Square D | FHB36040 | Circuit Breaker | 3-Pole | Plug-In

Square D FHB36040 is a 3-pole plug-in circuit breaker crafted for professionals who value precise compatibility and fast, reliable operation in 3‑phase panels. Perfect for maintenance, retrofit, and replacement work, this breaker slides in where you need uninterrupted power protection with minimal downtime.

What makes the FHB36040 stand out?

• 3-Pole configuration supports three-phase circuits, delivering dependable protection across all three conductors.
• Plug-In design enables straightforward installation and quick swaps in compatible Square D panels, reducing service time on the job.
• Designed for retrofit and replacement projects, letting you upgrade or replace aging breakers without overhauling the panel.
• Compatibility is keyed to the part number – the best reference for matching your panel’s requirements. Confirm fit and ratings before ordering.
• Trusted brand engineering from Square D ensures consistent trip performance and reliable operation in critical electrical systems.

Who should consider the FHB36040? Electricians, facilities managers, and maintenance technicians working with legacy or upgraded 3‑phase systems that require a plug-in, trip‑rated circuit breaker with exact specs. It’s especially useful when you’re conducting periodic maintenance, implementing a retrofit, or performing a precise replacement where matching specs matter.

Pro tips for best results: always verify compatibility by cross‑referencing the part number FHB36040 with your panel’s model and required ratings before purchasing. Keep a spare on hand for planned maintenance to minimize downtime.