Square D PLL34100 - 1000 A, 480 V, 3-Pole Circuit Breaker | AmpState

The Square D PLL34100 is a high-capacity, 3-pole molded case circuit breaker designed to safeguard large distribution systems with precision and reliability. With a 1000 A rating at 480 V, this unit delivers dependable branch circuit overcurrent and short-circuit protection for panelboards and load centers in demanding residential, commercial, and light industrial environments.

Why the PLL34100 stands out

• Compact molded case design maximizes panel space without sacrificing protection strength, making it easier to fit into dense, multi-breaker panels.
• Thermal-magnetic trip unit provides stable, repeatable protection performance against both overloads and short circuits, delivering fast response when it matters most.
• OEM-friendly compatibility engineered to pair seamlessly with matching OEM load centers and panelboards, simplifying retrofits and upgrades.
• Versatile 3-pole configuration supports three-phase systems commonly used in commercial and light industrial applications, while still suitable for substantial residential installations requiring robust protection.

Ideal applications and use cases

• Branch circuit protection for large panelboards and load centers where high current capacity is required
• Main or feeder protection in commercial electrical distribution setups
• Replacement or upgrade in existing Square D installations to maintain consistent protection characteristics
• Situations demanding predictable trip behavior in environments with varying ambient temperatures

Technical snapshot

• Manufacturer: Square D
• Part Number: PLL34100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 1000 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for installation and performance

Choose the PLL34100 when you need a robust, high-capacity protective device that fits within standard panelboard footprints. Its compact form factor, combined with a reliable thermal-magnetic trip, helps minimize nuisance trips while delivering consistent protection as system loads fluctuate. Ensure proper alignment with compatible OEM panelboards, and follow panel manufacturer torque specs and installation guidelines to maintain optimal protection performance.

What you gain with this breaker

• Clear protection for high-demand circuits without sacrificing panel space
• Predictable, repeatable trip behavior that enhances system reliability
• Streamlined upgrades in existing Square D ecosystems thanks to OEM compatibility
• Peace of mind for customers managing residential, commercial, or light industrial electrical needs