Cutler-Hammer FS340020A - 340020A, 3-Pole, Circuit Breaker

Meet the Cutler-Hammer FS340020A — a purpose-built 3-pole circuit breaker engineered to deliver dependable overcurrent protection in demanding electrical environments. With a current rating of 340020A, this device provides robust safeguarding for three-phase systems across panelboards, switchboards, and control panels, helping to prevent damage from faults and overloads.

Why the FS340020A stands out

• Three-pole synchronization: The 3-pole design ensures all three phases trip together, reducing the risk of phase-to-phase faults and protecting motor controllers, drives, and other three-phase equipment.
• Industrial-grade reliability: Built to perform in factory floors, processing plants, and commercial settings, this Cutler-Hammer breaker is designed for consistent operation in distribution panels and motor control centers.
• Precise current protection: With a clearly defined current rating of 340020A, it provides predictable interruption behavior, helping keep critical loads safe without nuisance trips during normal startup transients.
• Versatile integration: Ideal for panelboards, switchboards, and control panels, enabling streamlined protection architecture in new builds or retrofit projects.

Key specifications at a glance

• Current rating: 340020A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Best use scenarios

This 3-pole Cutler-Hammer breaker is well-suited for industrial, commercial, and OEM applications where reliable overcurrent protection and safe operation are critical. Examples include:

• Motor control centers safeguarding three-phase motors, pumps, and conveyors in manufacturing facilities
• Panelboards and switchboards feeding distributed loads in warehouses or processing plants
• Control panels for automated equipment where coordinated phase protection minimizes downtime and equipment wear

How it solves real problems

Three-phase systems demand synchronized protection to prevent cascading faults. The FS340020A’s 3-pole construction ensures that if one phase deviates or shorts, all three lines disconnect together, reducing electrical stress on downstream components and enabling safer, faster fault clearance. This behavior translates to less unplanned downtime, fewer component failures, and greater peace of mind in environments where continuous operation matters.

Practical considerations and tips

When integrating the FS340020A, match it to your distribution architecture to ensure seamless compatibility with existing panelboards or MCCs. Plan for straightforward replacement in retrofit projects by verifying mounting, bus-bar interfaces, and current-rating alignment with your three-phase loads. For routine maintenance, monitor for abnormal trip history and verify that loading stays within the specified rating to preserve long-term reliability.

Who should consider this breaker

Engineers, electrical contractors, and OEM designers seeking a durable, three-pole protection device for three-phase systems will benefit from the FS340020A. It’s particularly valuable in environments where motor-driven equipment and critical loads demand synchronized disconnection and predictable protection without compromising performance.

Opt for the Cutler-Hammer FS340020A when you need a trusted, industry-grade 3-pole circuit breaker that integrates cleanly into panelboards, switchboards, and control panels while delivering precise overcurrent protection for three-phase systems.