Square D KCB34150 - 150 A, 480 V, 3-Pole Plug-In Circuit Breaker | AmpState

Square D KCB34150 is a 150A, 480V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Available from AmpState, this breaker is built for fast, reliable protection in demanding electrical environments.

Fast, field-ready protection with plug-in convenience

• Plug-in mounting enables rapid installation and seamless replacement, reducing downtime during servicing or panel upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit tripping for immediate response to severe faults.
• 3-pole design in a 150A, 480V configuration ensures balanced protection for three-phase circuits common in commercial and light industrial systems.
• Designed to be compatible with matching OEM load centers and panelboards, delivering a consistent fit and reliable electrical performance within your distribution system.
• Versatile across residential, commercial, and light industrial applications—ideal for protecting feeders, motors, and distribution circuits in panelboards and load centers.

Why the KCB34150 stands out for 480V, three-phase systems

This plug-in breaker emphasizes straightforward installation and dependable protection without the complexity of bolt-on variants. The thermal-magnetic trip unit adapts to load variations while guarding against short circuits, helping prevent equipment damage and nuisance trips. Its 480V rating makes it suitable for three-phase power distribution, where reliable coordination with your protection strategy is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: KCB34150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Plug-in
• Applications: Branch circuit overcurrent and short-circuit protection

Best-use scenarios and practical insights

• Ideal for new installations or panel upgrades in commercial spaces, industrial facilities, and multimetered residential buildings with 480V three-phase distribution.
• Excellent choice for protecting feeders and motors in load centers that require quick plug-in replacement to minimize downtime during maintenance.
• When selecting a breaker, ensure your panelboard is compatible with the KCB34150’s plug-in form factor and that the 150A, 480V, 3-pole configuration matches your circuit design.
• For replacement projects, confirm consistent three-phase wiring and a matching OEM load center fit to maintain dependable trip performance and electrical coordination.