Square D QOB250EPD - 50 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB250EPD is a purpose‑built 50A, 240V, 2‑pole bolt‑on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short‑circuit protection in panelboards and loadcenters. Built for long‑lasting performance, this breaker combines a rugged mounting method with precise protection characteristics to keep electrical systems safe and operational.

• Secure bolt‑on mounting provides a rigid, vibration‑resistant bus connection, improving reliability in panels subject to movement or vibration.
• Thermal‑magnetic trip unit delivers stable, repeatable protection by combining overload (thermal) protection with instantaneous short‑circuit interruption (magnetic), reducing nuisance trips and ensuring quick response to faults.
• OEM‑level compatibility is designed to work with matching Square D OEM loadcenters and panelboards, simplifying replacement and ensuring proper fit and performance.
• Versatile for multiple environments—suitable for residential, commercial, and light industrial applications where 240V branch circuits require solid protection.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOB250EPD
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt‑on
• Application: Branch circuit overcurrent and short‑circuit protection

Real‑world use cases

• Protecting 240V branch circuits in new or retrofit panelboards and loadcenters where a secure bolt‑on connection is preferred for stability in dusty or vibration‑prone environments.
• Supplying reliable protection for 240V equipment in light commercial installations, such as lighting panels, HVAC subpanels, or small‑to‑mid‑demand circuits.
• Replacing aging or incompatible breakers in OEM panels with a matching bolt‑on solution that preserves panel labeling and performance characteristics.

Why this model stands out

• Distinctive bolt‑on design ensures a robust, vibration‑resistant connection that stays secure over time.
• The thermal‑magnetic protection strategy provides dependable, predictable interrupting behavior tailored to both sustained overloads and sudden faults.
• Designed to mate with matching Square D OEM loadcenters and panelboards, reducing compatibility risk and easing future maintenance or upgrades.

Whether you're configuring a new panel, upgrading an aging installation, or stocking essential protection for 240V circuits, the Square D QOB250EPD delivers targeted protection with durable construction and panel‑level compatibility. It’s a precise, dependable choice for safeguarding residential, commercial, and light industrial electrical systems.