Square D QO245 - 45 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D QO245 — a 45A, 240V, 2-pole plug-in molded case circuit breaker from AmpState that brings dependable branch-circuit protection to your panelboards and load centers. Engineered for fast installation and long-term reliability, this unit is a purpose-built solution for residential, commercial, and light industrial electrical systems.

• Fast plug-in connection: Designed for quick installation or replacement, minimizing panel downtime and simplifying service calls.
• Thermal-magnetic trip unit: Provides stable, repeatable protection by combining thermal overcurrent sensing with magnetic short-circuit action—reducing nuisance trips and safeguarding connected loads.
• OEM-compatible design: Precisely aligned to pair with matching Square D load centers and panelboards, ensuring proper fit, rating, and performance without compatibility issues.
• 2-pole, 45A, 240V capability: Ideal for 240V branch circuits that demand reliable protection for high-energy loads like central air systems, electric water heaters, and other 240V equipment.
• Versatile across environments: Suitable for new installations, panel upgrades, or retrofits in homes, small businesses, and light industrial settings.

Why this breaker matters

The QO245 isn’t just about cutting power when something goes wrong. Its thermal-magnetic protection responds quickly to short circuits while calmly handling sustained overcurrents, helping prevent insulation damage, arc fault hazards, and unexpected equipment downtime. The plug-in format reduces installation complexity, making it a practical choice for panel maintenance programs and field service teams seeking fast, reliable replacements.

Specifications at a glance

Who should consider the Square D QO245?

Electrical professionals installing or upgrading panelboards and load centers that require reliable 240V branch-circuit protection with OEM-aligned components will appreciate the QO245 for its plug-in convenience and consistent protection characteristics. It’s a practical fit for projects involving 240V HVAC equipment, electric heating, water heating systems, or any two-pole 240V circuit where dependable tripping behavior matters.

Practical tips for the best results

• Verify panel compatibility with the Square D QO family before installation to ensure seamless fit and labeling compliance.
• Use proper torque on plug-in terminals according to manufacturer specifications to maintain secure electrical connections.
• Keep track of replacement intervals as part of routine panel maintenance to minimize downtime during service events.
• Pair with matching accessories or enclosures from the QO line to maintain voltage and trip reliability across the system.

Upgrade or retrofit with confidence—the Square D QO245 delivers precise protection, quick serviceability, and peace of mind for everyday electrical demands in a compact, plug-in package.