Square D QOU235 - 35 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU235 is a 35A, 240V, 2-pole bolt-on molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for real-world reliability, it uses a secure bolt-on mounting for a rigid, vibration-resistant bus connection and a thermal-magnetic trip unit that delivers stable, repeatable protection performance when it matters most.

Why this breaker stands out

• : Creates a solid, vibration-resistant connection to the bus, reducing loosening risks in panels that experience mechanical stress or movement.
• : Combines precise current sensing with fast hot/cold overload response, protecting both conductors and devices from damage during sustained overloads or sudden faults.
• : Designed to pair with matching Square D OEM load centers and panelboards, ensuring a reliable fit and straightforward upgrades or replacements.
• : Ideal for residential, commercial, and light industrial installations where 240V circuits require robust protection without compromising space or serviceability.
• : 2-pole construction, 35A rating, 240V operation—well-suited for branch circuits that demand dependable, code-compliant protection.

What problems it solves

This breaker addresses common electrical concerns: preventing nuisance trips from minor surges, guarding against dangerous short circuits, and providing a durable, long-lasting protection solution in panelboards and load centers. The bolt-on design minimizes connection-related failures, while the thermal-magnetic mechanism ensures predictable behavior across a range of operating conditions.

Ideal use cases

• Replacing or upgrading breakers in existing Square D panelboards and load centers where a 2-pole, 35A, 240V unit is required.
• New installations in residential or light commercial subpanels that demand reliable 240V branch circuit protection.
• Energy systems or equipment with motors and inductive loads that benefit from precise thermal-magnetic tripping characteristics.
• Applications where vibration resistance and secure mounting are critical for long-term serviceability.

How it compares to alternatives

Compared to plug-in designs, the bolt-on construction of the QOU235 provides a more rigid connection to the panel bus, reducing motion-induced wear and improving longevity in environments with vibration or panel movement. The molded case construction combined with a thermal-magnetic trip unit offers a compact, dependable protective solution that is straightforward to spec for 240V circuits and aligns with Square D’s OEM panel family for consistent performance.

Technical specifications at a glance

• : Square D
• : QOU235
• : Thermal-magnetic molded case circuit breaker
• : 35A
• : 240V
• : 2
• : Bolt-on
• : Branch circuit overcurrent and short-circuit protection

Whether you’re maintaining an existing panel or planning a panel upgrade, the Square D QOU235 delivers precise protection, durable construction, and OEM-compatible performance you can rely on—now available from AmpState.