Square D FHL36045 - 45 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D FHL36045—a compact, reliable 3-pole molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. With a 45 A rating and a 600 V maximum, this breaker is built to handle demanding commercial and light industrial environments, while remaining suitable for select residential applications that require three‑pole protection.

Why this breaker stands out in its class

• Space-efficient design: The molded case construction minimizes panel footprint, freeing up valuable space in crowded panels without sacrificing protection performance.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection across varying loads and fault conditions, helping prevent nuisance trips and ensuring predictable operation when it matters most.
• OEM-compatible: Designed to pair with matching Square D load centers and panelboards, supporting seamless replacement, faster commissioning, and consistent electrical performance.
• Versatile application profile: Suitable for residential, commercial, and light industrial circuits, making it a dependable choice for multi-use electrical installations.

Technical snapshot

• Manufacturer: Square D
• Part Number: FHL36045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical use scenarios

• Protecting three-phase feeders in commercial panelboards where compact space and reliable trip action are critical.
• Upgrading or replacing aging breakers in light industrial distribution systems to maintain OEM protection characteristics.
• Configuring small-to-mid size residential multi‑unit installations that require three-pole protection for balanced phase loading.

How this choice translates to real-world outcomes

• Reduced panel clutter and easier wiring management thanks to its compact footprint.
• Lower risk of unexpected outages due to a dependable thermal-magnetic trip that reacts quickly to overloads and short circuits.
• Peace of mind from compatibility with existing Square D panels, ensuring consistent fit, alignment, and performance.

Whether you’re stocking a parts cabinet for service calls or outfitting a new build with dependable protection, the Square D FHL36045 delivers precise, reliable circuit protection that professionals trust. Rely on tested performance, OEM compatibility, and a design that respects your panel space—all in a single, easy-to-specify 45 A, 600 V, 3-pole solution from AmpState.