Square D Q4L3350 - 350 A, 240 V, 3-Pole Circuit Breaker | AmpState

Powerful, space‑efficient protection for demanding electrical systems—the Square D Q4L3350 is a 3‑pole molded case circuit breaker rated for 350A at 240V. Engineered to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and loadcenters, this device is built to withstand the rigors of residential, commercial, and light industrial environments.

• Compact molded case design saves panel space and simplifies installation in crowded electrical panels.
• Thermal‑magnetic trip unit provides stable, repeatable protection by rapidly sensing overloads and short circuits for reliable performance over time.
• 350A, 240V, 3‑pole configuration supports high‑current, three‑phase protection for main feeders and heavy branch circuits.
• OEM loadcenter compatibility ensures a smooth, worry‑free fit with matching Square D panelboards and loadcenters.
• Versatile for multiple sectors ideal for modern homes, commercial spaces, and light industrial installations requiring robust protection.

Ideal use scenarios

Use the Q4L3350 as a main or large feeder breaker in compatible panelboards to guard high‑current distribution circuits. It’s well suited for three‑phase motor circuits, large lighting or HVAC feeds, and other demanding loads where precise protection coordination is essential. With its OEM compatibility, you can upgrade or expand existing installations without compromising performance or space in your panel lineup.

What makes this breaker different

Unlike generic protective devices, the Square D Q4L3350 combines a compact molded case with a thermal‑magnetic trip, delivering consistent protection across temperature and load conditions. Its three‑pole construction aligns with three‑phase systems, while the 350A rating provides ample headroom for future growth. The design prioritizes panel space efficiency and straightforward replacement within Square D‑barely‑compatible ecosystems, reducing downtime and installation complexity.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: Q4L3350
• Type: Thermal‑magnetic molded case circuit breaker
• Ampere rating: 350A
• Voltage rating: 240V
• Number of poles: 3
• Application: Branch circuit overcurrent and short‑circuit protection