Square D Q4L3300 - 300 A, 240 V, 3-Pole Circuit Breaker | AmpState

The Square D Q4L3300 is a 300A, 240V, 3-pole molded case circuit breaker engineered for reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed to integrate seamlessly with matching OEM Square D panels, this breaker delivers dependable protection for demanding electrical systems in residential, commercial, and light industrial settings.

• Compact molded case design maximizes panel space and simplifies layouts for cleaner, more efficient installations.
• Thermal-magnetic trip unit provides stable, repeatable protection across varying loads and temperatures, reducing nuisance trips while safeguarding equipment.
• Three-pole configuration delivers balanced protection for 3-phase systems, ensuring synchronized fault clearing and system integrity.
• OEM compatibility specifically engineered to fit Square D load centers and panelboards that accept Q4L breakers, simplifying replacement and upgrades.
• Versatile, suitable for multiple sectors ideal for residential, commercial, and light industrial applications where high-current protection is essential.

Key specifications

• Manufacturer: Square D
• Part Number: Q4L3300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical considerations

• Install as primary protection for high-current branch circuits in commercial panelboards and load centers that require robust 300A protection.
• Ideal replacement part for compatible Square D Q4L series setups, helping maintain system continuity and orderly panel organization.
• Suitable for large living spaces with heavy electrical demand, small office suites, retail fixtures, HVAC feeders, and light industrial equipment where dependable trip performance matters.
• When planning upgrades, pair this 3-pole breaker with matching OEM panels to ensure electrical compatibility and streamlined serviceability.

For professionals sourcing reliable, code-compliant protection, the Square D Q4L3300 from AmpState combines space efficiency, precise protection, and industry-standard compatibility. It’s a practical choice for projects that demand trustworthy performance from a trusted brand in electrical distribution.