Square D QOU245 - 45 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU245 is a 2-pole, 45 A, 240 V bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection for your panelboards and loadcenters. With a purpose-built combination of robust construction and precise protection, it’s engineered to keep electrical systems safe in everyday demanding environments.

• Secure bolt-on mounting: A rigid, vibration-resistant bus connection minimizes movement and wear, helping maintain a stable, repeatable protection profile even in panels subjected to vibration from motors or HVAC equipment.
• Thermal-magnetic trip unit: The integrated thermal element detects sustained overloads while the magnetic mechanism responds instantly to short circuits, delivering reliable protection without nuisance trips.
• OEM compatibility: Designed to pair with matching Square D loadcenters and other OEM panelboards, ensuring a clean fit, proper electrical coordination, and straightforward replacement.
• Versatile application: Suitable for residential, commercial, and light industrial settings where dependable circuit protection is essential for safety and uptime.
• Key specs at a glance: 45 A rating, 240 V, 2-pole, bolt-on mounting—a compact solution for protecting branch circuits and preventing short-circuit damage.

Why this matters: in any electrical panel, consistent protection means fewer unexpected outages and safer operation of downstream equipment. The QOU245’s bolt-on design and thermal-magnetic trip ensure a durable connection and reliable response when you need it most—whether you’re wiring a new panel, upgrading an older installation, or stocking a replacement breaker for maintenance.

Ideal use cases

• Branch circuit protection in residential subpanels, commercial service panels, and light-industrial control panels
• Protection for circuits feeding motors, pumps, lighting looms, and other everyday loads within its 45 A capacity
• Replacement for compatible bolt-on breakers in OEM panelboards where a precise fit and proven performance are required

Installation and compatibility notes

Choose the QOU245 when your panelboard or loadcenter requires a 2-pole, 240 V bolt-on breaker with reliable thermal-magnetic protection. Confirm that your enclosure is designed for bolt-on breakers of this specification to ensure a proper fit and safe operation. The combination of secure mounting, robust insulation, and coordinated trip characteristics helps deliver long-term reliability in busy electrical environments.