Square D FH36045 - 45 A, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D FH36045 — a 45A, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for professionals who value fast setup and precise protection, this unit pairs a quick-connect plug-in design with a thermal-magnetic trip mechanism for reliable performance under real-world conditions.

• Fast plug-in connection enables rapid installation and effortless replacement, reducing downtime during upgrades or service visits.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying loads, ensuring safe interruption when faults occur while minimizing nuisance trips.
• 3-pole configuration suited for 3-phase panelboards and multiwire circuits, offering coordinated protection for commercial and light industrial applications.
• OEM-compatible design engineered to integrate with matching Square D load centers and panelboards for reliable fit, proper bus alignment, and consistent trip performance.
• Versatile application ideal for residential, commercial, and light industrial electrical systems requiring robust branch-circuit protection at 45A.

Technical snapshot: Square D FH36045, 45A, 3-pole, plug-in molded case circuit breaker, thermal-magnetic trip, part number FH36045. It protects electrical wiring and connected devices from overcurrent and short circuits, interrupting fault currents quickly to prevent damage and fire hazards.

Why this breaker stands out

This device is designed to integrate seamlessly with Square D panel ecosystems, delivering consistent trip curves and long-term reliability. The plug-in format simplifies upgrades and replacements in existing installations without reworking bus bars or panel wiring, making maintenance smoother and faster.

Practical use cases

• Upgrading an aging residential panel that requires a reliable 3-pole 45A protection solution.
• Retrofits in small commercial panels to support 3-phase loads while maintaining precise overcurrent protection.
• Light industrial setups where fast replacement and dependable fault interruption minimize downtime and safeguard equipment.