Square D QOTHT - Circuit Breaker | AmpState

The Square D QOTHT molded case circuit breaker delivers dependable branch circuit overcurrent and short-circuit protection for panelboards and load centers. Engineered for compact installations and reliable performance, this breaker helps keep your electrical system safe without sacrificing valuable panel space.

Key advantages

• Compact molded case design frees up space in crowded panels while maintaining robust protection.
• Thermal-magnetic trip unit provides stable, repeatable protection curves, ensuring predictable responses to overloads and short circuits.
• OEM compatibility designed to work with matching Square D loadcenters and panelboards for a seamless, dependable fit.
• Versatile application suitable for residential, commercial, and light industrial environments, where reliable protection matters most.

Who this is for

Ideal for electrical professionals and DIYers upgrading or replacing breakers in existing systems. If you’re remodeling a panel, expanding capacity, or simply restoring protection in a Square D-installed setup, the QOTHT is built to integrate smoothly and perform consistently over time.

Compatibility & installation

Built to pair with matching OEM loadcenters and panelboards, the QOTHT ensures plug-and-play fitment and dependable circuit isolation. Its compact form factor supports efficient use of space in both new builds and retrofit projects, while the thermal-magnetic mechanism provides reliable tripping behavior across varying ambient conditions.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOTHT
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

• Residential panel upgrades where space is limited but protection must be uncompromised.
• Commercial panelboards that require reliable coordinating protection for multiple branch circuits.
• Light industrial installations needing durable protection with a consistent trip profile for circuits with varying loads.

With the Square D QOTHT, you gain a trusted, code-compliant solution that prioritizes safety, space efficiency, and long-term reliability in a wide range of panel configurations. If you’re looking for a dependable breaker that teammates can install quickly and that integrates seamlessly with existing Square D infrastructure, the QOTHT is a thoughtful, performance-driven choice.