Square D QO325 - 25 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D QO325 is a 25 A, 240 V, 3-pole plug-in molded case circuit breaker designed to deliver precise, dependable branch circuit protection in residential, commercial, and light industrial panelboards and load centers. Built to handle the rigors of daily electrical demand, this unit combines quick-install plug-in convenience with reliable protection against overcurrent and short-circuit events.

• Fast plug-in connection for quick installation and effortless replacement, keeping service interruptions to a minimum.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, automatically coordinating response to overcurrent and short-circuit conditions.
• OEM-compatible design—engineered to install seamlessly in matching Square D QO load centers and panelboards for a clean, reliable fit.
• Versatile applications suitable for residential panels, commercial distribution, and light industrial electrical layouts.

Key specifications

• Manufacturer: Square D
• Part number: QO325
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 25 A
• Voltage rating: 240 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from the QO325? Electricians, facility managers, and do-it-yourself homeowners upgrading or expanding panels that use Square D’s QO system will find this breaker a natural fit. Its plug-in design simplifies upgrades, servicing, and replacements within existing panelboards and load centers, avoiding the need for extensive rewiring or panel swaps. It’s an ideal choice for wiring a residential subpanel, a small business distribution board, or a light-industrial equipment rack where reliable protection and quick serviceability matter.

Why this matters in practice: protection isn’t just about meeting a current rating—it’s about consistent, predictable performance when faults occur. The QO325’s thermal-magnetic trip mechanism minimizes nuisance trips while delivering fast, decisive action during true faults. Paired with OEM compatibility and a plug-in installation path, this breaker supports long-term reliability, easier maintenance, and reduced downtime across your electrical distribution system.

Practical tips for optimal use:

• Confirm your panelboard is part of the Square D QO family to ensure a perfect fit and reliable operation.
• Use the plug-in design to perform seamless swaps during maintenance windows or emergency replacements.
• Keep a stock of compatible QO breakers on hand in facilities with multiple panels to shorten response times during outages.