for residential, commercial, and light industrial applications where dependable protection and solid connections matter most.

• Secure bolt-on mounting delivers a rigid, vibration‑resistant bus connection, reducing the risk of loosened contacts in environments with movement or frequent access to panels.
• Thermal-magnetic trip unit provides stable, repeatable protection for both overloads and short circuits, helping to prevent nuisance trips while safeguarding wiring and devices.
• 1-pole, 20A rating targets individual branch circuits with precise protection, supporting clean, predictable operation of lighting, outlets, and controlled loads.
• OEM-compatible for panelboards and loadcenters designed to work with matching GE and OEM equipment, simplifying replacements and upgrades without compatibility concerns.
• Versatile across settings ideal for residential panels, commercial distribution, and light industrial installations where compact, robust overcurrent protection is essential.

Why choose the THHQB1120ST1 for your electrical protection plan

• Designed for environments where vibration or panel accessibility could loosen connections; bolt-on mounting preserves a solid bus linkage.
• Thermal-magnetic technology delivers responsive protection: the thermal element handles gradual overloads, while the magnetic element responds quickly to short circuits.
• Explicitly sized for 20A circuits, helping you segment loads efficiently and reduce the risk of overloading individual branches.
• Compatibility with OEM loadcenters and panelboards means fewer surprises during installation or panel refresh projects.

Technical snapshot

Type: Thermal-magnetic molded case circuit breaker • Amperage: 20A • Poles: 1 • Mounting style: Bolt-on • Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical choice for electricians and facilities managers who value a durable, straightforward solution that coordinates with existing panel architecture. Use it to upgrade or replace aging 20A circuits, retrofit panels, or expand protection in spaces where a reliable bolt-on option is preferred over plug-in alternatives. Add the THHQB1120ST1 to your panel strategy for consistent, predictable protection that stands up to everyday use.