Square D QOU335 - 35 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU335 is a 35A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and loadcenters. Built for rugged reliability, it’s the right choice when you need solid protection that stands up to vibration and varying electrical loads.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose connections in dynamic electrical environments.
• Thermal-magnetic trip unit offers stable, repeatable protection: the thermal element handles sustained overloads, while the magnetic element delivers instantaneous action for short-circuit events.
• OEM-compatible design ensures seamless compatibility with matching Square D loadcenters and panelboards, making replacements and upgrades straightforward.
• Versatile application suited for residential, commercial, and light industrial panel installations where reliable overcurrent protection is essential.

Who should consider the QOU335?

Ideal for electricians and facilities managers upgrading existing panels or building new electrical systems that require robust, compliant protection at a 35A rating. Its three-pole configuration is well-suited for three-phase circuits and multi-pole protection schemes in a variety of panelboard layouts.

Why this design matters

Choosing a bolt-on molded case circuit breaker with a thermal-magnetic trip unit means fewer nuisance trips and more predictable performance under both overload and fault conditions. The combination of secure mounting, reliable trip behavior, and OEM compatibility helps safeguard wiring, motors, and connected equipment in everyday operations and demanding environments.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOU335
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 35A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Upgrade or install with confidence, knowing you’re using a proven Square D solution built for reliability in panelboards and loadcenters. Choose the QOU335 for robust, plug-and-play protection that aligns with your existing gear and delivers consistent performance day after day.