General Electrics THHQB1115ST1 - 15 A, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the General Electrics THHQB1115ST1 — a purpose-built 15A, 1-pole bolt-on molded case circuit breaker that brings locker-room reliability to your panelboard or load center. Engineered for steady performance in daily electrical loads, this unit delivers durable protection against overcurrent and short-circuit events without compromising panel stability or service continuity.

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays tight even in busy electrical environments, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit: combines overload sensing (thermal) with instantaneous short-circuit protection (magnetic) for stable, repeatable protection across a wide range of operating conditions.
• OEM-prime compatibility: designed to work with matching GE OEM load centers and panelboards, ensuring reliable fit and predictable performance when upgrading or replacing components.
• Versatile application: ideal for residential panels, light commercial distributions, and small industrial circuits where dependable branch-circuit protection is essential.

This 1-pole breaker is specifically built to interrupt fault currents promptly while maintaining safe operation under normal load. The 15A rating makes it suitable for circuits that require moderate current handling, such as lighting, receptacle branches, small equipment feeds, and other common residential and commercial circuits. By choosing a bolt-on design, you gain a robust connection that resists vibration and thermal cycling, contributing to longer-term reliability in service panels.

Designed for use in: panelboards and load centers that rely on GE’s molded case protection, with a focus on residential, commercial, and light industrial environments where consistent performance matters. This is the kind of component electricians select to minimize nuisance trips and ensure predictable response during fault conditions.

Specifications at a glance:

• Manufacturer: General Electrics
• Part Number: THHQB1115ST1
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical setup tips:

• Pair this breaker with the appropriate GE OEM load centers and panelboards to ensure a clean, code-compliant install.
• Install by a qualified electrician, following the panel manufacturer’s torque and mounting guidelines to maintain a solid, vibration-resistant connection.
• Use in circuits where stable thermal-magnetic protection is beneficial, such as lighting runs, outlets, and small equipment feeders in homes or light commercial spaces.

Whether you’re upgrading an aging panel, stocking a repair kit for field service, or outfitting a new installation, the THHQB1115ST1 delivers dependable, straightforward protection with a bolt-on mount that stays secure and a trip system that responds precisely when needed. It’s the reliable choice for clean, compliant electrical protection in GE-aligned panel environments.