Square D FA36045 - 45 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D FA36045 3‑pole plug‑in molded case circuit breaker—a reliable, high‑performing guardian for your 3‑phase electrical systems. With a 45A rating and a 600V maximum, this breaker is built to protect branch circuits in panelboards and load centers, keeping equipment safe and downtime to a minimum. Its fast plug‑in connection means quicker installations and simpler replacements, making it a smart choice for ongoing maintenance and upgrades.

Why choose the FA36045 for your electrical system

• Fast plug‑in connection: Designed for quick installations and easy replacements, reducing installation time and labor costs on service calls or new builds.
• Thermal‑magnetic trip unit: Provides stable, repeatable protection by automatically responding to abnormal heat and magnetic fault conditions, helping prevent damage from both overloads and short circuits.
• 3‑pole design for 3‑phase systems: Ensures coordinated protection across all three phases, which is essential for motors, equipment, and other 3‑phase loads.
• OEM load center compatibility: Engineered to pair with matching Square D OEM load centers and panelboards for seamless electrical integration and reliable performance.
• Versatile application: Suitable for residential, commercial, and light industrial environments where robust branch circuit protection is required.

Technical snapshot

• Manufacturer: Square D
• Part Number: FA36045
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug‑in
• Application: Branch circuit overcurrent and short‑circuit protection

Practical use cases

Ideal for upgrading or outfitting 3‑phase panelboards in commercial spaces, light industrial facilities, or service rooms. Use FA36045 to protect motors, HVAC equipment, compressors, and other 3‑phase loads from overcurrent and short circuits. When paired with the correct Square D panelboard, it delivers consistent protection, easier maintenance, and a streamlined replacement path during upgrades or repairs.

Who this is for

Electrical professionals, facility maintenance teams, and system integrators who manage 3‑phase power distribution will appreciate the combination of quick installation, reliable thermal‑magnetic protection, and OEM compatibility. It’s a practical, long‑term solution for keeping critical circuits safe and equipment operating smoothly.

Invest in the FA36045 to ensure dependable, code‑compliant protection for your 3‑phase distribution, with a plug‑in design that keeps installation and replacements efficient—and peace of mind, guaranteed by proven Square D reliability.